Convert.ToString 方法

定義

命名空間:: System

組件:: mscorlib.dll, System.Runtime.Extensions.dll

組件:: netstandard.dll, System.Runtime.dll

組件:: System.Runtime.Extensions.dll

組件:: mscorlib.dll

組件:: netstandard.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

將指定的值轉換為其等價的字串表示。

多載

名稱	Description
ToString(Int32, IFormatProvider)	將指定的 32 位元有號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。
ToString(Int16, Int32)	將 16 位元有號整數的值轉換為指定的基底下等效字串表示。
ToString(DateTime, IFormatProvider)	利用指定的文化特定格式資訊，將指定的 DateTime 值轉換為其等效字串表示。
ToString(Double, IFormatProvider)	將指定的雙精度浮點數值轉換為其等效字串表示。
ToString(Decimal, IFormatProvider)	將指定的十進位數字值轉換為其等效字串表示，並使用指定的文化特定格式資訊。
ToString(Int32, Int32)	將 32 位元有號整數的值轉換為其在指定基底下的等價字串表示。
ToString(Int16, IFormatProvider)	將指定的 16 位元有號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。
ToString(Int64, IFormatProvider)	將指定的 64 位元有號整數值轉換為其等效字串表示，並使用指定的文化特有格式資訊。
ToString(Single, IFormatProvider)	將指定的單精度浮點數值轉換為其等價字串表示，並使用指定的文化特有格式資訊。
ToString(Object, IFormatProvider)	利用指定的文化特定格式資訊，將指定物件的值轉換為其等效字串表示。
ToString(SByte, IFormatProvider)	將指定的 8 位元有號整數值轉換為其等效字串表示，並使用指定的文化特有格式資訊。
ToString(String, IFormatProvider)	回傳指定的字串實例;並未進行實際的轉換。
ToString(UInt16, IFormatProvider)	將指定的 16 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。
ToString(UInt32, IFormatProvider)	將指定的 32 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特有格式資訊。
ToString(UInt64, IFormatProvider)	將指定的 64 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。
ToString(Char, IFormatProvider)	將指定的 Unicode 字元值轉換為其等效字串表示，並使用指定的文化特定格式資訊。
ToString(Int64, Int32)	將 64 位元有號整數的值轉換為其在指定基底下的等價字串表示。
ToString(Byte, Int32)	將 8 位元無符號整數的值轉換為指定基底下的等效字串表示。
ToString(Byte, IFormatProvider)	將指定的 8 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。
ToString(Boolean, IFormatProvider)	將指定的布林值轉換為其等價的字串表示。
ToString(Boolean)	將指定的布林值轉換為其等價的字串表示。
ToString(Byte)	將指定 8 位元無符號整數的值轉換為其等價字串表示。
ToString(Char)	將指定的 Unicode 字元值轉換為其等效字串表示。
ToString(DateTime)	將指定的 DateTime 值轉換為其等價的字串表示。
ToString(Double)	將指定的雙精度浮點數值轉換為其等效字串表示。
ToString(Int16)	將指定的 16 位元有號整數值轉換為其等效字串表示。
ToString(Int32)	將指定 32 位元有符號整數的值轉換為其等價字串表示。
ToString(Decimal)	將指定的十進位數值轉換為其等價的字串表示。
ToString(Object)	將指定物件的值轉換為其等價的字串表示。
ToString(SByte)	將指定的 8 位元有符號整數值轉換為其等價字串表示。
ToString(Single)	將指定的單精度浮點數值轉換為其等效字串表示。
ToString(String)	回傳指定的字串實例;並未進行實際的轉換。
ToString(UInt16)	將指定的 16 位元無符號整數值轉換為其等價字串表示。
ToString(UInt32)	將指定的 32 位元無符號整數值轉換為其等價字串表示。
ToString(UInt64)	將指定 64 位元無符號整數的值轉換為其等效字串表示。
ToString(Int64)	將指定的 64 位元有符號整數值轉換為其等價的字串表示。

ToString(Int32, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 32 位元有號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。

public:
 static System::String ^ ToString(int value, IFormatProvider ^ provider);

public static string ToString(int value, IFormatProvider provider);

public static string ToString(int value, IFormatProvider? provider);

static member ToString : int * IFormatProvider -> string

Public Shared Function ToString (value As Integer, provider As IFormatProvider) As String

參數

value: Int32

要轉換的32位帶正負號整數。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例定義了一個自訂 NumberFormatInfo 類別，其負號為字串「~」，正號為字串「！」。接著它會呼叫 ToString(Int32, IFormatProvider) 將整數陣列中的每個元素轉換成其等價的字串表示法。轉換同時使用不變文化與自訂 NumberFormatInfo 物件。

int[] numbers = { Int32.MinValue, Int32.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (int number in numbers)
   Console.WriteLine("{0,-12}  -->  {1,12}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -2147483648  -->  ~2147483648
//       2147483647  -->  2147483647

let numbers = [| Int32.MinValue; Int32.MaxValue |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-12}  -->  {Convert.ToString(number, nfi),12}"
// The example displays the following output:
//       -2147483648  -->  ~2147483648
//       2147483647  -->  2147483647

Dim numbers() As Integer = { Int32.MinValue, Int32.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Integer In numbers
   Console.WriteLine("{0,-12}  -->  {1,12}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -2147483648  -->  ~2147483648
'       2147483647   -->  2147483647

備註

此實作與 Int32.ToString(IFormatProvider)完全相同。

適用於

ToString(Int16, Int32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將 16 位元有號整數的值轉換為指定的基底下等效字串表示。

public:
 static System::String ^ ToString(short value, int toBase);

public static string ToString(short value, int toBase);

static member ToString : int16 * int -> string

Public Shared Function ToString (value As Short, toBase As Integer) As String

參數

value: Int16

要轉換的16位帶正負號整數。

toBase: Int32

返回值的底數，必須是2、8、10或16。

傳回

String

在基底 value中的toBase串表示。

例外狀況

ArgumentException

toBase 不是2、8、10或16。

範例

以下範例將一個由 16 位元帶號整數陣列中的每個元素轉換為其等價的二進位、八進位、十進位及十六進位字串表示。

int[] bases = { 2, 8, 10, 16};
short[] numbers = { Int16.MinValue, -13621, -18, 12, 19142, Int16.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (short number in numbers)
   {
      Console.WriteLine("   {0,-8}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//       Base 2 conversion:
//          -32768    -->  0x1000000000000000
//          -13621    -->  0x1100101011001011
//          -18       -->  0x1111111111101110
//          12        -->  0x1100
//          19142     -->  0x100101011000110
//          32767     -->  0x111111111111111
//       Base 8 conversion:
//          -32768    -->  0x100000
//          -13621    -->  0x145313
//          -18       -->  0x177756
//          12        -->  0x14
//          19142     -->  0x45306
//          32767     -->  0x77777
//       Base 10 conversion:
//          -32768    -->  0x-32768
//          -13621    -->  0x-13621
//          -18       -->  0x-18
//          12        -->  0x12
//          19142     -->  0x19142
//          32767     -->  0x32767
//       Base 16 conversion:
//          -32768    -->  0x8000
//          -13621    -->  0xcacb
//          -18       -->  0xffee
//          12        -->  0xc
//          19142     -->  0x4ac6
//          32767     -->  0x7fff

let bases = [| 2; 8; 10; 16 |]
let numbers = [| Int16.MinValue; -13621s; -18s; 12s; 19142s; Int16.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        printfn $"   {number,-8}  -->  0x{Convert.ToString(number, baseValue)}"
// The example displays the following output:
//       Base 2 conversion:
//          -32768    -->  0x1000000000000000
//          -13621    -->  0x1100101011001011
//          -18       -->  0x1111111111101110
//          12        -->  0x1100
//          19142     -->  0x100101011000110
//          32767     -->  0x111111111111111
//       Base 8 conversion:
//          -32768    -->  0x100000
//          -13621    -->  0x145313
//          -18       -->  0x177756
//          12        -->  0x14
//          19142     -->  0x45306
//          32767     -->  0x77777
//       Base 10 conversion:
//          -32768    -->  0x-32768
//          -13621    -->  0x-13621
//          -18       -->  0x-18
//          12        -->  0x12
//          19142     -->  0x19142
//          32767     -->  0x32767
//       Base 16 conversion:
//          -32768    -->  0x8000
//          -13621    -->  0xcacb
//          -18       -->  0xffee
//          12        -->  0xc
//          19142     -->  0x4ac6
//          32767     -->  0x7fff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Short = { Int16.MinValue, -13621, -18, 12, 19142, _
                           Int16.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Short In numbers
      Console.WriteLine("   {0,-8}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'       Base 2 conversion:
'          -32768    -->  0x1000000000000000
'          -13621    -->  0x1100101011001011
'          -18       -->  0x1111111111101110
'          12        -->  0x1100
'          19142     -->  0x100101011000110
'          32767     -->  0x111111111111111
'       Base 8 conversion:
'          -32768    -->  0x100000
'          -13621    -->  0x145313
'          -18       -->  0x177756
'          12        -->  0x14
'          19142     -->  0x45306
'          32767     -->  0x77777
'       Base 10 conversion:
'          -32768    -->  0x-32768
'          -13621    -->  0x-13621
'          -18       -->  0x-18
'          12        -->  0x12
'          19142     -->  0x19142
'          32767     -->  0x32767
'       Base 16 conversion:
'          -32768    -->  0x8000
'          -13621    -->  0xcacb
'          -18       -->  0xffee
'          12        -->  0xc
'          19142     -->  0x4ac6
'          32767     -->  0x7fff

let bases = [2; 8; 10; 16]
let numbers = [ Int16.MinValue; -13621s; -18s; 12s; 19142s; Int16.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -8i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -32768    -->  0x1000000000000000
//        -13621    -->  0x1100101011001011
//        -18       -->  0x1111111111101110
//         12       -->  0x1100
//         19142    -->  0x100101011000110
//         32767    -->  0x111111111111111
//     Base 8 conversion:
//        -32768    -->  0x100000
//        -13621    -->  0x145313
//        -18       -->  0x177756
//         12       -->  0x14
//         19142    -->  0x45306
//         32767    -->  0x77777
//     Base 10 conversion:
//        -32768    -->  0x-32768
//        -13621    -->  0x-13621
//        -18       -->  0x-18
//         12       -->  0x12
//         19142    -->  0x19142
//         32767    -->  0x32767
//     Base 16 conversion:
//        -32768    -->  0x8000
//        -13621    -->  0xcacb
//        -18       -->  0xffee
//         12       -->  0xc
//         19142    -->  0x4ac6
//         32767    -->  0x7fff

備註

若 value 為正，且 toBase 為2、8或16，回傳字串使用符號與大小表示法。若 value 為負 toBase 且為 2、8 或 16，則回傳字串使用二的補數表示。這表示高階位元組的高階位元（位元 15）被解釋為符號位元。若 ToString(Int16, Int32) 呼叫該方法來建立一個字串，之後會再轉換回數字，則應呼叫一個假設類似數值表示的方法來執行轉換。這類方法包括 Convert.ToInt16(String, Int32) 和 Int16.Parse(String, NumberStyles)。

適用於

ToString(DateTime, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

利用指定的文化特定格式資訊，將指定的 DateTime 值轉換為其等效字串表示。

public:
 static System::String ^ ToString(DateTime value, IFormatProvider ^ provider);

public static string ToString(DateTime value, IFormatProvider provider);

public static string ToString(DateTime value, IFormatProvider? provider);

static member ToString : DateTime * IFormatProvider -> string

Public Shared Function ToString (value As DateTime, provider As IFormatProvider) As String

參數

value: DateTime

轉換的日期和時間值。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例將一個 DateTime 值轉換成八種不同文化中的等價字串表示。

// Specify the date to be formatted using various cultures.
DateTime tDate = new DateTime(2010, 4, 15, 20, 30, 40, 333);
// Specify the cultures.
string[] cultureNames = { "en-US", "es-AR", "fr-FR", "hi-IN",
                          "ja-JP", "nl-NL", "ru-RU", "ur-PK" };

Console.WriteLine("Converting the date {0}: ",
                  Convert.ToString(tDate,
                          System.Globalization.CultureInfo.InvariantCulture));

foreach (string cultureName in cultureNames)
{
   System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
   string dateString = Convert.ToString(tDate, culture);
   Console.WriteLine("   {0}:  {1,-12}",
                     culture.Name, dateString);
}
// The example displays the following output:
//       Converting the date 04/15/2010 20:30:40:
//          en-US:  4/15/2010 8:30:40 PM
//          es-AR:  15/04/2010 08:30:40 p.m.
//          fr-FR:  15/04/2010 20:30:40
//          hi-IN:  15-04-2010 20:30:40
//          ja-JP:  2010/04/15 20:30:40
//          nl-NL:  15-4-2010 20:30:40
//          ru-RU:  15.04.2010 20:30:40
//          ur-PK:  15/04/2010 8:30:40 PM

// Specify the date to be formatted using various cultures.
let tDate = DateTime(2010, 4, 15, 20, 30, 40, 333)
// Specify the cultures.
let cultureNames = 
    [| "en-US"; "es-AR"; "fr-FR"; "hi-IN";
        "ja-JP"; "nl-NL"; "ru-RU"; "ur-PK" |]

printfn $"Converting the date {Convert.ToString(tDate, CultureInfo.InvariantCulture)}: "

for cultureName in cultureNames do
    let culture = CultureInfo cultureName
    let dateString = Convert.ToString(tDate, culture)
    printfn $"   {culture.Name}:  {dateString,-12}"
// The example displays the following output:
//       Converting the date 04/15/2010 20:30:40:
//          en-US:  4/15/2010 8:30:40 PM
//          es-AR:  15/04/2010 08:30:40 p.m.
//          fr-FR:  15/04/2010 20:30:40
//          hi-IN:  15-04-2010 20:30:40
//          ja-JP:  2010/04/15 20:30:40
//          nl-NL:  15-4-2010 20:30:40
//          ru-RU:  15.04.2010 20:30:40
//          ur-PK:  15/04/2010 8:30:40 PM

' Specify the date to be formatted using various cultures.
Dim tDate As New Date(2010, 4, 15, 20, 30, 40, 333)
' Specify the cultures.
Dim cultureNames() As String = { "en-US", "es-AR", "fr-FR", "hi-IN", _
                                 "ja-JP", "nl-NL", "ru-RU", "ur-PK" }

Console.WriteLine("Converting the date {0}: ", _
                  Convert.ToString(tDate, _
                          System.Globalization.CultureInfo.InvariantCulture))

For Each cultureName As String In CultureNames
   Dim culture As New System.Globalization.CultureInfo(cultureName)
   Dim dateString As String = Convert.ToString(tDate, culture)
   Console.WriteLine("   {0}:  {1,-12}", _
                     culture.Name, dateString)
Next             
' The example displays the following output:
'       Converting the date 04/15/2010 20:30:40:
'          en-US:  4/15/2010 8:30:40 PM
'          es-AR:  15/04/2010 08:30:40 p.m.
'          fr-FR:  15/04/2010 20:30:40
'          hi-IN:  15-04-2010 20:30:40
'          ja-JP:  2010/04/15 20:30:40
'          nl-NL:  15-4-2010 20:30:40
'          ru-RU:  15.04.2010 20:30:40
'          ur-PK:  15/04/2010 8:30:40 PM

備註

此實作與 DateTime.ToString(IFormatProvider)完全相同。

適用於

ToString(Double, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的雙精度浮點數值轉換為其等效字串表示。

public:
 static System::String ^ ToString(double value, IFormatProvider ^ provider);

public static string ToString(double value, IFormatProvider provider);

public static string ToString(double value, IFormatProvider? provider);

static member ToString : double * IFormatProvider -> string

Public Shared Function ToString (value As Double, provider As IFormatProvider) As String

參數

value: Double

要轉換的雙精度浮點數。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例將數值陣列 Double 中的每個元素轉換為四種不同文化中等價的字串表示。

// Define an array of numbers to display.
double[] numbers = { -1.5345e16, -123.4321, 19092.123, 1.1734231911290e16 };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (double number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

// Define an array of numbers to display.
let numbers = [| -1.5345e16; -123.4321; 19092.123; 1.1734231911290e16 |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR"; "ja-JP"; "ru-RU" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn "   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

' Define an array of numbers to display.
Dim numbers() As Double = { -1.5345e16, -123.4321, 19092.123, _
                            1.1734231911290e16 }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Double In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    -1.5345E+16:
'       en-US:          -1.5345E+16
'       fr-FR:          -1,5345E+16
'       ja-JP:          -1.5345E+16
'       ru-RU:          -1,5345E+16
'    
'    -123.4321:
'       en-US:            -123.4321
'       fr-FR:            -123,4321
'       ja-JP:            -123.4321
'       ru-RU:            -123,4321
'    
'    19092.123:
'       en-US:            19092.123
'       fr-FR:            19092,123
'       ja-JP:            19092.123
'       ru-RU:            19092,123
'    
'    1.173423191129E+16:
'       en-US:   1.173423191129E+16
'       fr-FR:   1,173423191129E+16
'       ja-JP:   1.173423191129E+16
'       ru-RU:   1,173423191129E+16

備註

此實作與 Double.ToString(IFormatProvider)

適用於

ToString(Decimal, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的十進位數字值轉換為其等效字串表示，並使用指定的文化特定格式資訊。

public:
 static System::String ^ ToString(System::Decimal value, IFormatProvider ^ provider);

public static string ToString(decimal value, IFormatProvider provider);

public static string ToString(decimal value, IFormatProvider? provider);

static member ToString : decimal * IFormatProvider -> string

Public Shared Function ToString (value As Decimal, provider As IFormatProvider) As String

參數

value: Decimal

用小數轉換。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例將數值陣列 Decimal 中的每個元素轉換為四種不同文化中等價的字串表示。

// Define an array of numbers to display.
decimal[] numbers = { 1734231911290.16m, -17394.32921m,
                      3193.23m, 98012368321.684m };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (decimal number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    1734231911290.16:
//       en-US:     1734231911290.16
//       fr-FR:     1734231911290,16
//       ja-JP:     1734231911290.16
//       ru-RU:     1734231911290,16
//
//    -17394.32921:
//       en-US:         -17394.32921
//       fr-FR:         -17394,32921
//       ja-JP:         -17394.32921
//       ru-RU:         -17394,32921
//
//    3193.23:
//       en-US:              3193.23
//       fr-FR:              3193,23
//       ja-JP:              3193.23
//       ru-RU:              3193,23
//
//    98012368321.684:
//       en-US:      98012368321.684
//       fr-FR:      98012368321,684
//       ja-JP:      98012368321.684
//       ru-RU:      98012368321,684

// Define an array of numbers to display.
let numbers = 
    [| 1734231911290.16m; -17394.32921m; 3193.23m; 98012368321.684m |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR"; "ja-JP"; "ru-RU" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn $"   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//    1734231911290.16:
//       en-US:     1734231911290.16
//       fr-FR:     1734231911290,16
//       ja-JP:     1734231911290.16
//       ru-RU:     1734231911290,16
//
//    -17394.32921:
//       en-US:         -17394.32921
//       fr-FR:         -17394,32921
//       ja-JP:         -17394.32921
//       ru-RU:         -17394,32921
//
//    3193.23:
//       en-US:              3193.23
//       fr-FR:              3193,23
//       ja-JP:              3193.23
//       ru-RU:              3193,23
//
//    98012368321.684:
//       en-US:      98012368321.684
//       fr-FR:      98012368321,684
//       ja-JP:      98012368321.684
//       ru-RU:      98012368321,684

' Define an array of numbers to display.
Dim numbers() As Decimal = { 1734231911290.16d, -17394.32921d, _
                             3193.23d, 98012368321.684d }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Decimal In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    1734231911290.16:
'       en-US:     1734231911290.16
'       fr-FR:     1734231911290,16
'       ja-JP:     1734231911290.16
'       ru-RU:     1734231911290,16
'    
'    -17394.32921:
'       en-US:         -17394.32921
'       fr-FR:         -17394,32921
'       ja-JP:         -17394.32921
'       ru-RU:         -17394,32921
'    
'    3193.23:
'       en-US:              3193.23
'       fr-FR:              3193,23
'       ja-JP:              3193.23
'       ru-RU:              3193,23
'    
'    98012368321.684:
'       en-US:      98012368321.684
'       fr-FR:      98012368321,684
'       ja-JP:      98012368321.684
'       ru-RU:      98012368321,684

備註

此實作與 Decimal.ToString(IFormatProvider)完全相同。

適用於

ToString(Int32, Int32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將 32 位元有號整數的值轉換為其在指定基底下的等價字串表示。

public:
 static System::String ^ ToString(int value, int toBase);

public static string ToString(int value, int toBase);

static member ToString : int * int -> string

Public Shared Function ToString (value As Integer, toBase As Integer) As String

參數

value: Int32

要轉換的32位帶正負號整數。

toBase: Int32

返回值的底數，必須是2、8、10或16。

傳回

String

在基底 value中的toBase串表示。

例外狀況

ArgumentException

toBase 不是2、8、10或16。

範例

以下範例將整數陣列中的每個元素轉換為其二進位、八進位、十進位及十六進位的字串表示。

int[] bases = { 2, 8, 10, 16};
int[] numbers = { Int32.MinValue, -19327543, -13621, -18, 12,
                             19142, Int32.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (int number in numbers)
   {
      Console.WriteLine("   {0,-15}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//    Base 2 conversion:
//       -2147483648      -->  0x10000000000000000000000000000000
//       -19327543        -->  0x11111110110110010001010111001001
//       -13621           -->  0x11111111111111111100101011001011
//       -18              -->  0x11111111111111111111111111101110
//       12               -->  0x1100
//       19142            -->  0x100101011000110
//       2147483647       -->  0x1111111111111111111111111111111
//    Base 8 conversion:
//       -2147483648      -->  0x20000000000
//       -19327543        -->  0x37666212711
//       -13621           -->  0x37777745313
//       -18              -->  0x37777777756
//       12               -->  0x14
//       19142            -->  0x45306
//       2147483647       -->  0x17777777777
//    Base 10 conversion:
//       -2147483648      -->  0x-2147483648
//       -19327543        -->  0x-19327543
//       -13621           -->  0x-13621
//       -18              -->  0x-18
//       12               -->  0x12
//       19142            -->  0x19142
//       2147483647       -->  0x2147483647
//    Base 16 conversion:
//       -2147483648      -->  0x80000000
//       -19327543        -->  0xfed915c9
//       -13621           -->  0xffffcacb
//       -18              -->  0xffffffee
//       12               -->  0xc
//       19142            -->  0x4ac6
//       2147483647       -->  0x7fffffff

let bases = [| 2; 8; 10; 16 |]
let numbers = 
    [| Int32.MinValue; -19327543; -13621; -18; 12; 19142; Int32.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        printfn $"   {number,-15}  -->  0x{Convert.ToString(number, baseValue)}"
// The example displays the following output:
//    Base 2 conversion:
//       -2147483648      -->  0x10000000000000000000000000000000
//       -19327543        -->  0x11111110110110010001010111001001
//       -13621           -->  0x11111111111111111100101011001011
//       -18              -->  0x11111111111111111111111111101110
//       12               -->  0x1100
//       19142            -->  0x100101011000110
//       2147483647       -->  0x1111111111111111111111111111111
//    Base 8 conversion:
//       -2147483648      -->  0x20000000000
//       -19327543        -->  0x37666212711
//       -13621           -->  0x37777745313
//       -18              -->  0x37777777756
//       12               -->  0x14
//       19142            -->  0x45306
//       2147483647       -->  0x17777777777
//    Base 10 conversion:
//       -2147483648      -->  0x-2147483648
//       -19327543        -->  0x-19327543
//       -13621           -->  0x-13621
//       -18              -->  0x-18
//       12               -->  0x12
//       19142            -->  0x19142
//       2147483647       -->  0x2147483647
//    Base 16 conversion:
//       -2147483648      -->  0x80000000
//       -19327543        -->  0xfed915c9
//       -13621           -->  0xffffcacb
//       -18              -->  0xffffffee
//       12               -->  0xc
//       19142            -->  0x4ac6
//       2147483647       -->  0x7fffffff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Integer = { Int32.MinValue, -19327543, -13621, -18, 12, _
                             19142, Int32.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Integer In numbers
      Console.WriteLine("   {0,-15}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'    Base 2 conversion:
'       -2147483648      -->  0x10000000000000000000000000000000
'       -19327543        -->  0x11111110110110010001010111001001
'       -13621           -->  0x11111111111111111100101011001011
'       -18              -->  0x11111111111111111111111111101110
'       12               -->  0x1100
'       19142            -->  0x100101011000110
'       2147483647       -->  0x1111111111111111111111111111111
'    Base 8 conversion:
'       -2147483648      -->  0x20000000000
'       -19327543        -->  0x37666212711
'       -13621           -->  0x37777745313
'       -18              -->  0x37777777756
'       12               -->  0x14
'       19142            -->  0x45306
'       2147483647       -->  0x17777777777
'    Base 10 conversion:
'       -2147483648      -->  0x-2147483648
'       -19327543        -->  0x-19327543
'       -13621           -->  0x-13621
'       -18              -->  0x-18
'       12               -->  0x12
'       19142            -->  0x19142
'       2147483647       -->  0x2147483647
'    Base 16 conversion:
'       -2147483648      -->  0x80000000
'       -19327543        -->  0xfed915c9
'       -13621           -->  0xffffcacb
'       -18              -->  0xffffffee
'       12               -->  0xc
'       19142            -->  0x4ac6
'       2147483647       -->  0x7fffffff

let bases = [2; 8; 10; 16]
let numbers = [ Int32.MinValue; -19327543; -13621; -18; 12; 19142; Int32.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -15i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -2147483648      -->  0x10000000000000000000000000000000
//        -19327543        -->  0x11111110110110010001010111001001
//        -13621           -->  0x11111111111111111100101011001011
//        -18              -->  0x11111111111111111111111111101110
//         12              -->  0x1100
//         19142           -->  0x100101011000110
//         2147483647      -->  0x1111111111111111111111111111111
//     Base 8 conversion:
//        -2147483648      -->  0x20000000000
//        -19327543        -->  0x37666212711
//        -13621           -->  0x37777745313
//        -18              -->  0x37777777756
//         12              -->  0x14
//         19142           -->  0x45306
//         2147483647      -->  0x17777777777
//     Base 10 conversion:
//        -2147483648      -->  0x-2147483648
//        -19327543        -->  0x-19327543
//        -13621           -->  0x-13621
//        -18              -->  0x-18
//         12              -->  0x12
//         19142           -->  0x19142
//         2147483647      -->  0x2147483647
//     Base 16 conversion:
//        -2147483648      -->  0x80000000
//        -19327543        -->  0xfed915c9
//        -13621           -->  0xffffcacb
//        -18              -->  0xffffffee
//         12              -->  0xc
//         19142           -->  0x4ac6
//         2147483647      -->  0x7fffffff

備註

若 value 為正，且 toBase 為2、8或16，回傳字串使用符號與大小表示法。若 value 為負 toBase 且為 2、8 或 16，則回傳字串使用二的補數表示。這表示最高階位元組的最高位元（位元 31）被解釋為符號位元。若 ToString(Int32, Int32) 呼叫該方法來建立一個字串，之後會再轉換回數字，則應呼叫一個假設類似數值表示的方法來執行轉換。這類方法包括 Convert.ToInt32(String, Int32) 和 Int32.Parse(String, NumberStyles)。

適用於

ToString(Int16, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 16 位元有號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。

public:
 static System::String ^ ToString(short value, IFormatProvider ^ provider);

public static string ToString(short value, IFormatProvider provider);

public static string ToString(short value, IFormatProvider? provider);

static member ToString : int16 * IFormatProvider -> string

Public Shared Function ToString (value As Short, provider As IFormatProvider) As String

參數

value: Int16

要轉換的16位帶正負號整數。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例定義了一個自訂 NumberFormatInfo 類別，其負號為字串「~」，正號為字串「！」。接著它會呼叫 ToString(Int16, IFormatProvider) 將 16 位元整數陣列中的每個元素轉換成其等價的字串表示法。轉換同時使用不變文化與自訂 NumberFormatInfo 物件。

short[] numbers = { Int16.MinValue, Int16.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (short number in numbers)
   Console.WriteLine("{0,-8}  -->  {1,8}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -32768    -->    ~32768
//       32767     -->     32767

let numbers = [| Int16.MinValue; Int16.MaxValue |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-8}  -->  {Convert.ToString(number, nfi),8}"
// The example displays the following output:
//       -32768    -->    ~32768
//       32767     -->     32767

Dim numbers() As Short = { Int16.MinValue, Int16.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Short In numbers
   Console.WriteLine("{0,-8}  -->  {1,8}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -32768    -->    ~32768
'       32767     -->     32767

備註

此實作與 Int16.ToString(IFormatProvider)完全相同。

適用於

ToString(Int64, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 64 位元有號整數值轉換為其等效字串表示，並使用指定的文化特有格式資訊。

public:
 static System::String ^ ToString(long value, IFormatProvider ^ provider);

public static string ToString(long value, IFormatProvider provider);

public static string ToString(long value, IFormatProvider? provider);

static member ToString : int64 * IFormatProvider -> string

Public Shared Function ToString (value As Long, provider As IFormatProvider) As String

參數

value: Int64

要轉換的64位帶正負號整數。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例定義了一個自訂 NumberFormatInfo 類別，其負號為字串「~」，正號為字串「！」。接著它呼叫 ToString(Int64, IFormatProvider) 將長整數陣列中的每個元素轉換成其等價字串表示的方法。轉換同時使用不變文化與自訂 NumberFormatInfo 物件。

long[] numbers = { ((long) Int32.MinValue) * 2, ((long) Int32.MaxValue) * 2};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

foreach (long number in numbers)
   Console.WriteLine("{0,-12}  -->  {1,12}",
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                     Convert.ToString(number, nfi));
// The example displays the following output:
//       -4294967296  -->  ~4294967296
//       4294967294  -->  4294967294

let numbers = [| (int64 Int32.MinValue) * 2L; (int64 Int32.MaxValue) * 2L |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-12}  -->  {Convert.ToString(number, nfi),12}"
// The example displays the following output:
//       -4294967296  -->  ~4294967296
//       4294967294  -->  4294967294

Dim numbers() As Long = { CLng(Int32.MinValue) * 2, CLng(Int32.MaxValue) * 2 }
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

For Each number As Long In numbers
   Console.WriteLine("{0,-12}  -->  {1,12}", _
                     Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                     Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       -4294967296  -->  ~4294967296
'       4294967294   -->  4294967294

備註

此實作與 Int64.ToString(IFormatProvider)完全相同。

適用於

ToString(Single, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的單精度浮點數值轉換為其等價字串表示，並使用指定的文化特有格式資訊。

public:
 static System::String ^ ToString(float value, IFormatProvider ^ provider);

public static string ToString(float value, IFormatProvider provider);

public static string ToString(float value, IFormatProvider? provider);

static member ToString : single * IFormatProvider -> string

Public Shared Function ToString (value As Single, provider As IFormatProvider) As String

參數

value: Single

要轉換的單精度浮點數。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例將數值陣列 Single 中的每個元素轉換為四種不同文化中等價的字串表示。

// Define an array of numbers to display.
float[] numbers = { -1.5345e16f, -123.4321f, 19092.123f, 1.1734231911290e16f };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR", "ja-JP", "ru-RU" };

foreach (float number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

// Define an array of numbers to display.
let numbers = [| -1.5345e16f; -123.4321f; 19092.123f; 1.1734231911290e16f |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR"; "ja-JP"; "ru-RU" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn $"   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//    -1.5345E+16:
//       en-US:          -1.5345E+16
//       fr-FR:          -1,5345E+16
//       ja-JP:          -1.5345E+16
//       ru-RU:          -1,5345E+16
//
//    -123.4321:
//       en-US:            -123.4321
//       fr-FR:            -123,4321
//       ja-JP:            -123.4321
//       ru-RU:            -123,4321
//
//    19092.123:
//       en-US:            19092.123
//       fr-FR:            19092,123
//       ja-JP:            19092.123
//       ru-RU:            19092,123
//
//    1.173423191129E+16:
//       en-US:   1.173423191129E+16
//       fr-FR:   1,173423191129E+16
//       ja-JP:   1.173423191129E+16
//       ru-RU:   1,173423191129E+16

' Define an array of numbers to display.
Dim numbers() As Single = { -1.5345e16, -123.4321, 19092.123, _
                            1.1734231911290e16 }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR", "ja-JP", "ru-RU" }

For Each number As Single In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'    -1.5345E+16:
'       en-US:          -1.5345E+16
'       fr-FR:          -1,5345E+16
'       ja-JP:          -1.5345E+16
'       ru-RU:          -1,5345E+16
'    
'    -123.4321:
'       en-US:            -123.4321
'       fr-FR:            -123,4321
'       ja-JP:            -123.4321
'       ru-RU:            -123,4321
'    
'    19092.123:
'       en-US:            19092.123
'       fr-FR:            19092,123
'       ja-JP:            19092.123
'       ru-RU:            19092,123
'    
'    1.173423191129E+16:
'       en-US:   1.173423191129E+16
'       fr-FR:   1,173423191129E+16
'       ja-JP:   1.173423191129E+16
'       ru-RU:   1,173423191129E+16

備註

此實作與 Single.ToString(IFormatProvider)完全相同。

適用於

ToString(Object, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

利用指定的文化特定格式資訊，將指定物件的值轉換為其等效字串表示。

public:
 static System::String ^ ToString(System::Object ^ value, IFormatProvider ^ provider);

public static string ToString(object value, IFormatProvider provider);

public static string? ToString(object? value, IFormatProvider? provider);

static member ToString : obj * IFormatProvider -> string

Public Shared Function ToString (value As Object, provider As IFormatProvider) As String

參數

value: Object

一個提供轉換值的物件，或 null。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

若是值為 null的物件，則的Emptyvaluevalue字串表示。若 value ， null則方法返回 null。

範例

以下範例定義了一個 Temperature 類別，該類別覆蓋該 Object.ToString 方法，但不實作介面 IConvertible 。範例說明了如何呼叫該 Convert.ToString(Object, IFormatProvider) 方法，進而呼叫該 Temperature.ToString 方法。

using System;

public class Temperature
{
   private decimal m_Temp;

   public Temperature(decimal temperature)
   {
      this.m_Temp = temperature;
   }

   public decimal Celsius
   {
      get { return this.m_Temp; }
   }

   public decimal Kelvin
   {
      get { return this.m_Temp + 273.15m; }
   }

   public decimal Fahrenheit
   {
      get { return Math.Round((decimal) (this.m_Temp * 9 / 5 + 32), 2); }
   }

   public override string ToString()
   {
      return m_Temp.ToString("N2") + " °C";
   }
}

public class Example
{
   public static void Main()
   {
      Temperature cold = new Temperature(-40);
      Temperature freezing = new Temperature(0);
      Temperature boiling = new Temperature(100);

      Console.WriteLine(Convert.ToString(cold, null));
      Console.WriteLine(Convert.ToString(freezing, null));
      Console.WriteLine(Convert.ToString(boiling, null));
   }
}
// The example dosplays the following output:
//       -40.00 °C
//       0.00 °C
//       100.00 °C

open System

type Temperature(temperature: decimal) =
    member _.Celsius =
        temperature

    member _.Kelvin =
        temperature + 273.15m

    member _.Fahrenheit =
        Math.Round(temperature * 9m / 5m + 32m |> decimal, 2)

    override _.ToString() =
        temperature.ToString("N2") + " °C"

let cold = Temperature -40
let freezing = Temperature 0
let boiling = Temperature 100

printfn $"{Convert.ToString(cold, null)}"
printfn $"{Convert.ToString(freezing, null)}"
printfn $"{Convert.ToString(boiling, null)}"
// The example dosplays the following output:
//       -40.00 °C
//       0.00 °C
//       100.00 °C

Public Class Temperature 
   Private m_Temp As Decimal

   Public Sub New(temperature As Decimal)
      Me.m_Temp = temperature
   End Sub
   
   Public ReadOnly Property Celsius() As Decimal
      Get
         Return Me.m_Temp
      End Get   
   End Property
   
   Public ReadOnly Property Kelvin() As Decimal
      Get
         Return Me.m_Temp + 273.15d   
      End Get
   End Property
   
   Public ReadOnly Property Fahrenheit() As Decimal
      Get
         Return Math.Round(CDec(Me.m_Temp * 9 / 5 + 32), 2)
      End Get      
   End Property
   
   Public Overrides Function ToString() As String
      Return m_Temp.ToString("N2") & " °C"
   End Function
End Class

Module Example
   Public Sub Main()
      Dim cold As New Temperature(-40)
      Dim freezing As New Temperature(0)
      Dim boiling As New Temperature(100)
      
      Console.WriteLine(Convert.ToString(cold, Nothing))
      Console.WriteLine(Convert.ToString(freezing, Nothing))
      Console.WriteLine(Convert.ToString(boiling, Nothing))
   End Sub
End Module
' The example displays the following output:
'       -40.00 °C
'       0.00 °C
'       100.00 °C

以下範例定義了一個 Temperature 實 IFormattable 作介面但不實作介面的 IConvertible 類別。其 IFormattable.ToString 實作以攝氏、華氏或開爾文為單位， Temperature 視格式字串而定。範例也定義了一個TemperatureProvider類別，該類別實IFormatProvider作並提供一個隨機生成的格式字串，該字串由該類別的實作Temperature使用IFormattable。

using System;

public class Temperature : IFormattable
{
   private decimal m_Temp;

   public Temperature(decimal temperature)
   {
      this.m_Temp = temperature;
   }

   public decimal Celsius
   { get { return this.m_Temp; } }

   public decimal Kelvin
   { get { return this.m_Temp + 273.15m; } }

   public decimal Fahrenheit
   {  get { return Math.Round(this.m_Temp * 9m / 5m + 32m, 2); } }

   public override String ToString()
   {
      return ToString("G", null);
   }

   public String ToString(String fmt, IFormatProvider provider)
   {
      TemperatureProvider formatter = null;
      if (provider != null)
         formatter = provider.GetFormat(typeof(TemperatureProvider))
                                       as TemperatureProvider;

      if (String.IsNullOrWhiteSpace(fmt)) {
         if (formatter != null)
            fmt = formatter.Format;
         else
            fmt = "G";
      }

      switch (fmt.ToUpper()) {
         case "G":
         case "C":
            return m_Temp.ToString("N2") + " °C";
         case "F":
            return Fahrenheit.ToString("N2") + " °F";
         case "K":
            return Kelvin.ToString("N2") + " K";
         default:
            throw new FormatException(String.Format("'{0}' is not a valid format specifier.", fmt));
      }
   }
}

public class TemperatureProvider : IFormatProvider
{
   private String[] fmtStrings = { "C", "G", "F", "K" };
   private Random rnd = new Random();

   public Object GetFormat(Type formatType)
   {
      return this;
   }

   public String Format
   { get { return fmtStrings[rnd.Next(0, fmtStrings.Length)]; } }
}

public class Example
{
   public static void Main()
   {
      Temperature cold = new Temperature (-40);
      Temperature freezing = new Temperature (0);
      Temperature boiling = new Temperature (100);

      TemperatureProvider tp = new TemperatureProvider();

      Console.WriteLine(Convert.ToString(cold, tp));
      Console.WriteLine(Convert.ToString(freezing, tp));
      Console.WriteLine(Convert.ToString(boiling, tp));
   }
}
// The example displays output like the following:
//       -40.00 °C
//       273.15 K
//       100.00 °C

open System

[<AllowNullLiteral>]
type TemperatureProvider() =
    let fmtStrings = [| "C"; "G"; "F"; "K" |]
    let rnd = Random()

    member _.Format =
        fmtStrings[rnd.Next(0, fmtStrings.Length)]

    interface IFormatProvider with
        member this.GetFormat(formatType: Type) =
            this

type Temperature(temperature: decimal) =
    member _.Celsius =
        temperature
    member _.Kelvin =
        temperature + 273.15m

    member _.Fahrenheit =
        Math.Round(temperature * 9m / 5m + 32m, 2)

    override this.ToString() =
        this.ToString("G", null)

    member this.ToString(fmt: string, provider: IFormatProvider) =
        let formatter =
            match provider with
            | null -> null
            | _ ->
                match provider.GetFormat typeof<TemperatureProvider> with
                | :? TemperatureProvider as x -> x
                | _ -> null 

        let fmt = 
            if String.IsNullOrWhiteSpace fmt then
                if formatter <> null then
                    formatter.Format
                else
                    "G"
            else fmt

        match fmt.ToUpper() with
        | "G"
        | "C" ->
            $"{temperature:N2} °C"
        | "F" ->
            $"{this.Fahrenheit:N2}  °F"
        | "K" ->
            $"{this.Kelvin:N2} K"
        | _ ->
            raise (FormatException $"'{fmt}' is not a valid format specifier.")

let cold = Temperature -40
let freezing = Temperature 0
let boiling = Temperature 100

let tp = TemperatureProvider()

printfn $"{Convert.ToString(cold, tp)}"
printfn $"{Convert.ToString(freezing, tp)}"
printfn $"{Convert.ToString(boiling, tp)}"
// The example displays output like the following:
//       -40.00 °C
//       273.15 K
//       100.00 °C

Public Class Temperature : Implements IFormattable 
   Private m_Temp As Decimal 

   Public Sub New(temperature As Decimal)
      Me.m_Temp = temperature
   End Sub 

   Public ReadOnly Property Celsius As Decimal 
      Get 
         Return Me.m_Temp
      End Get    
   End Property 

   Public ReadOnly Property Kelvin As Decimal 
      Get 
         Return Me.m_Temp + 273.15d   
      End Get 
   End Property 

   Public ReadOnly Property Fahrenheit As Decimal 
      Get 
         Return Math.Round(CDec(Me.m_Temp * 9 / 5 + 32), 2)
      End Get       
   End Property 

   Public Overrides Function ToString() As String 
      Return ToString("G", Nothing) 
   End Function 
   
   Public Overloads Function ToString(fmt As String, 
                                      provider As IFormatProvider) As String _
                             Implements IFormattable.ToString
      Dim formatter As TemperatureProvider = Nothing
      If provider IsNot Nothing Then formatter = TryCast(provider.GetFormat(GetType(TemperatureProvider)),
                                                         TemperatureProvider)

      If String.IsNullOrWhiteSpace(fmt) Then
         If formatter IsNot Nothing Then
            fmt = formatter.Format
         Else
            fmt = "G"
         End If
      End If

      Select Case fmt.ToUpper()
         Case "G", "C"
            Return m_Temp.ToString("N2") & " °C" 
         Case "F"
            Return Fahrenheit.ToString("N2") + " °F"
         Case "K"
            Return Kelvin.ToString("N2") + " K"
         Case Else
            Throw New FormatException(String.Format("'{0}' is not a valid format specifier.", fmt))
      End Select
   End Function                             
End Class 

Public Class TemperatureProvider : Implements IFormatProvider
   Private fmtStrings() As String = { "C", "G", "F", "K" }
   Private rnd As New Random()
   
   Public Function GetFormat(formatType As Type) As Object _
                   Implements IFormatProvider.GetFormat 
      Return Me 
   End Function
   
   Public ReadOnly Property Format As String
      Get
         Return fmtStrings(rnd.Next(0, fmtStrings.Length))
      End Get
   End Property
End Class

Module Example
   Public Sub Main()
      Dim cold As New Temperature(-40)
      Dim freezing As New Temperature(0)
      Dim boiling As New Temperature(100)

      Dim tp As New TemperatureProvider()
      
      Console.WriteLine(Convert.ToString(cold, tp))
      Console.WriteLine(Convert.ToString(freezing, tp))
      Console.WriteLine(Convert.ToString(boiling, tp))
   End Sub 
End Module 
' The example displays output like the following:
'       -40.00 °C
'       273.15 K
'       100.00 °C

備註

若參數 value 實作介面， IConvertible 方法 IConvertible.ToString(IFormatProvider) 呼叫的 value實作。否則，如果參數 value 實作了介面， IFormattable 方法就會呼叫其 IFormattable.ToString(String, IFormatProvider) 實作。若 value 未實作任何介面，方法會呼叫參數 value 的方法 ToString() ，並 provider 忽略該參數。

若value參數實IConvertible作 or IFormattable 介面，則使用該provider參數。參數最常見的用途 provider 是指定用於轉換 value的文化特定資訊。例如，若參數 value 為負小數，該 provider 參數可提供負號與十進位分隔符所用符號的文化特定資訊。下一節的第二個例子說明了格式提供者不提供文化敏感格式資訊。

適用於

ToString(SByte, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 8 位元有號整數值轉換為其等效字串表示，並使用指定的文化特有格式資訊。

public:
 static System::String ^ ToString(System::SByte value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString(sbyte value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString(sbyte value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : sbyte * IFormatProvider -> string

Public Shared Function ToString (value As SByte, provider As IFormatProvider) As String

參數

value: SByte

8位元有符號整數用於轉換。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例定義了一個自訂 NumberFormatInfo 類別，其負號為字串「~」，正號為字串「！」。接著它呼叫 Convert.ToString(SByte, IFormatProvider) 該方法，將有符號位元組陣列中的每個元素轉換成其等價的字串表示。轉換同時使用不變文化與自訂 NumberFormatInfo 物件。

sbyte[] numbers = { SByte.MinValue, -12, 17, SByte.MaxValue};
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";
foreach (sbyte number in numbers)
   Console.WriteLine(Convert.ToString(number, nfi));
// The example displays the following output:
//       ~128
//       ~12
//       17
//       127

let numbers = [| SByte.MinValue; -12y; 17y; SByte.MaxValue |]
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"
for number in numbers do
    printfn $"{Convert.ToString(number, nfi)}"
// The example displays the following output:
//       ~128
//       ~12
//       17
//       127

Dim numbers() As SByte = { SByte.MinValue, -12, 17, SByte.MaxValue}
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"
For Each number As SByte In numbers
   Console.WriteLine(Convert.ToString(number, nfi))
Next
' The example displays the following output:
'       ~128
'       ~12
'       17
'       127

備註

此實作與 SByte.ToString(IFormatProvider)完全相同。

適用於

ToString(String, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

回傳指定的字串實例;並未進行實際的轉換。

public:
 static System::String ^ ToString(System::String ^ value, IFormatProvider ^ provider);

public static string? ToString(string? value, IFormatProvider? provider);

public static string ToString(string value, IFormatProvider provider);

static member ToString : string * IFormatProvider -> string

Public Shared Function ToString (value As String, provider As IFormatProvider) As String

參數

value: String

那條線要回來。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。這個參數已忽略。

傳回

String

value 未改變地返回。

範例

以下範例以參數呼叫該 ToString 方法 String 。該方法回傳未修改String的，且不參考物件。IFormatProvider

// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/

// Example of Convert.ToString(non-numeric types, IFormatProvider).
open System
open System.Globalization

// Create an instance of the IFormatProvider with an object expression.
let provider =
    { new IFormatProvider with
        // Normally, GetFormat returns an object of the requested type
        // (usually itself) if it is able; otherwise, it returns Nothing.
        member _.GetFormat(argType: Type) =
            // Here, the type of argType is displayed, and GetFormat
            // always returns Nothing.
            printf $"{argType,-40}"
            null 
    }

// Convert these values using DummyProvider.
let Int32A     = -252645135
let DoubleA    = 61680.3855
let ObjDouble  = -98765.4321 :> obj
let DayTimeA   = DateTime(2001, 9, 11, 13, 45, 0)

let BoolA      = true
let StringA    = "Qwerty"
let CharA      = '$'
let TSpanA     = TimeSpan(0, 18, 0)
let ObjOther   = provider :> obj

[<EntryPoint>]
let main _ =
    printfn
        """This example of Convert.ToString(non-numeric, IFormatProvider) 
generates the following output. The provider type, argument type, 
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String, 
Char, TimeSpan, and non-numeric Object."""

    // The format provider is called for these conversions.
    printfn ""
    let converted = Convert.ToString(Int32A, provider)
    printfn $"int      {converted}"
    let converted = Convert.ToString(DoubleA, provider)
    printfn $"double   {converted}"
    let converted = Convert.ToString(ObjDouble, provider)
    printfn $"object   {converted}"
    let converted = Convert.ToString(DayTimeA, provider)
    printfn $"DateTime {converted}"

    // The format provider is not called for these conversions.
    printfn ""
    let converted = Convert.ToString(BoolA, provider)
    printfn $"bool     {converted}"
    let converted = Convert.ToString(StringA, provider)
    printfn $"string   {converted}"
    let converted = Convert.ToString(CharA, provider)
    printfn $"char     {converted}"
    let converted = Convert.ToString(TSpanA, provider)
    printfn $"TimeSpan {converted}"
    let converted = Convert.ToString(ObjOther, provider)
    printfn $"object   {converted}"

    0

// This example of Convert.ToString(non-numeric, IFormatProvider)
// generates the following output. The provider type, argument type,
// and argument value are displayed.
//
// Note: The IFormatProvider object is not called for Boolean, String,
// Char, TimeSpan, and non-numeric Object.
//
// System.Globalization.NumberFormatInfo   int      -252645135
// System.Globalization.NumberFormatInfo   double   61680.3855
// System.Globalization.NumberFormatInfo   object   -98765.4321
// System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
//
// bool     True
// string   Qwerty
// char     $
// TimeSpan 00:18:00
// object   DummyProvider

' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

適用於

ToString(UInt16, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 16 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。

public:
 static System::String ^ ToString(System::UInt16 value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString(ushort value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString(ushort value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : uint16 * IFormatProvider -> string

Public Shared Function ToString (value As UShort, provider As IFormatProvider) As String

參數

value: UInt16

16位元無符號整數要轉換。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例定義了一個自訂 NumberFormatInfo 類別，其負號為字串「~」，正號為字串「！」。接著它呼叫該 ToString(UInt16, IFormatProvider) 方法，將一個 16 位元的無符號整數值轉換成其等價的字串表示。轉換同時使用不變文化與自訂 NumberFormatInfo 物件。輸出顯示未使用此格式資訊，因為預設「G」格式指定符不包含正號與正值。

ushort number = UInt16.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-6}  -->  {1,6}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//       65535   -->   65535

let number = UInt16.MaxValue
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-6}  -->  {Convert.ToString(number, nfi),6}"
// The example displays the following output:
//       65535   -->   65535

Dim number As UShort = UInt16.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-6}  -->  {1,6}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'       65535   -->   65535

備註

此實作與 UInt16.ToString(IFormatProvider)完全相同。

適用於

ToString(UInt32, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 32 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特有格式資訊。

public:
 static System::String ^ ToString(System::UInt32 value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString(uint value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString(uint value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : uint32 * IFormatProvider -> string

Public Shared Function ToString (value As UInteger, provider As IFormatProvider) As String

參數

value: UInt32

32位元無符號整數要轉換。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例定義了一個自訂 NumberFormatInfo 類別，其負號為字串「~」，正號為字串「！」。接著它呼叫該 ToString(UInt32, IFormatProvider) 方法，將無符號整數值轉換為其等價的字串表示。轉換同時使用不變文化與自訂 NumberFormatInfo 物件。輸出顯示未使用此格式資訊，因為預設「G」格式指定符不包含正號與正值。

uint number = UInt32.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-8}  -->  {1,8}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//       4294967295  -->  4294967295

let number = UInt32.MaxValue
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-8}  -->  {Convert.ToString(number, nfi),8}"
// The example displays the following output:
//       4294967295  -->  4294967295

Dim number As UInteger = UInt32.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-8}  -->  {1,8}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'       4294967295  -->  4294967295

備註

此實作與 UInt32.ToString(IFormatProvider)完全相同。

適用於

ToString(UInt64, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 64 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。

public:
 static System::String ^ ToString(System::UInt64 value, IFormatProvider ^ provider);

[System.CLSCompliant(false)]
public static string ToString(ulong value, IFormatProvider provider);

[System.CLSCompliant(false)]
public static string ToString(ulong value, IFormatProvider? provider);

[<System.CLSCompliant(false)>]
static member ToString : uint64 * IFormatProvider -> string

Public Shared Function ToString (value As ULong, provider As IFormatProvider) As String

參數

value: UInt64

64 位元無符號整數用於轉換。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例定義了一個自訂 NumberFormatInfo 類別，其負號為字串「~」，正號為字串「！」。接著它呼叫 ToString(UInt64, IFormatProvider) 該方法，將無符號長整數值轉換為其等價的字串表示。轉換同時使用不變文化與自訂 NumberFormatInfo 物件。輸出顯示未使用此格式資訊，因為預設「G」格式指定符不包含正號與正值。

ulong number = UInt64.MaxValue;
System.Globalization.NumberFormatInfo nfi = new System.Globalization.NumberFormatInfo();
nfi.NegativeSign = "~";
nfi.PositiveSign = "!";

Console.WriteLine("{0,-12}  -->  {1,12}",
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture),
                  Convert.ToString(number, nfi));
// The example displays the following output:
//    18446744073709551615  -->  18446744073709551615

let number = UInt64.MaxValue
let nfi = NumberFormatInfo()
nfi.NegativeSign <- "~"
nfi.PositiveSign <- "!"

printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture),-12}  -->  {Convert.ToString(number, nfi),12}"
// The example displays the following output:
//    18446744073709551615  -->  18446744073709551615

Dim number As ULong = UInt64.MaxValue
Dim nfi As New System.Globalization.NumberFormatInfo()
nfi.NegativeSign = "~"
nfi.PositiveSign = "!"

Console.WriteLine("{0,-12}  -->  {1,12}", _
                  Convert.ToString(number, System.Globalization.CultureInfo.InvariantCulture), _
                  Convert.ToString(number, nfi))
' The example displays the following output:
'    18446744073709551615  -->  18446744073709551615

備註

此實作與 UInt64.ToString(IFormatProvider)完全相同。

適用於

ToString(Char, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 Unicode 字元值轉換為其等效字串表示，並使用指定的文化特定格式資訊。

public:
 static System::String ^ ToString(char value, IFormatProvider ^ provider);

public static string ToString(char value, IFormatProvider provider);

public static string ToString(char value, IFormatProvider? provider);

static member ToString : char * IFormatProvider -> string

Public Shared Function ToString (value As Char, provider As IFormatProvider) As String

參數

value: Char

要轉換的 Unicode 字元。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。這個參數已忽略。

傳回

String

的 value字串表示。

範例

以下範例使用 Char 該方法將值轉換為 a StringToString ，並使用 IFormatProvider 一個物件顯示該值所呼叫的格式提供者型別。範例顯示該 IFormatProvider 物件並未被參考。

// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/

// Example of Convert.ToString(non-numeric types, IFormatProvider).
open System
open System.Globalization

// Create an instance of the IFormatProvider with an object expression.
let provider =
    { new IFormatProvider with
        // Normally, GetFormat returns an object of the requested type
        // (usually itself) if it is able; otherwise, it returns Nothing.
        member _.GetFormat(argType: Type) =
            // Here, the type of argType is displayed, and GetFormat
            // always returns Nothing.
            printf $"{argType,-40}"
            null 
    }

// Convert these values using DummyProvider.
let Int32A     = -252645135
let DoubleA    = 61680.3855
let ObjDouble  = -98765.4321 :> obj
let DayTimeA   = DateTime(2001, 9, 11, 13, 45, 0)

let BoolA      = true
let StringA    = "Qwerty"
let CharA      = '$'
let TSpanA     = TimeSpan(0, 18, 0)
let ObjOther   = provider :> obj

[<EntryPoint>]
let main _ =
    printfn
        """This example of Convert.ToString(non-numeric, IFormatProvider) 
generates the following output. The provider type, argument type, 
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String, 
Char, TimeSpan, and non-numeric Object."""

    // The format provider is called for these conversions.
    printfn ""
    let converted = Convert.ToString(Int32A, provider)
    printfn $"int      {converted}"
    let converted = Convert.ToString(DoubleA, provider)
    printfn $"double   {converted}"
    let converted = Convert.ToString(ObjDouble, provider)
    printfn $"object   {converted}"
    let converted = Convert.ToString(DayTimeA, provider)
    printfn $"DateTime {converted}"

    // The format provider is not called for these conversions.
    printfn ""
    let converted = Convert.ToString(BoolA, provider)
    printfn $"bool     {converted}"
    let converted = Convert.ToString(StringA, provider)
    printfn $"string   {converted}"
    let converted = Convert.ToString(CharA, provider)
    printfn $"char     {converted}"
    let converted = Convert.ToString(TSpanA, provider)
    printfn $"TimeSpan {converted}"
    let converted = Convert.ToString(ObjOther, provider)
    printfn $"object   {converted}"

    0

// This example of Convert.ToString(non-numeric, IFormatProvider)
// generates the following output. The provider type, argument type,
// and argument value are displayed.
//
// Note: The IFormatProvider object is not called for Boolean, String,
// Char, TimeSpan, and non-numeric Object.
//
// System.Globalization.NumberFormatInfo   int      -252645135
// System.Globalization.NumberFormatInfo   double   61680.3855
// System.Globalization.NumberFormatInfo   object   -98765.4321
// System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
//
// bool     True
// string   Qwerty
// char     $
// TimeSpan 00:18:00
// object   DummyProvider

' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

備註

此實作與 Char.ToString()完全相同。 provider 參數會被忽略。

適用於

ToString(Int64, Int32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將 64 位元有號整數的值轉換為其在指定基底下的等價字串表示。

public:
 static System::String ^ ToString(long value, int toBase);

public static string ToString(long value, int toBase);

static member ToString : int64 * int -> string

Public Shared Function ToString (value As Long, toBase As Integer) As String

參數

value: Int64

要轉換的64位帶正負號整數。

toBase: Int32

返回值的底數，必須是2、8、10或16。

傳回

String

在基底 value中的toBase串表示。

例外狀況

ArgumentException

toBase 不是2、8、10或16。

範例

以下範例將長整數陣列中的每個元素轉換為其等價的二進位、十六進位、十進位及十六進位字串表示。

int[] bases = { 2, 8, 10, 16};
long[] numbers = { Int64.MinValue, -193275430, -13621, -18, 12,
                   1914206117, Int64.MaxValue };

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (long number in numbers)
   {
      Console.WriteLine("   {0,-23}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//    Base 2 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//       12                       -->  0x1100
//       1914206117               -->  0x1110010000110000111011110100101
//       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
//    Base 8 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000
//       -193275430               -->  0x1777777777776436554732
//       -13621                   -->  0x1777777777777777745313
//       -18                      -->  0x1777777777777777777756
//       12                       -->  0x14
//       1914206117               -->  0x16206073645
//       9223372036854775807      -->  0x777777777777777777777
//    Base 10 conversion:
//       -9223372036854775808     -->  0x-9223372036854775808
//       -193275430               -->  0x-193275430
//       -13621                   -->  0x-13621
//       -18                      -->  0x-18
//       12                       -->  0x12
//       1914206117               -->  0x1914206117
//       9223372036854775807      -->  0x9223372036854775807
//    Base 16 conversion:
//       -9223372036854775808     -->  0x8000000000000000
//       -193275430               -->  0xfffffffff47ad9da
//       -13621                   -->  0xffffffffffffcacb
//       -18                      -->  0xffffffffffffffee
//       12                       -->  0xc
//       1914206117               -->  0x721877a5
//       9223372036854775807      -->  0x7fffffffffffffff

let bases = [| 2; 8; 10; 16 |]
let numbers =
    [| Int64.MinValue; -193275430; -13621; -18; 12; 1914206117; Int64.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        printfn $"   {number,-23}  -->  0x{Convert.ToString(number, baseValue)}"
// The example displays the following output:
//    Base 2 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//       12                       -->  0x1100
//       1914206117               -->  0x1110010000110000111011110100101
//       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
//    Base 8 conversion:
//       -9223372036854775808     -->  0x1000000000000000000000
//       -193275430               -->  0x1777777777776436554732
//       -13621                   -->  0x1777777777777777745313
//       -18                      -->  0x1777777777777777777756
//       12                       -->  0x14
//       1914206117               -->  0x16206073645
//       9223372036854775807      -->  0x777777777777777777777
//    Base 10 conversion:
//       -9223372036854775808     -->  0x-9223372036854775808
//       -193275430               -->  0x-193275430
//       -13621                   -->  0x-13621
//       -18                      -->  0x-18
//       12                       -->  0x12
//       1914206117               -->  0x1914206117
//       9223372036854775807      -->  0x9223372036854775807
//    Base 16 conversion:
//       -9223372036854775808     -->  0x8000000000000000
//       -193275430               -->  0xfffffffff47ad9da
//       -13621                   -->  0xffffffffffffcacb
//       -18                      -->  0xffffffffffffffee
//       12                       -->  0xc
//       1914206117               -->  0x721877a5
//       9223372036854775807      -->  0x7fffffffffffffff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Long = { Int64.MinValue, -193275430, -13621, -18, 12, _
                             1914206117, Int64.MaxValue }

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Long In numbers
      Console.WriteLine("   {0,-23}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'    Base 2 conversion:
'       -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
'       -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
'       -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
'       -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
'       12                       -->  0x1100
'       1914206117               -->  0x1110010000110000111011110100101
'       9223372036854775807      -->  0x111111111111111111111111111111111111111111111111111111111111111
'    Base 8 conversion:
'       -9223372036854775808     -->  0x1000000000000000000000
'       -193275430               -->  0x1777777777776436554732
'       -13621                   -->  0x1777777777777777745313
'       -18                      -->  0x1777777777777777777756
'       12                       -->  0x14
'       1914206117               -->  0x16206073645
'       9223372036854775807      -->  0x777777777777777777777
'    Base 10 conversion:
'       -9223372036854775808     -->  0x-9223372036854775808
'       -193275430               -->  0x-193275430
'       -13621                   -->  0x-13621
'       -18                      -->  0x-18
'       12                       -->  0x12
'       1914206117               -->  0x1914206117
'       9223372036854775807      -->  0x9223372036854775807
'    Base 16 conversion:
'       -9223372036854775808     -->  0x8000000000000000
'       -193275430               -->  0xfffffffff47ad9da
'       -13621                   -->  0xffffffffffffcacb
'       -18                      -->  0xffffffffffffffee
'       12                       -->  0xc
'       1914206117               -->  0x721877a5
'       9223372036854775807      -->  0x7fffffffffffffff

let bases = [2; 8; 10; 16]
let numbers = [ Int64.MinValue; -193275430L; -13621L; -18L; 12L; 1914206117L; Int64.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -23i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//        -9223372036854775808     -->  0x1000000000000000000000000000000000000000000000000000000000000000
//        -193275430               -->  0x1111111111111111111111111111111111110100011110101101100111011010
//        -13621                   -->  0x1111111111111111111111111111111111111111111111111100101011001011
//        -18                      -->  0x1111111111111111111111111111111111111111111111111111111111101110
//         12                      -->  0x1100
//         1914206117              -->  0x1110010000110000111011110100101
//         9223372036854775807     -->  0x111111111111111111111111111111111111111111111111111111111111111
//     Base 8 conversion:
//        -9223372036854775808     -->  0x1000000000000000000000
//        -193275430               -->  0x1777777777776436554732
//        -13621                   -->  0x1777777777777777745313
//        -18                      -->  0x1777777777777777777756
//         12                      -->  0x14
//         1914206117              -->  0x16206073645
//         9223372036854775807     -->  0x777777777777777777777
//     Base 10 conversion:
//        -9223372036854775808     -->  0x-9223372036854775808
//        -193275430               -->  0x-193275430
//        -13621                   -->  0x-13621
//        -18                      -->  0x-18
//         12                      -->  0x12
//         1914206117              -->  0x1914206117
//         9223372036854775807     -->  0x9223372036854775807
//     Base 16 conversion:
//        -9223372036854775808     -->  0x8000000000000000
//        -193275430               -->  0xfffffffff47ad9da
//        -13621                   -->  0xffffffffffffcacb
//        -18                      -->  0xffffffffffffffee
//         12                      -->  0xc
//         1914206117              -->  0x721877a5
//         9223372036854775807     -->  0x7fffffffffffffff

備註

若 value 為正且 toBase 非 10，則返回字串使用符號與大小表示法。若 value 為負 toBase 且非10，則回傳字串使用二的補數表示法。這表示最高階位元組（位元 63）的高階位元被解釋為符號位元。若 ToString(Int64, Int32) 呼叫該方法來建立一個字串，之後會再轉換回數字，則應呼叫一個假設類似數值表示的方法來執行轉換。這類方法包括 Convert.ToInt64(String, Int32) 和 Int64.Parse(String, NumberStyles)。

適用於

ToString(Byte, Int32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將 8 位元無符號整數的值轉換為指定基底下的等效字串表示。

public:
 static System::String ^ ToString(System::Byte value, int toBase);

public static string ToString(byte value, int toBase);

static member ToString : byte * int -> string

Public Shared Function ToString (value As Byte, toBase As Integer) As String

參數

value: Byte

要轉換的是 8 位元無符號整數。

toBase: Int32

返回值的底數，必須是2、8、10或16。

傳回

String

在基底 value中的toBase串表示。

例外狀況

ArgumentException

toBase 不是2、8、10或16。

範例

以下範例將位元組陣列中的每個元素轉換為其等效的二進位、十六進位、十進位及十六進位字串表示。

int[] bases = { 2, 8, 10, 16};
byte[] numbers = { Byte.MinValue, 12, 103, Byte.MaxValue};

foreach (int baseValue in bases)
{
   Console.WriteLine("Base {0} conversion:", baseValue);
   foreach (byte number in numbers)
   {
      Console.WriteLine("   {0,-5}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue));
   }
}
// The example displays the following output:
//       Base 2 conversion:
//          0      -->  0x0
//          12     -->  0x1100
//          103    -->  0x1100111
//          255    -->  0x11111111
//       Base 8 conversion:
//          0      -->  0x0
//          12     -->  0x14
//          103    -->  0x147
//          255    -->  0x377
//       Base 10 conversion:
//          0      -->  0x0
//          12     -->  0x12
//          103    -->  0x103
//          255    -->  0x255
//       Base 16 conversion:
//          0      -->  0x0
//          12     -->  0xc
//          103    -->  0x67
//          255    -->  0xff

let bases = [| 2; 8; 10; 16 |]
let numbers = [| Byte.MinValue; 12uy; 103uy; Byte.MaxValue |]

for baseValue in bases do
    printfn $"Base {baseValue} conversion:"
    for number in numbers do
        Console.WriteLine("   {0,-5}  -->  0x{1}",
                        number, Convert.ToString(number, baseValue))
// The example displays the following output:
//       Base 2 conversion:
//          0      -->  0x0
//          12     -->  0x1100
//          103    -->  0x1100111
//          255    -->  0x11111111
//       Base 8 conversion:
//          0      -->  0x0
//          12     -->  0x14
//          103    -->  0x147
//          255    -->  0x377
//       Base 10 conversion:
//          0      -->  0x0
//          12     -->  0x12
//          103    -->  0x103
//          255    -->  0x255
//       Base 16 conversion:
//          0      -->  0x0
//          12     -->  0xc
//          103    -->  0x67
//          255    -->  0xff

Dim bases() As Integer = { 2, 8, 10, 16}
Dim numbers() As Byte = { Byte.MinValue, 12, 103, Byte.MaxValue}

For Each base As Integer In bases
   Console.WriteLine("Base {0} conversion:", base)
   For Each number As Byte In numbers
      Console.WriteLine("   {0,-5}  -->  0x{1}", _
                        number, Convert.ToString(number, base))
   Next
Next
' The example displays the following output:
'       Base 2 conversion:
'          0      -->  0x0
'          12     -->  0x1100
'          103    -->  0x1100111
'          255    -->  0x11111111
'       Base 8 conversion:
'          0      -->  0x0
'          12     -->  0x14
'          103    -->  0x147
'          255    -->  0x377
'       Base 10 conversion:
'          0      -->  0x0
'          12     -->  0x12
'          103    -->  0x103
'          255    -->  0x255
'       Base 16 conversion:
'          0      -->  0x0
'          12     -->  0xc
'          103    -->  0x67
'          255    -->  0xff

let bases = [2; 8; 10; 16]
let numbers = [ Byte.MinValue; 12uy; 103uy; Byte.MaxValue ]

for baseValue in bases do
    printfn "Base %i conversion:" baseValue
    for number in numbers do
        printfn "   % -5i  -->  0x%s" number (Convert.ToString (number, baseValue))
// The example displays the following output:
//     Base 2 conversion:
//         0     -->  0x0
//         12    -->  0x1100
//         103   -->  0x1100111
//         255   -->  0x11111111
//     Base 8 conversion:
//         0     -->  0x0
//         12    -->  0x14
//         103   -->  0x147
//         255   -->  0x377
//     Base 10 conversion:
//         0     -->  0x0
//         12    -->  0x12
//         103   -->  0x103
//         255   -->  0x255
//     Base 16 conversion:
//         0     -->  0x0
//         12    -->  0xc
//         103   -->  0x67
//         255   -->  0xff

備註

若 toBase 不等於 10，則該方法回傳 Convert.ToString(Byte, Int32) 的字串僅以其大小表示 value 。若呼叫該方法來建立字串，該字串稍後會被轉換回數字，則應呼叫一個假設僅以大小表示的對應方法來執行轉換。此類方法包括 Convert.ToByte(String, Int32) 或 Byte.Parse(String, NumberStyles)。

適用於

ToString(Byte, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 8 位元無符號整數值轉換為其等效字串表示，並使用指定的文化特定格式資訊。

public:
 static System::String ^ ToString(System::Byte value, IFormatProvider ^ provider);

public static string ToString(byte value, IFormatProvider provider);

public static string ToString(byte value, IFormatProvider? provider);

static member ToString : byte * IFormatProvider -> string

Public Shared Function ToString (value As Byte, provider As IFormatProvider) As String

參數

value: Byte

要轉換的是 8 位元無符號整數。

provider: IFormatProvider

物件，提供特定文化特性的格式資訊。

傳回

String

的 value字串表示。

範例

以下範例利用 en-US 與 fr-FR 文化的格式慣例，將無符號位元組陣列中的每個元素轉換為其等效字串表示法。由於「G」指定符預設只會輸出位元組值字串表示中的小數位，因此該 provider 參數不會影響回傳字串的格式化。

byte[] numbers = { 12, 100, Byte.MaxValue };
// Define the culture names used to display them.
string[] cultureNames = { "en-US", "fr-FR" };

foreach (byte number in numbers)
{
   Console.WriteLine("{0}:", Convert.ToString(number,
                             System.Globalization.CultureInfo.InvariantCulture));
   foreach (string cultureName in cultureNames)
   {
      System.Globalization.CultureInfo culture = new System.Globalization.CultureInfo(cultureName);
      Console.WriteLine("   {0}: {1,20}",
                        culture.Name, Convert.ToString(number, culture));
   }
   Console.WriteLine();
}
// The example displays the following output:
//       12:
//          en-US:                   12
//          fr-FR:                   12
//
//       100:
//          en-US:                  100
//          fr-FR:                  100
//
//       255:
//          en-US:                  255
//          fr-FR:                  255

let numbers = [| 12uy; 100uy; Byte.MaxValue |]
// Define the culture names used to display them.
let cultureNames = [| "en-US"; "fr-FR" |]

for number in numbers do
    printfn $"{Convert.ToString(number, CultureInfo.InvariantCulture)}:"
    for cultureName in cultureNames do
        let culture = CultureInfo cultureName
        printfn $"   {culture.Name}: {Convert.ToString(number, culture),20}"
    printfn ""
// The example displays the following output:
//       12:
//          en-US:                   12
//          fr-FR:                   12
//
//       100:
//          en-US:                  100
//          fr-FR:                  100
//
//       255:
//          en-US:                  255
//          fr-FR:                  255

' Define an array of numbers to display.
Dim numbers() As Byte = { 12, 100, Byte.MaxValue }
' Define the culture names used to display them.
Dim cultureNames() As String = { "en-US", "fr-FR" }

For Each number As Byte In numbers
   Console.WriteLine("{0}:", Convert.ToString(number, _
                             System.Globalization.CultureInfo.InvariantCulture))
   For Each cultureName As String In cultureNames
      Dim culture As New System.Globalization.CultureInfo(cultureName)
      Console.WriteLine("   {0}: {1,20}", _
                        culture.Name, Convert.ToString(number, culture))
   Next
   Console.WriteLine()
Next   
' The example displays the following output:
'       12:
'          en-US:                   12
'          fr-FR:                   12
'       
'       100:
'          en-US:                  100
'          fr-FR:                  100
'       
'       255:
'          en-US:                  255
'          fr-FR:                  255

備註

此實作與 Byte.ToString完全相同。

適用於

ToString(Boolean, IFormatProvider)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的布林值轉換為其等價的字串表示。

public:
 static System::String ^ ToString(bool value, IFormatProvider ^ provider);

public static string ToString(bool value, IFormatProvider provider);

public static string ToString(bool value, IFormatProvider? provider);

static member ToString : bool * IFormatProvider -> string

Public Shared Function ToString (value As Boolean, provider As IFormatProvider) As String

參數

value: Boolean

轉換時的布林值。

provider: IFormatProvider

一個物件的實例。這個參數已忽略。

傳回

String

的 value字串表示。

範例

以下範例使用 Boolean 該方法將值轉換為 a StringToString ，並使用 IFormatProvider 一個物件顯示該值所呼叫的格式提供者型別。範例顯示該 IFormatProvider 物件並未被參考。

// Example of Convert.ToString( non-numeric types, IFormatProvider ).
using System;
using System.Globalization;

// An instance of this class can be passed to methods that require
// an IFormatProvider.
public class DummyProvider : IFormatProvider
{
    // Normally, GetFormat returns an object of the requested type
    // (usually itself) if it is able; otherwise, it returns Nothing.
    public object GetFormat( Type argType )
    {
        // Here, the type of argType is displayed, and GetFormat
        // always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) );
        return null;
    }
}

class ConvertNonNumericProviderDemo
{
    static void Main( )
    {
        // Create an instance of the IFormatProvider.
        DummyProvider provider = new DummyProvider( );
        string converted;

        // Convert these values using DummyProvider.
        int      Int32A     = -252645135;
        double   DoubleA    = 61680.3855;
        object   ObjDouble  = (object)( -98765.4321 );
        DateTime DayTimeA   = new DateTime( 2001, 9, 11, 13, 45, 0 );

        bool     BoolA      = true;
        string   StringA    = "Qwerty";
        char     CharA      = '$';
        TimeSpan TSpanA     = new TimeSpan( 0, 18, 0 );
        object   ObjOther   = (object)provider;

        Console.WriteLine( "This example of " +
            "Convert.ToString( non-numeric, IFormatProvider ) \n" +
            "generates the following output. The provider type, " +
            "argument type, \nand argument value are displayed." );
        Console.WriteLine( "\nNote: The IFormatProvider object is " +
            "not called for Boolean, String, \nChar, TimeSpan, " +
            "and non-numeric Object." );

        // The format provider is called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( Int32A, provider );
        Console.WriteLine( "int      {0}", converted );
        converted = Convert.ToString( DoubleA, provider );
        Console.WriteLine( "double   {0}", converted );
        converted = Convert.ToString( ObjDouble, provider );
        Console.WriteLine( "object   {0}", converted );
        converted = Convert.ToString( DayTimeA, provider );
        Console.WriteLine( "DateTime {0}", converted );

        // The format provider is not called for these conversions.
        Console.WriteLine( );
        converted = Convert.ToString( BoolA, provider );
        Console.WriteLine( "bool     {0}", converted );
        converted = Convert.ToString( StringA, provider );
        Console.WriteLine( "string   {0}", converted );
        converted = Convert.ToString( CharA, provider );
        Console.WriteLine( "char     {0}", converted );
        converted = Convert.ToString( TSpanA, provider );
        Console.WriteLine( "TimeSpan {0}", converted );
        converted = Convert.ToString( ObjOther, provider );
        Console.WriteLine( "object   {0}", converted );
    }
}

/*
This example of Convert.ToString( non-numeric, IFormatProvider )
generates the following output. The provider type, argument type,
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String,
Char, TimeSpan, and non-numeric Object.

System.Globalization.NumberFormatInfo   int      -252645135
System.Globalization.NumberFormatInfo   double   61680.3855
System.Globalization.NumberFormatInfo   object   -98765.4321
System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM

bool     True
string   Qwerty
char     $
TimeSpan 00:18:00
object   DummyProvider

*/

// Example of Convert.ToString(non-numeric types, IFormatProvider).
open System
open System.Globalization

// Create an instance of the IFormatProvider with an object expression.
let provider =
    { new IFormatProvider with
        // Normally, GetFormat returns an object of the requested type
        // (usually itself) if it is able; otherwise, it returns Nothing.
        member _.GetFormat(argType: Type) =
            // Here, the type of argType is displayed, and GetFormat
            // always returns Nothing.
            printf $"{argType,-40}"
            null 
    }

// Convert these values using DummyProvider.
let Int32A     = -252645135
let DoubleA    = 61680.3855
let ObjDouble  = -98765.4321 :> obj
let DayTimeA   = DateTime(2001, 9, 11, 13, 45, 0)

let BoolA      = true
let StringA    = "Qwerty"
let CharA      = '$'
let TSpanA     = TimeSpan(0, 18, 0)
let ObjOther   = provider :> obj

[<EntryPoint>]
let main _ =
    printfn
        """This example of Convert.ToString(non-numeric, IFormatProvider) 
generates the following output. The provider type, argument type, 
and argument value are displayed.

Note: The IFormatProvider object is not called for Boolean, String, 
Char, TimeSpan, and non-numeric Object."""

    // The format provider is called for these conversions.
    printfn ""
    let converted = Convert.ToString(Int32A, provider)
    printfn $"int      {converted}"
    let converted = Convert.ToString(DoubleA, provider)
    printfn $"double   {converted}"
    let converted = Convert.ToString(ObjDouble, provider)
    printfn $"object   {converted}"
    let converted = Convert.ToString(DayTimeA, provider)
    printfn $"DateTime {converted}"

    // The format provider is not called for these conversions.
    printfn ""
    let converted = Convert.ToString(BoolA, provider)
    printfn $"bool     {converted}"
    let converted = Convert.ToString(StringA, provider)
    printfn $"string   {converted}"
    let converted = Convert.ToString(CharA, provider)
    printfn $"char     {converted}"
    let converted = Convert.ToString(TSpanA, provider)
    printfn $"TimeSpan {converted}"
    let converted = Convert.ToString(ObjOther, provider)
    printfn $"object   {converted}"

    0

// This example of Convert.ToString(non-numeric, IFormatProvider)
// generates the following output. The provider type, argument type,
// and argument value are displayed.
//
// Note: The IFormatProvider object is not called for Boolean, String,
// Char, TimeSpan, and non-numeric Object.
//
// System.Globalization.NumberFormatInfo   int      -252645135
// System.Globalization.NumberFormatInfo   double   61680.3855
// System.Globalization.NumberFormatInfo   object   -98765.4321
// System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
//
// bool     True
// string   Qwerty
// char     $
// TimeSpan 00:18:00
// object   DummyProvider

' Example of Convert.ToString( non-numeric types, IFormatProvider ).
Imports System.Globalization

' An instance of this class can be passed to methods that require 
' an IFormatProvider.
Public Class DummyProvider
    Implements IFormatProvider

    ' Normally, GetFormat returns an object of the requested type
    ' (usually itself) if it is able; otherwise, it returns Nothing. 
    Public Function GetFormat( argType As Type ) As Object _
        Implements IFormatProvider.GetFormat

        ' Here, the type of argType is displayed, and GetFormat
        ' always returns Nothing.
        Console.Write( "{0,-40}", argType.ToString( ) )
        Return Nothing

    End Function 
End Class

Module ConvertNonNumericProviderDemo

    Sub Main( )

        ' Create an instance of the IFormatProvider.
        Dim provider    As New DummyProvider( )
        Dim converted   As String

        ' Convert these values using DummyProvider.
        Dim Int32A      As Integer  = -252645135   
        Dim DoubleA     As Double   = 61680.3855
        Dim ObjDouble   As Object   = CType( -98765.4321, Object )
        Dim DayTimeA    As DateTime = _
                            new DateTime( 2001, 9, 11, 13, 45, 0 )

        Dim BoolA       As Boolean  = True
        Dim StringA     As String   = "Qwerty"
        Dim CharA       As Char     = "$"c
        Dim TSpanA      As TimeSpan = New TimeSpan( 0, 18, 0 )
        Dim ObjOther    As Object   = CType( provider, Object )

        Console.WriteLine( "This example of " & _
            "Convert.ToString( non-numeric, IFormatProvider ) " & _
            vbCrLf & "generates the following output. The " & _
            "provider type, argument type, " & vbCrLf & "and " & _
            "argument value are displayed." )
        Console.WriteLine( vbCrLf & _
            "Note: The IFormatProvider object is not called for " & _
            "Boolean, String, " & vbCrLf & "Char, TimeSpan, " & _
            "and non-numeric Object." )

        ' The format provider is called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( Int32A, provider )
        Console.WriteLine( "Int32    {0}", converted )
        converted =  Convert.ToString( DoubleA, provider )
        Console.WriteLine( "Double   {0}", converted )
        converted =  Convert.ToString( ObjDouble, provider )
        Console.WriteLine( "Object   {0}", converted )
        converted =  Convert.ToString( DayTimeA, provider )
        Console.WriteLine( "DateTime {0}", converted )

        ' The format provider is not called for these conversions.
        Console.WriteLine( )
        converted =  Convert.ToString( BoolA, provider )
        Console.WriteLine( "Boolean  {0}", converted )
        converted =  Convert.ToString( StringA, provider )
        Console.WriteLine( "String   {0}", converted )
        converted =  Convert.ToString( CharA, provider )
        Console.WriteLine( "Char     {0}", converted )
        converted =  Convert.ToString( TSpanA, provider )
        Console.WriteLine( "TimeSpan {0}", converted )
        converted =  Convert.ToString( ObjOther, provider )
        Console.WriteLine( "Object   {0}", converted )

    End Sub
End Module

' This example of Convert.ToString( non-numeric, IFormatProvider )
' generates the following output. The provider type, argument type,
' and argument value are displayed.
'
' Note: The IFormatProvider object is not called for Boolean, String,
' Char, TimeSpan, and non-numeric Object.
' 
' System.Globalization.NumberFormatInfo   Int32    -252645135
' System.Globalization.NumberFormatInfo   Double   61680.3855
' System.Globalization.NumberFormatInfo   Object   -98765.4321
' System.Globalization.DateTimeFormatInfo DateTime 9/11/2001 1:45:00 PM
' 
' Boolean  True
' String   Qwerty
' Char     $
' TimeSpan 00:18:00
' Object   DummyProvider

備註

此實作與 Boolean.ToString完全相同。它會回傳Boolean.TrueString值和Boolean.FalseStringtrue值false值。

適用於

ToString(Boolean)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的布林值轉換為其等價的字串表示。

public:
 static System::String ^ ToString(bool value);

public static string ToString(bool value);

static member ToString : bool -> string

Public Shared Function ToString (value As Boolean) As String

參數

value: Boolean

轉換時的布林值。

傳回

String

的 value字串表示。

範例

以下範例說明將 a Boolean 轉換為 String，使用 ToString。同時也說明了換算回傳的字串等於 Boolean.TrueString 或 Boolean.FalseString。

bool falseFlag = false;
bool trueFlag = true;

Console.WriteLine(Convert.ToString(falseFlag));
Console.WriteLine(Convert.ToString(falseFlag).Equals(Boolean.FalseString));
Console.WriteLine(Convert.ToString(trueFlag));
Console.WriteLine(Convert.ToString(trueFlag).Equals(Boolean.TrueString));
// The example displays the following output:
//       False
//       True
//       True
//       True

let falseFlag = false
let trueFlag = true

printfn $"{Convert.ToString falseFlag}"
printfn $"{Convert.ToString(falseFlag).Equals Boolean.FalseString}"
printfn $"{Convert.ToString trueFlag}"
printfn $"{Convert.ToString(trueFlag).Equals(Boolean.TrueString)}"
// The example displays the following output:
//       False
//       True
//       True
//       True

Dim falseFlag As Boolean = False
Dim trueFlag As Boolean = True

Console.WriteLine(Convert.ToString(falseFlag))
Console.WriteLine(Convert.ToString(falseFlag).Equals(Boolean.FalseString))
Console.WriteLine(Convert.ToString(trueFlag))
Console.WriteLine(Convert.ToString(trueFlag).Equals(Boolean.TrueString))
' The example displays the following output:
'       False
'       True
'       True
'       True

let falseFlag = false
let trueFlag = true

Console.WriteLine (Convert.ToString falseFlag)
Console.WriteLine (Convert.ToString falseFlag=Boolean.FalseString)
Console.WriteLine (Convert.ToString trueFlag)
Console.WriteLine (Convert.ToString trueFlag=Boolean.TrueString)
// The example displays the following output:
//       False
//       True
//       True
//       True

備註

此實作與 Boolean.ToString完全相同。它會回傳Boolean.TrueString值和Boolean.FalseStringtrue值false值。

適用於

ToString(Byte)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定 8 位元無符號整數的值轉換為其等價字串表示。

public:
 static System::String ^ ToString(System::Byte value);

public static string ToString(byte value);

static member ToString : byte -> string

Public Shared Function ToString (value As Byte) As String

參數

value: Byte

要轉換的是 8 位元無符號整數。

傳回

String

的 value字串表示。

範例

以下範例將陣列中的 Byte 每個值轉換成字串。

using System;

public class Example
{
   public static void Main()
   {
      byte[] values = { Byte.MinValue, 12, 100, 179, Byte.MaxValue } ;

      foreach (var value in values)
         Console.WriteLine("{0,3} ({1}) --> {2}", value,
                           value.GetType().Name,
                           Convert.ToString(value));
   }
}
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255

open System

let values = 
   [| Byte.MinValue; 12uy; 100uy; 179uy; Byte.MaxValue |]

for value in values do
   printfn $"{value,3} ({value.GetType().Name}) --> {Convert.ToString value}"
                     
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255

Public Module Example
   Public Sub Main()
      Dim values() As Byte = { Byte.MinValue, 12, 100, 179, Byte.MaxValue }

      For Each value In values
         Console.WriteLine("{0,3} ({1}) --> {2}", value, 
                           value.GetType().Name, 
                           Convert.ToString(value))
      Next                           
   End Sub
End Module
' The example displays the following output:
'       0 (Byte) --> 0
'      12 (Byte) --> 12
'     100 (Byte) --> 100
'     179 (Byte) --> 179
'     255 (Byte) --> 255

let values = [ Byte.MinValue; 12uy; 100uy; 179uy; Byte.MaxValue ]
for value in values do
    printfn "% 4i (%s) --> %s" value (value.GetType().Name) (Convert.ToString value)
// The example displays the following output:
//       0 (Byte) --> 0
//      12 (Byte) --> 12
//     100 (Byte) --> 100
//     179 (Byte) --> 179
//     255 (Byte) --> 255

備註

此實作與 Byte.ToString()完全相同。

適用於

ToString(Char)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 Unicode 字元值轉換為其等效字串表示。

public:
 static System::String ^ ToString(char value);

public static string ToString(char value);

static member ToString : char -> string

Public Shared Function ToString (value As Char) As String

參數

value: Char

要轉換的 Unicode 字元。

傳回

String

的 value字串表示。

範例

以下範例將 a Char String轉換為。

public void ConvertStringChar(string stringVal) {
    char charVal = 'a';

    // A string must be one character long to convert to char.
    try {
        charVal = System.Convert.ToChar(stringVal);
        System.Console.WriteLine("{0} as a char is {1}",
            stringVal, charVal);
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string is longer than one character.");
    }
    catch (System.ArgumentNullException) {
        System.Console.WriteLine("The string is null.");
    }

    // A char to string conversion will always succeed.
    stringVal = System.Convert.ToString(charVal);
    System.Console.WriteLine("The character as a string is {0}",
            stringVal);
}

let convertStringChar (stringVal: string) =
    let charVal = 'a'

    // A string must be one character long to convert to char.
    try
        let charVal = Convert.ToChar stringVal
        printfn $"{stringVal} as a char is {charVal}"
    with
    | :? FormatException ->
        printfn "The string is longer than one character."
    | :? ArgumentNullException ->
        printfn "The string is null."

    // A char to string conversion will always succeed.
    let stringVal = Convert.ToString charVal
    printfn $"The character as a string is {stringVal}"

Public Sub ConvertStringChar(ByVal stringVal As String)
    Dim charVal As Char = "a"c

    ' A string must be one character long to convert to char.
    Try
        charVal = System.Convert.ToChar(stringVal)
        System.Console.WriteLine("{0} as a char is {1}", _
                                  stringVal, charVal)
    Catch exception As System.FormatException
        System.Console.WriteLine( _
         "The string is longer than one character.")
    Catch exception As System.ArgumentNullException
        System.Console.WriteLine("The string is null.")
    End Try

    ' A char to string conversion will always succeed.
    stringVal = System.Convert.ToString(charVal)
    System.Console.WriteLine("The character as a string is {0}", _
                              stringVal)
End Sub

備註

此實作與 Char.ToString完全相同。

適用於

ToString(DateTime)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 DateTime 值轉換為其等價的字串表示。

public:
 static System::String ^ ToString(DateTime value);

public static string ToString(DateTime value);

static member ToString : DateTime -> string

Public Shared Function ToString (value As DateTime) As String

參數

value: DateTime

轉換的日期和時間值。

傳回

String

的 value字串表示。

範例

以下範例將一個值陣列 DateTime 中的每個元素轉換為一個 String 值。

DateTime[] dates = { new DateTime(2009, 7, 14),
                     new DateTime(1, 1, 1, 18, 32, 0),
                     new DateTime(2009, 2, 12, 7, 16, 0) };
string result;

foreach (DateTime dateValue in dates)
{
   result = Convert.ToString(dateValue);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        dateValue.GetType().Name, dateValue,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
//    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
//    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.

let dates =
    [| DateTime(2009, 7, 14)
       DateTime(1, 1, 1, 18, 32, 0)
       DateTime(2009, 2, 12, 7, 16, 0) |]

for dateValue in dates do
    let result = Convert.ToString dateValue
    printfn $"Converted the {dateValue.GetType().Name} value {dateValue} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
//    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
//    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.

Dim dates() As Date = { #07/14/2009#, #6:32PM#, #02/12/2009 7:16AM#}
Dim result As String

For Each dateValue As Date In dates
   result = Convert.ToString(dateValue)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        dateValue.GetType().Name, dateValue, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the DateTime value 7/14/2009 12:00:00 AM to a String value 7/14/2009 12:00:00 AM.
'    Converted the DateTime value 1/1/0001 06:32:00 PM to a String value 1/1/0001 06:32:00 PM.
'    Converted the DateTime value 2/12/2009 07:16:00 AM to a String value 2/12/2009 07:16:00 AM.

備註

此實作與 DateTime.ToString()完全相同。它使用當前文化的格式慣例與「G」格式指定符，將值轉換為 DateTime 字串表示。

適用於

ToString(Double)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的雙精度浮點數值轉換為其等效字串表示。

public:
 static System::String ^ ToString(double value);

public static string ToString(double value);

static member ToString : double -> string

Public Shared Function ToString (value As Double) As String

參數

value: Double

要轉換的雙精度浮點數。

傳回

String

的 value字串表示。

範例

以下範例將 a Double String轉換為。

public void ConvertDoubleString(double doubleVal) {
    
    string	stringVal;

    // A conversion from Double to string cannot overflow.
    stringVal = System.Convert.ToString(doubleVal);
    System.Console.WriteLine("{0} as a string is: {1}",
        doubleVal, stringVal);

    try {
        doubleVal = System.Convert.ToDouble(stringVal);
        System.Console.WriteLine("{0} as a double is: {1}",
            stringVal, doubleVal);
    }
    catch (System.OverflowException) {
        System.Console.WriteLine(
            "Conversion from string-to-double overflowed.");
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string was not formatted as a double.");
    }
    catch (System.ArgumentException) {
        System.Console.WriteLine(
            "The string pointed to null.");
    }
}

let convertDoubleString (doubleVal: float) =
    // A conversion from Double to string cannot overflow.
    let stringVal = Convert.ToString doubleVal
    printfn $"{doubleVal} as a string is: {stringVal}"

    try
        let doubleVal = Convert.ToDouble stringVal
        printfn $"{stringVal} as a double is: {doubleVal}"
    with
    | :? OverflowException ->
        printfn "Conversion from string-to-double overflowed."
    | :? FormatException ->
        printfn "The string was not formatted as a double."
    | :? ArgumentException ->
        printfn "The string pointed to null."

Public Sub ConvertDoubleString(ByVal doubleVal As Double)

    Dim stringVal As String

    ' A conversion from Double to String cannot overflow.       
    stringVal = System.Convert.ToString(doubleVal)
    System.Console.WriteLine("{0} as a String is: {1}", _
                              doubleVal, stringVal)

    Try
        doubleVal = System.Convert.ToDouble(stringVal)
        System.Console.WriteLine("{0} as a Double is: {1}", _
                                  stringVal, doubleVal)
    Catch exception As System.OverflowException
        System.Console.WriteLine( _
            "Overflow in String-to-Double conversion.")
    Catch exception As System.FormatException
        System.Console.WriteLine( _
            "The string is not formatted as a Double.")
    Catch exception As System.ArgumentException
        System.Console.WriteLine("The string is null.")
    End Try

End Sub

備註

此實作與 Double.ToString()完全相同。

適用於

ToString(Int16)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 16 位元有號整數值轉換為其等效字串表示。

public:
 static System::String ^ ToString(short value);

public static string ToString(short value);

static member ToString : int16 -> string

Public Shared Function ToString (value As Short) As String

參數

value: Int16

要轉換的16位帶正負號整數。

傳回

String

的 value字串表示。

範例

以下範例將 16 位元整數陣列中的每個元素轉換為其等價的字串表示法。

short[] numbers = { Int16.MinValue, -138, 0, 19, Int16.MaxValue };
string result;

foreach (short number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Int16 value -32768 to the String value -32768.
//    Converted the Int16 value -138 to the String value -138.
//    Converted the Int16 value 0 to the String value 0.
//    Converted the Int16 value 19 to the String value 19.
//    Converted the Int16 value 32767 to the String value 32767.

let numbers = [| Int16.MinValue; -138s; 0s; 19s; Int16.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the Int16 value -32768 to the String value -32768.
//    Converted the Int16 value -138 to the String value -138.
//    Converted the Int16 value 0 to the String value 0.
//    Converted the Int16 value 19 to the String value 19.
//    Converted the Int16 value 32767 to the String value 32767.

Dim numbers() As Short = { Int16.MinValue, -138, 0, 19, Int16.MaxValue }
Dim result As String

For Each number As Short In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next     
' The example displays the following output:
'    Converted the Int16 value -32768 to the String value -32768.
'    Converted the Int16 value -138 to the String value -138.
'    Converted the Int16 value 0 to the String value 0.
'    Converted the Int16 value 19 to the String value 19.
'    Converted the Int16 value 32767 to the String value 32767.

備註

此實作與 Int16.ToString()完全相同。

適用於

ToString(Int32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定 32 位元有符號整數的值轉換為其等價字串表示。

public:
 static System::String ^ ToString(int value);

public static string ToString(int value);

static member ToString : int -> string

Public Shared Function ToString (value As Integer) As String

參數

value: Int32

要轉換的32位帶正負號整數。

傳回

String

的 value字串表示。

範例

以下範例比較了該ToString(Int32)方法與該方法。ToString(UInt16, IFormatProvider) 它定義了一個自訂 NumberFormatInfo 物件，使用「減號」來表示負號。它會將整數陣列中的每個元素轉換為其等效的字串表示，使用預設格式（當前文化的格式慣例）及自訂格式提供者。

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      // Create a NumberFormatInfo object and set its NegativeSigns
      // property to use for integer formatting.
      NumberFormatInfo provider = new NumberFormatInfo();
      provider.NegativeSign = "minus ";

      int[] values = { -20, 0, 100 };

      Console.WriteLine("{0,-8} --> {1,10} {2,10}\n", "Value",
                         CultureInfo.CurrentCulture.Name,
                         "Custom");
      foreach (int value in values)
         Console.WriteLine("{0,-8} --> {1,10} {2,10}",
                           value, Convert.ToString(value),
                           Convert.ToString(value, provider));
      // The example displays output like the following:
      //       Value    -->      en-US     Custom
      //
      //       -20      -->        -20   minus 20
      //       0        -->          0          0
      //       100      -->        100        100
   }
}

open System
open System.Globalization

// Create a NumberFormatInfo object and set its NegativeSigns
// property to use for integer formatting.
let provider = NumberFormatInfo()
provider.NegativeSign <- "minus "

let values = [| -20; 0; 100 |]

printfn $"""{CultureInfo.CurrentCulture.Name,-8} --> {"Value",10} {"Custom",10}\n"""
                    
for value in values do
    printfn $"{value,-8} --> {Convert.ToString value,10} {Convert.ToString(value, provider),10}"
// The example displays output like the following:
//       Value    -->      en-US     Custom
//
//       -20      -->        -20   minus 20
//       0        -->          0          0
//       100      -->        100        100

Imports System.Globalization

Module Example
   Public Sub Main()
      ' Create a NumberFormatInfo object and set its NegativeSigns
      ' property to use for integer formatting.
      Dim provider As New NumberFormatInfo()
      provider.NegativeSign = "minus "

      Dim values() As Integer = { -20, 0, 100 }

      Console.WriteLine("{0,-8} --> {1,10} {2,10}", "Value",
                         CultureInfo.CurrentCulture.Name,
                         "Custom")
      Console.WriteLine()
      For Each value As Integer In values
         Console.WriteLine("{0,-8} --> {1,10} {2,10}",
                           value, Convert.ToString(value),
                           Convert.ToString(value, provider))
      Next
   End Sub
End Module
' The example displays output like the following:
'       Value    -->      en-US     Custom
'
'       -20      -->        -20   minus 20
'       0        -->          0          0
'       100      -->        100        100

備註

此實作與 Int32.ToString()完全相同。它採用當前文化的格式慣例來進行 value 格式化。

適用於

ToString(Decimal)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的十進位數值轉換為其等價的字串表示。

public:
 static System::String ^ ToString(System::Decimal value);

public static string ToString(decimal value);

static member ToString : decimal -> string

Public Shared Function ToString (value As Decimal) As String

參數

value: Decimal

用小數轉換。

傳回

String

的 value字串表示。

範例

以下範例將 a Decimal String轉換為。

public void ConvertStringDecimal(string stringVal) {
    decimal decimalVal = 0;
    
    try {
        decimalVal = System.Convert.ToDecimal(stringVal);
        System.Console.WriteLine(
            "The string as a decimal is {0}.", decimalVal);
    }
    catch (System.OverflowException){
        System.Console.WriteLine(
            "The conversion from string to decimal overflowed.");
    }
    catch (System.FormatException) {
        System.Console.WriteLine(
            "The string is not formatted as a decimal.");
    }
    catch (System.ArgumentNullException) {
        System.Console.WriteLine(
            "The string is null.");
    }

    // Decimal to string conversion will not overflow.
    stringVal = System.Convert.ToString(decimalVal);
    System.Console.WriteLine(
        "The decimal as a string is {0}.", stringVal);
}

let convertStringDecimal (stringVal: string) =
    let decimalVal = 0m

    try
        let decimalVal = Convert.ToDecimal(stringVal)
        printfn $"The string as a decimal is {decimalVal}."
    with
    | :? OverflowException ->
        printfn "The conversion from string to decimal overflowed."
    | :? FormatException ->
        printfn "The string is not formatted as a decimal."
    | :? ArgumentNullException ->
        printfn "The string is null."

    // Decimal to string conversion will not overflow.
    let stringVal = Convert.ToString decimalVal
    printfn $"The decimal as a string is {stringVal}."

Public Sub ConvertStringDecimal(ByVal stringVal As String)
    Dim decimalVal As Decimal = 0

    Try
        decimalVal = System.Convert.ToDecimal(stringVal)
        System.Console.WriteLine("The string as a decimal is {0}.", _
                                  decimalVal)
    Catch exception As System.OverflowException
        System.Console.WriteLine( _
            "Overflow in string-to-decimal conversion.")
    Catch exception As System.FormatException
        System.Console.WriteLine( _
            "The string is not formatted as a decimal.")
    Catch exception As System.ArgumentException
        System.Console.WriteLine("The string is null.")
    End Try

    ' Decimal to string conversion will not overflow.
    stringVal = System.Convert.ToString(decimalVal)
    System.Console.WriteLine("The decimal as a string is {0}.", _
                              stringVal)
End Sub

備註

此實作與 Decimal.ToString()完全相同。

適用於

ToString(Object)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定物件的值轉換為其等價的字串表示。

public:
 static System::String ^ ToString(System::Object ^ value);

public static string ToString(object value);

public static string? ToString(object? value);

static member ToString : obj -> string

Public Shared Function ToString (value As Object) As String

參數

value: Object

一個提供轉換值的物件，或 null。

傳回

String

若為 null，則的valuevalueEmpty字串表示。

範例

以下範例將物件陣列中的每個元素轉換為其等價的字串表示。

object[] values = { false, 12.63m, new DateTime(2009, 6, 1, 6, 32, 15), 16.09e-12,
                    'Z', 15.15322, SByte.MinValue, Int32.MaxValue };
string result;

foreach (object value in values)
{
   result = Convert.ToString(value);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        value.GetType().Name, value,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Boolean value False to the String value False.
//    Converted the Decimal value 12.63 to the String value 12.63.
//    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
//    Converted the Double value 1.609E-11 to the String value 1.609E-11.
//    Converted the Char value Z to the String value Z.
//    Converted the Double value 15.15322 to the String value 15.15322.
//    Converted the SByte value -128 to the String value -128.
//    Converted the Int32 value 2147483647 to the String value 2147483647.

let values: obj[] =
    [| false; 12.63m; DateTime(2009, 6, 1, 6, 32, 15)
       16.09e-12; 'Z'; 15.15322; SByte.MinValue; Int32.MaxValue |]

for value in values do
    let result = Convert.ToString value
    printfn $"Converted the {value.GetType().Name} value {value} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the Boolean value False to the String value False.
//    Converted the Decimal value 12.63 to the String value 12.63.
//    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
//    Converted the Double value 1.609E-11 to the String value 1.609E-11.
//    Converted the Char value Z to the String value Z.
//    Converted the Double value 15.15322 to the String value 15.15322.
//    Converted the SByte value -128 to the String value -128.
//    Converted the Int32 value 2147483647 to the String value 2147483647.

Dim values() As Object = { False, 12.63d, #06/01/2009 6:32:15#, 16.09e-12, _
                           "Z"c, 15.15322, SByte.MinValue, Int32.MaxValue}
Dim result As String

For Each value As Object In values
   result = Convert.ToString(value)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        value.GetType().Name, value, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the Boolean value False to the String value False.
'    Converted the Decimal value 12.63 to the String value 12.63.
'    Converted the DateTime value 6/1/2009 06:32:15 AM to the String value 6/1/2009 06:32:15 AM.
'    Converted the Double value 1.609E-11 to the String value 1.609E-11.
'    Converted the Char value Z to the String value Z.
'    Converted the Double value 15.15322 to the String value 15.15322.
'    Converted the SByte value -128 to the String value -128.
'    Converted the Int32 value 2147483647 to the String value 2147483647.

備註

為了轉換 value 成字串表示，方法嘗試呼叫 IConvertible.ToString 的 value實作。若 value 未實作介面， IConvertible 該方法嘗試呼叫 IFormattable.ToString 的 value實作。若值未實作介面， IFormattable 該方法呼叫 ToString 底層型別 value的方法。

適用於

ToString(SByte)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 8 位元有符號整數值轉換為其等價字串表示。

public:
 static System::String ^ ToString(System::SByte value);

[System.CLSCompliant(false)]
public static string ToString(sbyte value);

[<System.CLSCompliant(false)>]
static member ToString : sbyte -> string

Public Shared Function ToString (value As SByte) As String

參數

value: SByte

8位元有符號整數用於轉換。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例將有符號位元組陣列中的每個元素轉換為其等價的字串表示法。

sbyte[] numbers = { SByte.MinValue, -12, 0, 16, SByte.MaxValue };
string result;

foreach (sbyte number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the SByte value -128 to the String value -128.
//    Converted the SByte value -12 to the String value -12.
//    Converted the SByte value 0 to the String value 0.
//    Converted the SByte value 16 to the String value 16.
//    Converted the SByte value 127 to the String value 127.

let numbers = [| SByte.MinValue; -12y; 0y; 16y; SByte.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the SByte value -128 to the String value -128.
//    Converted the SByte value -12 to the String value -12.
//    Converted the SByte value 0 to the String value 0.
//    Converted the SByte value 16 to the String value 16.
//    Converted the SByte value 127 to the String value 127.

Dim numbers() As SByte = { SByte.MinValue, -12, 0, 16, SByte.MaxValue }
Dim result As String

For Each number As SByte In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the SByte value -128 to the String value -128.
'    Converted the SByte value -12 to the String value -12.
'    Converted the SByte value 0 to the String value 0.
'    Converted the SByte value 16 to the String value 16.
'    Converted the SByte value 127 to the String value 127.

備註

此實作與 SByte.ToString()完全相同。

適用於

ToString(Single)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的單精度浮點數值轉換為其等效字串表示。

public:
 static System::String ^ ToString(float value);

public static string ToString(float value);

static member ToString : single -> string

Public Shared Function ToString (value As Single) As String

參數

value: Single

要轉換的單精度浮點數。

傳回

String

的 value字串表示。

範例

以下範例將數值陣列 Single 中的每個元素轉換為其等價的字串表示法。

float[] numbers = { Single.MinValue, -1011.351f, -17.45f, -3e-16f,
                    0f, 4.56e-12f, 16.0001f, 10345.1221f, Single.MaxValue };
string result;

foreach (float number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
//    Converted the Single value -1011.351 to the String value -1011.351.
//    Converted the Single value -17.45 to the String value -17.45.
//    Converted the Single value -3E-16 to the String value -3E-16.
//    Converted the Single value 0 to the String value 0.
//    Converted the Single value 4.56E-12 to the String value 4.56E-12.
//    Converted the Single value 16.0001 to the String value 16.0001.
//    Converted the Single value 10345.12 to the String value 10345.12.
//    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.

let numbers = 
    [| Single.MinValue; -1011.351f; -17.45f; -3e-16f; 0f; 4.56e-12f; 16.0001f; 10345.1221f; Single.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
//    Converted the Single value -1011.351 to the String value -1011.351.
//    Converted the Single value -17.45 to the String value -17.45.
//    Converted the Single value -3E-16 to the String value -3E-16.
//    Converted the Single value 0 to the String value 0.
//    Converted the Single value 4.56E-12 to the String value 4.56E-12.
//    Converted the Single value 16.0001 to the String value 16.0001.
//    Converted the Single value 10345.12 to the String value 10345.12.
//    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.

Dim numbers() As Single = { Single.MinValue, -1011.351, -17.45, -3e-16, _
                            0, 4.56e-12, 16.0001, 10345.1221, Single.MaxValue }
Dim result As String

For Each number As Single In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next                            
' The example displays the following output:
'    Converted the Single value -3.402823E+38 to the String value -3.402823E+38.
'    Converted the Single value -1011.351 to the String value -1011.351.
'    Converted the Single value -17.45 to the String value -17.45.
'    Converted the Single value -3E-16 to the String value -3E-16.
'    Converted the Single value 0 to the String value 0.
'    Converted the Single value 4.56E-12 to the String value 4.56E-12.
'    Converted the Single value 16.0001 to the String value 16.0001.
'    Converted the Single value 10345.12 to the String value 10345.12.
'    Converted the Single value 3.402823E+38 to the String value 3.402823E+38.

備註

此實作與 Single.ToString()完全相同。

適用於

ToString(String)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

回傳指定的字串實例;並未進行實際的轉換。

public:
 static System::String ^ ToString(System::String ^ value);

public static string? ToString(string? value);

public static string ToString(string value);

static member ToString : string -> string

Public Shared Function ToString (value As String) As String

參數

value: String

那條線要回來。

傳回

String

value 未改變地返回。

範例

以下範例將一個字串傳給方法， ToString(String) 並呼叫該 Object.ReferenceEquals 方法以確認該方法回傳原始字串。範例也呼叫了 String.IsInterned 該方法，以確保兩字串不相同，因為原始字串已被內化。

using System;

public class Example
{
   public static void Main()
   {
      String article = "An";
      String noun = "apple";
      String str1 = String.Format("{0} {1}", article, noun);
      String str2 = Convert.ToString(str1);

      Console.WriteLine("str1 is interned: {0}",
                        ! (String.IsInterned(str1) == null));
      Console.WriteLine("str1 and str2 are the same reference: {0}",
                        Object.ReferenceEquals(str1, str2));
   }
}
// The example displays the following output:
//       str1 is interned: False
//       str1 and str2 are the same reference: True

open System

let article = "An"
let noun = "apple"
let str1 = $"{article} {noun}"
let str2 = Convert.ToString str1

printfn $"str1 is interned: {String.IsInterned str1 <> null}"
                  
printfn $"str1 and str2 are the same reference: {Object.ReferenceEquals(str1, str2)}"
// The example displays the following output:
//       str1 is interned: False
//       str1 and str2 are the same reference: True

Module Example
   Public Sub Main()
      Dim article As String = "An"
      Dim noun As String = "apple"
      Dim str1 As String = String.Format("{0} {1}", article, noun)
      Dim str2 As String = Convert.ToString(str1)

      Console.WriteLine("str1 is interned: {0}",
                        Not String.IsInterned(str1) Is Nothing)
      Console.WriteLine("str1 and str2 are the same reference: {0}",
                        Object.ReferenceEquals(str1, str2))
   End Sub
End Module
' The example displays the following output:
'       str1 is interned: False
'       str1 and str2 are the same reference: True

適用於

ToString(UInt16)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 16 位元無符號整數值轉換為其等價字串表示。

public:
 static System::String ^ ToString(System::UInt16 value);

[System.CLSCompliant(false)]
public static string ToString(ushort value);

[<System.CLSCompliant(false)>]
static member ToString : uint16 -> string

Public Shared Function ToString (value As UShort) As String

參數

value: UInt16

16位元無符號整數要轉換。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例將一個無符號 16 位元整數陣列中的每個元素轉換為其等價的字串表示法。

ushort[] numbers = { UInt16.MinValue, 103, 1045, UInt16.MaxValue };
string result;

foreach (ushort number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt16 value 0 to the String value 0.
//    Converted the UInt16 value 103 to the String value 103.
//    Converted the UInt16 value 1045 to the String value 1045.
//    Converted the UInt16 value 65535 to the String value 65535.

let numbers = [| UInt16.MinValue; 103us; 1045us; UInt16.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the UInt16 value 0 to the String value 0.
//    Converted the UInt16 value 103 to the String value 103.
//    Converted the UInt16 value 1045 to the String value 1045.
//    Converted the UInt16 value 65535 to the String value 65535.

Dim numbers() As UShort = { UInt16.MinValue, 103, 1045, UInt16.MaxValue }
Dim result As String

For Each number As UShort In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt16 value 0 to the String value 0.
'    Converted the UInt16 value 103 to the String value 103.
'    Converted the UInt16 value 1045 to the String value 1045.
'    Converted the UInt16 value 65535 to the String value 65535.

備註

此實作與 UInt16.ToString()完全相同。

適用於

ToString(UInt32)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定的 32 位元無符號整數值轉換為其等價字串表示。

public:
 static System::String ^ ToString(System::UInt32 value);

[System.CLSCompliant(false)]
public static string ToString(uint value);

[<System.CLSCompliant(false)>]
static member ToString : uint32 -> string

Public Shared Function ToString (value As UInteger) As String

參數

value: UInt32

32位元無符號整數要轉換。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例將無符號整數陣列中的每個元素轉換為其等價的字串表示法。

uint[] numbers = { UInt32.MinValue, 103, 1045, 119543, UInt32.MaxValue };
string result;

foreach (uint number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt32 value 0 to the String value 0.
//    Converted the UInt32 value 103 to the String value 103.
//    Converted the UInt32 value 1045 to the String value 1045.
//    Converted the UInt32 value 119543 to the String value 119543.
//    Converted the UInt32 value 4294967295 to the String value 4294967295.

let numbers = [| UInt32.MinValue; 103u; 1045u; 119543u; UInt32.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the UInt32 value 0 to the String value 0.
//    Converted the UInt32 value 103 to the String value 103.
//    Converted the UInt32 value 1045 to the String value 1045.
//    Converted the UInt32 value 119543 to the String value 119543.
//    Converted the UInt32 value 4294967295 to the String value 4294967295.

Dim numbers() As UInteger = { UInt32.MinValue, 103, 1045, 119543, UInt32.MaxValue }
Dim result As String

For Each number As UInteger In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt32 value 0 to the String value 0.
'    Converted the UInt32 value 103 to the String value 103.
'    Converted the UInt32 value 1045 to the String value 1045.
'    Converted the UInt32 value 119543 to the String value 119543.
'    Converted the UInt32 value 4294967295 to the String value 4294967295.

備註

此實作與 UInt32.ToString()完全相同。

適用於

ToString(UInt64)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

重要

此 API 不符合 CLS 規範。

將指定 64 位元無符號整數的值轉換為其等效字串表示。

public:
 static System::String ^ ToString(System::UInt64 value);

[System.CLSCompliant(false)]
public static string ToString(ulong value);

[<System.CLSCompliant(false)>]
static member ToString : uint64 -> string

Public Shared Function ToString (value As ULong) As String

參數

value: UInt64

64 位元無符號整數用於轉換。

傳回

String

的 value字串表示。

屬性: CLSCompliantAttribute

範例

以下範例將無符號長整數陣列中的每個元素轉換為其等價的字串表示。

ulong[] numbers = { UInt64.MinValue, 1031, 189045, UInt64.MaxValue };
string result;

foreach (ulong number in numbers)
{
   result = Convert.ToString(number);
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
}
// The example displays the following output:
//    Converted the UInt64 value 0 to the String value 0.
//    Converted the UInt64 value 1031 to the String value 1031.
//    Converted the UInt64 value 189045 to the String value 189045.
//    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.

let numbers = [| UInt64.MinValue; 1031uL; 189045uL; UInt64.MaxValue |]

for number in numbers do
    let result = Convert.ToString number
    printfn $"Converted the {number.GetType().Name} value {number} to the {result.GetType().Name} value {result}."
// The example displays the following output:
//    Converted the UInt64 value 0 to the String value 0.
//    Converted the UInt64 value 1031 to the String value 1031.
//    Converted the UInt64 value 189045 to the String value 189045.
//    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.

Dim numbers() As ULong = { UInt64.MinValue, 1031, 189045, UInt64.MaxValue }
Dim result As String

For Each number As ULong In numbers
   result = Convert.ToString(number)
   Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.", _
                        number.GetType().Name, number, _
                        result.GetType().Name, result)
Next
' The example displays the following output:
'    Converted the UInt64 value 0 to the String value 0.
'    Converted the UInt64 value 1031 to the String value 1031.
'    Converted the UInt64 value 189045 to the String value 189045.
'    Converted the UInt64 value 18446744073709551615 to the String value 18446744073709551615.

備註

此實作與 UInt64.ToString()完全相同。

適用於

ToString(Int64)

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

來源:: Convert.cs

將指定的 64 位元有符號整數值轉換為其等價的字串表示。

public:
 static System::String ^ ToString(long value);

public static string ToString(long value);

static member ToString : int64 -> string

Public Shared Function ToString (value As Long) As String

參數

value: Int64

要轉換的64位帶正負號整數。

傳回

String

的 value字串表示。

範例

以下範例將長整數陣列中的每個元素轉換為其等價的字串表示。

// Create a NumberFormatInfo object and set several of its
// properties that control default integer formatting.
System.Globalization.NumberFormatInfo provider = new System.Globalization.NumberFormatInfo();
provider.NegativeSign = "minus ";

long[] values = { -200, 0, 1000 };

foreach (long value in values)
   Console.WriteLine("{0,-6}  -->  {1,10}",
                     value, Convert.ToString(value, provider));
// The example displays the following output:
//       -200    -->   minus 200
//       0       -->           0
//       1000    -->        1000

// Create a NumberFormatInfo object and set several of its
// properties that control default integer formatting.
let provider = System.Globalization.NumberFormatInfo()
provider.NegativeSign <- "minus "

let values = [| -200; 0; 1000 |]

for value in values do
    printfn $"{value,-6}  -->  {Convert.ToString(value, provider),10}"
// The example displays the following output:
//       -200    -->   minus 200
//       0       -->           0
//       1000    -->        1000

' Create a NumberFormatInfo object and set several of its
' properties that control default integer formatting.
Dim provider As New System.Globalization.NumberFormatInfo()
provider.NegativeSign = "minus "

Dim values() As Long = { -200, 0, 1000 }

For Each value As Long In values
   Console.WriteLine("{0,-6}  -->  {1,10}", _
                     value, Convert.ToString(value, provider))
Next
' The example displays the following output:
'       -200    -->   minus 200
'       0       -->           0
'       1000    -->        1000

備註

此實作與 Int64.ToString()完全相同。

適用於

意見反應

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