DateTimeOffset.ToLocalTime 方法

public:
 DateTimeOffset ToLocalTime();

public DateTimeOffset ToLocalTime();

member this.ToLocalTime : unit -> DateTimeOffset

Public Function ToLocalTime () As DateTimeOffset

傳回

一個物件，代表當前 DateTimeOffset 物件的日期和時間，轉換成當地時間。

範例

以下範例使用此 ToLocalTime 方法將值 DateTimeOffset 轉換為太平洋標準時區的當地時間。 同時也說明了該方法對當地時區調整規則的支援。

// Local time changes on 3/11/2007 at 2:00 AM
DateTimeOffset originalTime, localTime;

originalTime = new DateTimeOffset(2007, 3, 11, 3, 0, 0,
                                  new TimeSpan(-6, 0, 0));
localTime = originalTime.ToLocalTime();
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(),
                                           localTime.ToString());

originalTime = new DateTimeOffset(2007, 3, 11, 4, 0, 0,
                                  new TimeSpan(-6, 0, 0));
localTime = originalTime.ToLocalTime();
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(),
                                           localTime.ToString());

// Define a summer UTC time
originalTime = new DateTimeOffset(2007, 6, 15, 8, 0, 0,
                                  TimeSpan.Zero);
localTime = originalTime.ToLocalTime();
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(),
                                           localTime.ToString());

// Define a winter time
originalTime = new DateTimeOffset(2007, 11, 30, 14, 0, 0,
                                  new TimeSpan(3, 0, 0));
localTime = originalTime.ToLocalTime();
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(),
                                           localTime.ToString());
// The example produces the following output:
//    Converted 3/11/2007 3:00:00 AM -06:00 to 3/11/2007 1:00:00 AM -08:00.
//    Converted 3/11/2007 4:00:00 AM -06:00 to 3/11/2007 3:00:00 AM -07:00.
//    Converted 6/15/2007 8:00:00 AM +00:00 to 6/15/2007 1:00:00 AM -07:00.
//    Converted 11/30/2007 2:00:00 PM +03:00 to 11/30/2007 3:00:00 AM -08:00.

// Local time changes on 3/11/2007 at 2:00 AM
let originalTime = DateTimeOffset(2007, 3, 11, 3, 0, 0, TimeSpan(-6, 0, 0))
let localTime = originalTime.ToLocalTime()
printfn $"Converted {originalTime} to {localTime}."

let originalTime = DateTimeOffset(2007, 3, 11, 4, 0, 0, TimeSpan(-6, 0, 0))
let localTime = originalTime.ToLocalTime()
printfn $"Converted {originalTime} to {localTime}."

// Define a summer UTC time
let originalTime = DateTimeOffset(2007, 6, 15, 8, 0, 0, TimeSpan.Zero)
let localTime = originalTime.ToLocalTime()
printfn $"Converted {originalTime} to {localTime}."

// Define a winter time
let originalTime = DateTimeOffset(2007, 11, 30, 14, 0, 0, TimeSpan(3, 0, 0))
let localTime = originalTime.ToLocalTime()
printfn $"Converted {originalTime} to {localTime}."

// The example produces the following output:
//    Converted 3/11/2007 3:00:00 AM -06:00 to 3/11/2007 1:00:00 AM -08:00.
//    Converted 3/11/2007 4:00:00 AM -06:00 to 3/11/2007 3:00:00 AM -07:00.
//    Converted 6/15/2007 8:00:00 AM +00:00 to 6/15/2007 1:00:00 AM -07:00.
//    Converted 11/30/2007 2:00:00 PM +03:00 to 11/30/2007 3:00:00 AM -08:00.

' Local time changes on 3/11/2007 at 2:00 AM
Dim originalTime, localTime As DateTimeOffset

originalTime = New DateTimeOffset(#03/11/2007 3:00AM#, _
                                  New TimeSpan(-6, 0, 0))
localTime = originalTime.ToLocalTime()
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(), _
                                           localTime.ToString())       

originalTime = New DateTimeOffset(#03/11/2007 4:00AM#, _
                                  New TimeSpan(-6, 0, 0))
localTime = originalTime.ToLocalTime()
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(), _
                                           localTime.ToString())       

' Define a summer UTC time
originalTime = New DateTimeOffset(#6/15/2007 8:00AM#, _
                                  TimeSpan.Zero)
localTime = originalTime.ToLocalTime()
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(), _
                                           localTime.ToString())       

' Define a winter time
originalTime = New DateTimeOffset(#11/30/2007 2:00PM#, _
                                  New TimeSpan(3, 0, 0))
localTime = originalTime.ToLocalTime()
Console.WriteLine("Converted {0} to {1}.", originalTime.ToString(), _
                                           localTime.ToString())   
' The example produces the following output:
'    Converted 3/11/2007 3:00:00 AM -06:00 to 3/11/2007 1:00:00 AM -08:00.
'    Converted 3/11/2007 4:00:00 AM -06:00 to 3/11/2007 3:00:00 AM -07:00.
'    Converted 6/15/2007 8:00:00 AM +00:00 to 6/15/2007 1:00:00 AM -07:00.
'    Converted 11/30/2007 2:00:00 PM +03:00 to 11/30/2007 3:00:00 AM -08:00.

備註

在執行當地時間轉換時，方法首先將當前 DateTimeOffset 物件的日期和時間轉換為協調世界時（UTC），方法是從時間中減去偏移量。 接著，它會將UTC的日期和時間，透過加上當地時區的偏移轉換成當地時間。 在此過程中，它會考慮當地時區的任何調整規則。

目前 DateTimeOffset 物件的值與方法呼叫回傳的物件值 DateTimeOffset 代表同一時間點。 也就是說，如果兩者都傳入 DateTimeOffset.Equals(DateTimeOffset, DateTimeOffset) 方法，該方法將返回 true。

若轉換導致時間超出該 DateTimeOffset 類型範圍，方法 ToLocalTime 回傳一個 DateTimeOffset 物件，日期與時間設為 MaxValue 或 MinValue ，偏移量設為當地時區偏移。

另請參閱

• ToUniversalTime()