OdbcConnectionStringBuilder.Remove(String) 方法

定義

命名空間:
System.Data.Odbc
組件:
System.Data.Odbc.dll
組件:
System.Data.dll
套件:
System.Data.Odbc v11.0.0-preview.4.26230.115
來源:
OdbcConnectionStringbuilder.cs
來源:
OdbcConnectionStringbuilder.cs
來源:
OdbcConnectionStringbuilder.cs
來源:
OdbcConnectionStringbuilder.cs

從實例中移除指定金鑰 OdbcConnectionStringBuilder 的條目。

public:
 override bool Remove(System::String ^ keyword);
public override bool Remove(string keyword);
override this.Remove : string -> bool
Public Overrides Function Remove (keyword As String) As Boolean

參數

keyword
String

在此 OdbcConnectionStringBuilder 中，要從連接字串中移除的鍵/值對的鍵。

傳回

Boolean

true 若金鑰存在於連接字串中且已被移除;false 若金鑰不存在。

例外狀況

ArgumentNullException

keyword 在 Visual Basic 中為空Nothing 。

範例

以下範例建立一個 OdbcConnectionStringBuilder 實例並展示該 Remove 方法的行為。

using System.Data.Odbc;

class Program
{
    static void Main()
    {
        OdbcConnectionStringBuilder builder =
            new OdbcConnectionStringBuilder();
        builder.ConnectionString =
            "Driver={SQL Server};Server=(local);" +
            "Database=AdventureWorks;Trusted_Connection=yes;";

        Console.WriteLine(builder.ConnectionString);

        // Try to remove an existing item.
        TryRemove(builder, "Server");

        // Try to remove a nonexistent item.
        TryRemove(builder, "User ID");

        // Try to remove an existing item,
        // demonstrating that the search is not
        // case sensitive.
        TryRemove(builder, "DATABASE");

        Console.WriteLine("Press Enter to continue.");
        Console.ReadLine();
    }

    static void TryRemove(OdbcConnectionStringBuilder builder,
        string itemToRemove)
    {

        if (builder.Remove(itemToRemove))
        {
            Console.WriteLine("Removed '{0}'", itemToRemove);
        }
        else
        {
            Console.WriteLine("Unable to remove '{0}'", itemToRemove);
        }
        Console.WriteLine(builder.ConnectionString);
    }
}

Imports System.Data.Odbc  
  
Module Module1
  Sub Main()
    Dim builder As New OdbcConnectionStringBuilder
    builder.ConnectionString = _
     "Driver={SQL Server};Server=(local);" & _
     "Database=AdventureWorks;Trusted_Connection=yes;"

    Console.WriteLine(builder.ConnectionString)

    ' Try to remove an existing item.
    TryRemove(builder, "Server")

    ' Try to remove a nonexistent item.
    TryRemove(builder, "User ID")

    ' Try to remove an existing item, 
    ' demonstrating that the search is not 
    ' case sensitive.
    TryRemove(builder, "DATABASE")

    Console.WriteLine("Press Enter to continue.")
    Console.ReadLine()
  End Sub

  Sub TryRemove(ByVal builder As OdbcConnectionStringBuilder, _
      ByVal itemToRemove As String)

    If builder.Remove(itemToRemove) Then
      Console.WriteLine("Removed '{0}'", itemToRemove)
    Else
      Console.WriteLine("Unable to remove '{0}'", itemToRemove)
    End If
    Console.WriteLine(builder.ConnectionString)
  End Sub
End Module

備註

由於 Remove 方法回傳的值顯示其成功，因此在嘗試移除該鍵值對 OdbcConnectionStringBuilder 之前，不需要先尋找金鑰的存在。

適用於

另請參閱