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DesignerTransactionCloseEventHandler 代理人

定義

表示處理設計工具的 TransactionClosedTransactionClosing 事件的方法。

public delegate void DesignerTransactionCloseEventHandler(System::Object ^ sender, DesignerTransactionCloseEventArgs ^ e);
public delegate void DesignerTransactionCloseEventHandler(object sender, DesignerTransactionCloseEventArgs e);
public delegate void DesignerTransactionCloseEventHandler(object? sender, DesignerTransactionCloseEventArgs e);
[System.Runtime.InteropServices.ComVisible(true)]
public delegate void DesignerTransactionCloseEventHandler(object sender, DesignerTransactionCloseEventArgs e);
type DesignerTransactionCloseEventHandler = delegate of obj * DesignerTransactionCloseEventArgs -> unit
[<System.Runtime.InteropServices.ComVisible(true)>]
type DesignerTransactionCloseEventHandler = delegate of obj * DesignerTransactionCloseEventArgs -> unit
Public Delegate Sub DesignerTransactionCloseEventHandler(sender As Object, e As DesignerTransactionCloseEventArgs)

參數

sender
Object

事件的來源。

屬性

範例

下列範例示範註冊 DesignerTransactionCloseEventHandler 和處理 TransactionClosingTransactionClosed 事件。

public:
   void LinkDesignerTransactionCloseEvent( IDesignerHost^ host )
   {
      // Registers an event handler for the designer TransactionClosing and TransactionClosed events.
      host->TransactionClosing += gcnew DesignerTransactionCloseEventHandler(
         this, &DesignerTransactionCloseEventHandlerExample::OnTransactionClose );
      host->TransactionClosed += gcnew DesignerTransactionCloseEventHandler(
         this, &DesignerTransactionCloseEventHandlerExample::OnTransactionClose );
   }

private:
   void OnTransactionClose( Object^ sender, DesignerTransactionCloseEventArgs^ e )
   {
      // Displays transaction close information on the console.
      if ( e->TransactionCommitted )
      {
         Console::WriteLine( "Transaction has been committed." );
      }
      else
      {
         Console::WriteLine( "Transaction has not yet been committed." );
      }
   }
public void LinkDesignerTransactionCloseEvent(IDesignerHost host)
{                       
    // Registers an event handler for the designer TransactionClosing and TransactionClosed events.
    host.TransactionClosing += new DesignerTransactionCloseEventHandler(this.OnTransactionClose);
    host.TransactionClosed += new DesignerTransactionCloseEventHandler(this.OnTransactionClose);
}

private void OnTransactionClose(object sender, DesignerTransactionCloseEventArgs e)
{
    // Displays transaction close information on the console.           
    if( e.TransactionCommitted )            
        Console.WriteLine("Transaction has been committed.");
    else
        Console.WriteLine("Transaction has not yet been committed.");
}
Public Sub LinkDesignerTransactionCloseEvent(ByVal host As IDesignerHost)
    ' Registers an event handler for the designer TransactionClosing 
    ' and TransactionClosed events.
    AddHandler host.TransactionClosing, AddressOf Me.OnTransactionClose
    AddHandler host.TransactionClosed, AddressOf Me.OnTransactionClose
End Sub

Private Sub OnTransactionClose(ByVal sender As Object, ByVal e As DesignerTransactionCloseEventArgs)
    ' Displays transaction close information on the console.           
    If e.TransactionCommitted Then
        Console.WriteLine("Transaction has been committed.")
    Else
        Console.WriteLine("Transaction has not yet been committed.")
    End If
End Sub

備註

建立 DesignerTransactionCloseEventHandler 委派時,必須識別處理事件的方法。 若要使事件與您的事件處理常式產生關聯,請將委派的執行個體 (Instance) 加入至事件。 除非您移除委派,否則每當事件發生時就會呼叫事件處理常式。 如需事件處理程式委派的詳細資訊,請參閱 處理和引發事件

擴充方法

GetMethodInfo(Delegate)

取得表示特定委派所代表之方法的物件。

適用於

另請參閱