DesignerEventHandler 委托

定义

表示要处理 DesignerCreatedDesignerDisposed 事件的方法,这两种事件在创建或释放文档时引发。Represents the method that will handle the DesignerCreated and DesignerDisposed events that are raised when a document is created or disposed of.

public delegate void DesignerEventHandler(System::Object ^ sender, DesignerEventArgs ^ e);
public delegate void DesignerEventHandler(object sender, DesignerEventArgs e);
type DesignerEventHandler = delegate of obj * DesignerEventArgs -> unit
Public Delegate Sub DesignerEventHandler(sender As Object, e As DesignerEventArgs)

参数

sender
Object

事件源。The source of the event.

e
DesignerEventArgs

包含事件数据的 DesignerEventArgsA DesignerEventArgs that contains the event data.

继承
DesignerEventHandler

示例

下面的示例演示如何注册DesignerEventHandlerDesignerCreated处理和DesignerDisposed事件。The following example demonstrates registering a DesignerEventHandler and handling the DesignerCreated and DesignerDisposed events.

public:
   void LinkDesignerEvent( IDesignerEventService^ eventService )
   {
      // Registers an event handler for the DesignerCreated and DesignerDisposed events.
      eventService->DesignerCreated += gcnew DesignerEventHandler(
         this, &DesignerEventHandlerExample::OnDesignerEvent );
      eventService->DesignerDisposed += gcnew DesignerEventHandler(
         this, &DesignerEventHandlerExample::OnDesignerEvent );
   }

private:
   void OnDesignerEvent( Object^ sender, DesignerEventArgs^ e )
   {
      // Displays designer event information on the console.
      Console::WriteLine( "Name of the root component of the created or disposed designer: " +
         e->Designer->RootComponentClassName );
   }
public void LinkDesignerEvent(IDesignerEventService eventService)
{                                   
    // Registers an event handler for the DesignerCreated and DesignerDisposed events.
    eventService.DesignerCreated += new DesignerEventHandler(this.OnDesignerEvent);
    eventService.DesignerDisposed += new DesignerEventHandler(this.OnDesignerEvent);            
}

private void OnDesignerEvent(object sender, DesignerEventArgs e)
{
    // Displays designer event information on the console.
    Console.WriteLine("Name of the root component of the created or disposed designer: "+e.Designer.RootComponentClassName);
}
Public Sub LinkDesignerEvent(ByVal eventService As IDesignerEventService)
    ' Registers an event handler for the DesignerCreated and DesignerDisposed events.
    AddHandler eventService.DesignerCreated, AddressOf Me.OnDesignerEvent
    AddHandler eventService.DesignerDisposed, AddressOf Me.OnDesignerEvent
End Sub

Private Sub OnDesignerEvent(ByVal sender As Object, ByVal e As DesignerEventArgs)
    ' Displays designer event information on the console.
    Console.WriteLine(("Name of the root component of the created or disposed designer: " + e.Designer.RootComponentClassName))
End Sub

注解

创建 DesignerEventHandler 委托时,需要标识将处理该事件的方法。When you create a DesignerEventHandler delegate, you identify the method that will handle the event. 若要将事件与事件处理程序关联,请将该委托的一个实例添加到事件中。To associate the event with your event handler, add an instance of the delegate to the event. 除非移除了该委托,否则每当发生该事件时就会调用事件处理程序。The event handler is called whenever the event occurs, unless you remove the delegate. 有关事件处理程序委托的详细信息, 请参阅处理和引发事件For more information about event-handler delegates, see Handling and Raising Events.

扩展方法

GetMethodInfo(Delegate)

获取指示指定委托表示的方法的对象。Gets an object that represents the method represented by the specified delegate.

适用于

另请参阅