ComponentChangingEventHandler Delegát

Definice

public delegate void ComponentChangingEventHandler(System::Object ^ sender, ComponentChangingEventArgs ^ e);

public delegate void ComponentChangingEventHandler(object sender, ComponentChangingEventArgs e);

public delegate void ComponentChangingEventHandler(object? sender, ComponentChangingEventArgs e);

[System.Runtime.InteropServices.ComVisible(true)]
public delegate void ComponentChangingEventHandler(object sender, ComponentChangingEventArgs e);

type ComponentChangingEventHandler = delegate of obj * ComponentChangingEventArgs -> unit

[<System.Runtime.InteropServices.ComVisible(true)>]
type ComponentChangingEventHandler = delegate of obj * ComponentChangingEventArgs -> unit

Public Delegate Sub ComponentChangingEventHandler(sender As Object, e As ComponentChangingEventArgs)

Parametry

Atributy

ComVisibleAttribute

Příklady

Tento příklad ukazuje registraci ComponentChangingEventHandler a zpracování ComponentChanging události.

public:
   void LinkComponentChangingEvent( IComponentChangeService^ changeService )
   {
      // Registers an event handler for the ComponentChanging event.
      changeService->ComponentChanging += gcnew ComponentChangingEventHandler(
         this, &ComponentChangingEventHandlerExample::OnComponentChanging );
   }

private:
   void OnComponentChanging( Object^ sender, ComponentChangingEventArgs^ e )
   {
      // Displays changing component information on the console.
      Console::WriteLine( "Type of the component that is about to change: " +
         e->Component->GetType()->FullName );
      Console::WriteLine( "Name of the member of the component that is about to change: " +
         e->Member->Name );
   }

public void LinkComponentChangingEvent(IComponentChangeService changeService)
{
    // Registers an event handler for the ComponentChanging event.
    changeService.ComponentChanging += new ComponentChangingEventHandler(this.OnComponentChanging);            
}

private void OnComponentChanging(object sender, ComponentChangingEventArgs e)
{
    // Displays changing component information on the console.
    Console.WriteLine("Type of the component that is about to change: "+e.Component.GetType().FullName);      
    Console.WriteLine("Name of the member of the component that is about to change: "+e.Member.Name);                        
}

Public Sub LinkComponentChangingEvent(ByVal changeService As IComponentChangeService)
    ' Registers an event handler for the ComponentChanging event.
    AddHandler changeService.ComponentChanging, AddressOf Me.OnComponentChanging
End Sub

Private Sub OnComponentChanging(ByVal sender As Object, ByVal e As ComponentChangingEventArgs)
    ' Displays changing component information on the console.
    Console.WriteLine(("Type of the component that is about to change: " + e.Component.GetType().FullName))
    Console.WriteLine(("Name of the member of the component that is about to change: " + e.Member.Name))
End Sub

Poznámky

Při vytváření delegáta ComponentChangingEventHandler identifikujete metodu, která bude událost zpracovávat. Pokud chcete událost přidružit k obslužné rutině události, přidejte do události instanci delegáta. Obslužná rutina události je volána při každém výskytu události, dokud neodeberete delegáta. Další informace o delegátech obslužné rutiny událostí najdete v tématu Zpracování a vyvolávání událostí.

Metody rozšíření

Platí pro

Viz také

• ComponentChanging
• ComponentChanged
• ComponentChangingEventArgs
• IComponentChangeService