ComponentChangingEventHandler Delegato

Definizione

Rappresenta il metodo che gestirà un evento ComponentChanging.Represents the method that will handle a ComponentChanging event.

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

Parametri

sender
Object

Origine dell'evento.The source of the event.

e
ComponentChangingEventArgs

Evento ComponentChangingEventArgs che contiene i dati dell'evento.A ComponentChangingEventArgs event that contains the event data.

Ereditarietà
ComponentChangingEventHandler
Attributi

Esempi

In questo esempio viene illustrata ComponentChangingEventHandler la registrazione di ComponentChanging un oggetto e la gestione dell'evento.This example demonstrates registering a ComponentChangingEventHandler and handling the ComponentChanging event.

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

Commenti

Quando si crea un delegato ComponentChangingEventHandler, si identifica il metodo che gestirà l'evento.When you create a ComponentChangingEventHandler delegate, you identify the method that will handle the event. Per associare l'evento al gestore eventi in uso, aggiungere all'evento un'istanza del delegato.To associate the event with your event handler, add an instance of the delegate to the event. Il gestore eventi viene chiamato ogni volta che si verifica l'evento, a meno che non venga rimosso il delegato.The event handler is called whenever the event occurs, unless you remove the delegate. Per ulteriori informazioni sui delegati del gestore eventi, vedere gestione e generazione di eventi.For more information about event-handler delegates, see Handling and Raising Events.

Metodi di estensione

GetMethodInfo(Delegate)

Ottiene un oggetto che rappresenta il metodo rappresentato dal delegato specificato.Gets an object that represents the method represented by the specified delegate.

Si applica a

Vedi anche