WebClient.OnDownloadDataCompleted(DownloadDataCompletedEventArgs) WebClient.OnDownloadDataCompleted(DownloadDataCompletedEventArgs) WebClient.OnDownloadDataCompleted(DownloadDataCompletedEventArgs) WebClient.OnDownloadDataCompleted(DownloadDataCompletedEventArgs) Method

Definizione

Genera l'evento DownloadDataCompleted.Raises the DownloadDataCompleted event.

protected:
 virtual void OnDownloadDataCompleted(System::Net::DownloadDataCompletedEventArgs ^ e);
protected virtual void OnDownloadDataCompleted (System.Net.DownloadDataCompletedEventArgs e);
abstract member OnDownloadDataCompleted : System.Net.DownloadDataCompletedEventArgs -> unit
override this.OnDownloadDataCompleted : System.Net.DownloadDataCompletedEventArgs -> unit
Protected Overridable Sub OnDownloadDataCompleted (e As DownloadDataCompletedEventArgs)

Parametri

Esempi

Nell'esempio di codice seguente viene illustrata un'implementazione di questo metodo che può essere personalizzata da una WebClientclasse derivata da.The following code example shows an implementation of this method that can be customized by a class derived from WebClient.

virtual void OnDownloadDataCompleted( DownloadDataCompletedEventArgs ^ e ) override
{
   // Here you can perform any custom actions before the event is raised
   // and event handlers are called...
   WebClient::OnDownloadDataCompleted( e );

   // Here you can perform any post event actions...
}
protected override void OnDownloadDataCompleted (DownloadDataCompletedEventArgs e)
{
    // Here you can perform any custom actions before the event is raised
    // and event handlers are called...

    base.OnDownloadDataCompleted(e);

    // Here you can perform any post event actions...
}

Commenti

Le classi che ereditano da questa classe possono eseguire l'override di questo metodo per DownloadDataCompleted eseguire attività aggiuntive quando si verifica l'evento.Classes that inherit from this class can override this method to perform additional tasks when the DownloadDataCompleted event occurs.

Quando viene generato un evento, il gestore dell'evento viene richiamato tramite un delegato.Raising an event invokes the event handler through a delegate. Per altre informazioni, vedere gestione e generazione di eventiFor more information, see Handling and Raising Events

Il metodo OnDownloadDataCompleted consente inoltre alle classi derivate di gestire l'evento senza associare un delegato.The OnDownloadDataCompleted method also allows derived classes to handle the event without attaching a delegate. È la tecnica consigliata per la gestione dell'evento in una classe derivata.This is the preferred technique for handling the event in a derived class.

Note per gli eredi

Quando si esegue OnDownloadDataCompleted(DownloadDataCompletedEventArgs) l'override in una classe derivata, assicurarsi di chiamare il OnDownloadDataCompleted(DownloadDataCompletedEventArgs) metodo della classe base in modo che i delegati registrati ricevano l'evento.When overriding OnDownloadDataCompleted(DownloadDataCompletedEventArgs) in a derived class, be sure to call the base class' OnDownloadDataCompleted(DownloadDataCompletedEventArgs) method so that registered delegates receive the event.

Si applica a