WebClient.DownloadFileCompleted WebClient.DownloadFileCompleted WebClient.DownloadFileCompleted WebClient.DownloadFileCompleted Event

Definizione

Si verifica al completamento di un'operazione asincrona di download di file.Occurs when an asynchronous file download operation completes.

public:
 event System::ComponentModel::AsyncCompletedEventHandler ^ DownloadFileCompleted;
public event System.ComponentModel.AsyncCompletedEventHandler DownloadFileCompleted;
member this.DownloadFileCompleted : System.ComponentModel.AsyncCompletedEventHandler 
Public Custom Event DownloadFileCompleted As AsyncCompletedEventHandler 

Esempi

Esempio di codice seguente viene illustrata l'impostazione di un gestore eventi per questo evento.The following code example demonstrates setting an event handler for this event.

// Sample call : DownLoadFileInBackground2 ("http://www.contoso.com/logs/January.txt");
void DownLoadFileInBackground2( String^ address )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);
   
   // Specify that the DownloadFileCallback method gets called
   // when the download completes.
   client->DownloadFileCompleted += gcnew AsyncCompletedEventHandler( DownloadFileCallback2 );
   
   // Specify a progress notification handler.
   client->DownloadProgressChanged += gcnew DownloadProgressChangedEventHandler( DownloadProgressCallback );
   client->DownloadFileAsync( uri, "serverdata.txt" );
}


// Sample call : DownLoadFileInBackground2 ("http://www.contoso.com/logs/January.txt");
public static void DownLoadFileInBackground2 (string address)
{
    WebClient client = new WebClient ();
    Uri uri = new Uri(address);

    // Specify that the DownloadFileCallback method gets called
    // when the download completes.
    client.DownloadFileCompleted += new AsyncCompletedEventHandler (DownloadFileCallback2);
    // Specify a progress notification handler.
    client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgressCallback);
    client.DownloadFileAsync (uri, "serverdata.txt");
}

'  Sample call : DownLoadFileInBackground2 ("http:' www.contoso.com/logs/January.txt")
Public Shared Sub DownLoadFileInBackground2(ByVal address As String)

	Dim client As WebClient = New WebClient()

	'  Specify that the DownloadFileCallback method gets called
	'  when the download completes.
	AddHandler client.DownloadFileCompleted, AddressOf DownloadFileCallback2
	'  Specify a progress notification handler.
	AddHandler client.DownloadProgressChanged, AddressOf DownloadProgressCallback
                      Dim uri as Uri = New Uri(address)
	client.DownloadFileAsync(uri, "serverdata.txt")
End Sub

Commenti

Questo evento viene generato ogni volta che viene completata un'operazione di download di file asincrono.This event is raised each time an asynchronous file download operation completes. Download di file asincrono vengono avviate chiamando il DownloadFileAsync metodi.Asynchronous file downloads are started by calling the DownloadFileAsync methods.

Il AsyncCompletedEventHandler è il delegato per questo evento.The AsyncCompletedEventHandler is the delegate for this event. Il AsyncCompletedEventArgs classe fornisce il gestore eventi con i dati dell'evento.The AsyncCompletedEventArgs class provides the event handler with event data.

Per altre informazioni su come gestire gli eventi, vedere la gestione e generazione di eventi.For more information about how to handle events, see Handling and Raising Events.

Si applica a