WebClient.UploadProgressChanged WebClient.UploadProgressChanged WebClient.UploadProgressChanged WebClient.UploadProgressChanged Event

Definition

Tritt ein, wenn Daten teilweise oder vollständig erfolgreich über einen asynchronen Upload übertragen werden.Occurs when an asynchronous upload operation successfully transfers some or all of the data.

public:
 event System::Net::UploadProgressChangedEventHandler ^ UploadProgressChanged;
public event System.Net.UploadProgressChangedEventHandler UploadProgressChanged;
member this.UploadProgressChanged : System.Net.UploadProgressChangedEventHandler 
Public Custom Event UploadProgressChanged As UploadProgressChangedEventHandler 

Beispiele

Das folgende Codebeispiel veranschaulicht das Festlegen von eines ereignishandlers für dieses Ereignis.The following code example demonstrates setting an event handler for this event.

// Sample call: UploadFileInBackground2("http://www.contoso.com/fileUpload.aspx", "data.txt")
void UploadFileInBackground2( String^ address, String^ fileName )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);

   client->UploadFileCompleted += 
     gcnew UploadFileCompletedEventHandler (UploadFileCallback2);
   
   // Specify a progress notification handler.
   client->UploadProgressChanged += 
       gcnew UploadProgressChangedEventHandler( UploadProgressCallback );
   client->UploadFileAsync( uri, "POST", fileName );
   Console::WriteLine( "File upload started." );
}


  // Sample call: UploadFileInBackground2("http://www.contoso.com/fileUpload.aspx", "data.txt")
  public static void UploadFileInBackground2 (string address, string fileName)
  {
      WebClient client = new WebClient ();
      Uri uri = new Uri(address);

      client.UploadFileCompleted += new UploadFileCompletedEventHandler (UploadFileCallback2);

// Specify a progress notification handler.
client.UploadProgressChanged += new UploadProgressChangedEventHandler(UploadProgressCallback);
      client.UploadFileAsync (uri, "POST", fileName);
      Console.WriteLine ("File upload started.");
  }

'  Sample call: UploadFileInBackground2("http:' www.contoso.com/fileUpload.aspx", "data.txt")
Public Shared Sub UploadFileInBackground2(ByVal address As String, ByVal fileName As String)

	Dim client As WebClient = New WebClient()
                      Dim uri as Uri =  New Uri(address)
	AddHandler client.UploadFileCompleted, AddressOf UploadFileCallback2

	'  Specify a progress notification handler.
	AddHandler client.UploadProgressChanged, AddressOf UploadProgressCallback
	client.UploadFileAsync(uri, "POST", fileName)
	Console.WriteLine("File upload started.")
End Sub

Das folgende Codebeispiel zeigt eine Implementierung eines Handlers für dieses Ereignis.The following code example shows an implementation of a handler for this event.

static void UploadProgressCallback(Object^ sender, 
          UploadProgressChangedEventArgs^ e)
      {
          // Displays the operation identifier, and the transfer progress.
          Console::WriteLine("{0}    uploaded {1} of {2} bytes. {3} % complete...", 
              (String ^)e->UserState, 
              e->BytesSent, 
              e->TotalBytesToSend,
              e->ProgressPercentage);
      }
static void DownloadProgressCallback(Object^ sender, 
          DownloadProgressChangedEventArgs^ e)
      {
          // Displays the operation identifier, and the transfer progress.
          Console::WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...", 
              (String ^)e->UserState, 
              e->BytesReceived, 
              e->TotalBytesToReceive,
              e->ProgressPercentage);
      }
private static void UploadProgressCallback(object sender, UploadProgressChangedEventArgs e)
{
    // Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    uploaded {1} of {2} bytes. {3} % complete...", 
        (string)e.UserState, 
        e.BytesSent, 
        e.TotalBytesToSend,
        e.ProgressPercentage);
}
private static void DownloadProgressCallback(object sender, DownloadProgressChangedEventArgs e)
{
    // Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...", 
        (string)e.UserState, 
        e.BytesReceived, 
        e.TotalBytesToReceive,
        e.ProgressPercentage);
}
Private Shared Sub UploadProgressCallback(ByVal sender As Object, ByVal e As UploadProgressChangedEventArgs)

    '  Displays the operation identifier, and the transfer progress.
    Console.WriteLine("{0}    uploaded {1} of {2} bytes. {3} % complete...", _
     CStr(e.UserState), e.BytesSent, e.TotalBytesToSend, e.ProgressPercentage)
End Sub
Private Shared Sub DownloadProgressCallback(ByVal sender As Object, ByVal e As DownloadProgressChangedEventArgs)

    '  Displays the operation identifier, and the transfer progress.
    Console.WriteLine("0}    downloaded 1} of 2} bytes. 3} % complete...", _
     CStr(e.UserState), e.BytesReceived, e.TotalBytesToReceive, e.ProgressPercentage)
End Sub

Hinweise

Dieses Ereignis wird jedes Mal ausgelöst, wenn ein asynchroner Upload durchgeführt wird.This event is raised each time an asynchronous upload makes progress. Dieses Ereignis wird ausgelöst, wenn Uploads mit einer der folgenden Methoden gestartet werden.This event is raised when uploads are started using any of the following methods.

MethodeMethod Beschreibung Description
UploadDataAsync Sendet eine Byte Array, das die Ressource, ohne den aufrufenden Thread blockieren.Sends a Byte array to the resource, without blocking the calling thread.
UploadFileAsync Sendet eine lokale Datei auf die Ressource, ohne den aufrufenden Thread blockieren.Sends a local file to the resource, without blocking the calling thread.
UploadValuesAsync Sendet eine NameValueCollection zur Ressource, und gibt eine Byte Array mit allen Antworten ohne Blockieren des aufrufenden Threads.Sends a NameValueCollection to the resource and returns a Byte array containing any response, without blocking the calling thread.

Die UploadProgressChangedEventHandler ist der Delegat für dieses Ereignis.The UploadProgressChangedEventHandler is the delegate for this event. Die UploadProgressChangedEventArgs Klasse stellt den Ereignishandler mit Ereignisdaten bereit.The UploadProgressChangedEventArgs class provides the event handler with event data.

Weitere Informationen zum Behandeln von Ereignissen finden Sie unter behandeln und Auslösen von Ereignissen.For more information about how to handle events, see Handling and Raising Events.

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