UploadDataCompletedEventHandler Delegat

Definicja

Reprezentuje metodę, która będzie obsługiwać zdarzenie UploadDataCompleted WebClient.Represents the method that will handle the UploadDataCompleted event of a WebClient.

public delegate void UploadDataCompletedEventHandler(System::Object ^ sender, UploadDataCompletedEventArgs ^ e);
public delegate void UploadDataCompletedEventHandler(object sender, UploadDataCompletedEventArgs e);
type UploadDataCompletedEventHandler = delegate of obj * UploadDataCompletedEventArgs -> unit
Public Delegate Sub UploadDataCompletedEventHandler(sender As Object, e As UploadDataCompletedEventArgs)

Parametry

sender
Object

Źródło zdarzenia.The source of the event.

e
UploadDataCompletedEventArgs

UploadDataCompletedEventArgs zawierający dane zdarzenia.A UploadDataCompletedEventArgs containing event data.

Dziedziczenie
UploadDataCompletedEventHandler

Przykłady

Poniższy przykład kodu demonstruje asynchroniczne przekazywanie danych.The following code example demonstrates asynchronously uploading data.

void UploadDataInBackground2( String^ address )
{
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);
   String^ text = "Time = 12:00am temperature = 50";
   array<Byte>^data = System::Text::Encoding::UTF8->GetBytes( text );
   String^ method = "POST";

   client->UploadDataCompleted += gcnew UploadDataCompletedEventHandler( UploadDataCallback2 );
   client->UploadDataAsync( uri, method, data );
}


public static void UploadDataInBackground2 (string address)
{
    WebClient client = new WebClient ();
    Uri uri = new Uri(address);
    string text = "Time = 12:00am temperature = 50";
    byte[] data = System.Text.Encoding.UTF8.GetBytes (text);
    string method = "POST";

    client.UploadDataCompleted += new UploadDataCompletedEventHandler (UploadDataCallback2);
    client.UploadDataAsync (uri, method, data);
}

Public Shared Sub UploadDataInBackground2(ByVal address As String)

    Dim client As WebClient = New WebClient()
    Dim text As String = "Time = 12:00am temperature = 50"
    Dim data() As Byte = System.Text.Encoding.UTF8.GetBytes(text)
    Dim method As String = "POST"

    AddHandler client.UploadDataCompleted, AddressOf UploadDataCallback2
    Dim uri as Uri = New Uri(address)
                client.UploadDataAsync(uri, method, data)
End Sub

Następująca metoda jest wywoływana po zakończeniu przekazywania.The following method is called when the upload completes.

void UploadDataCallback2( Object^ /*sender*/, UploadDataCompletedEventArgs^ e )
{
   array<Byte>^data = dynamic_cast<array<Byte>^>(e->Result);
   String^ reply = System::Text::Encoding::UTF8->GetString( data );
   Console::WriteLine( reply );
}


private static void UploadDataCallback2 (Object sender, UploadDataCompletedEventArgs e)
{
    byte[] data = (byte[])e.Result;
    string reply = System.Text.Encoding.UTF8.GetString (data);

    Console.WriteLine (reply);
}

Private Shared Sub UploadDataCallback2(ByVal sender As Object, ByVal e As UploadDataCompletedEventArgs)

    Dim data() As Byte = CType(e.Result, Byte())
    Dim reply As String = System.Text.Encoding.UTF8.GetString(data)

    Console.WriteLine(reply)
End Sub

Uwagi

Podczas tworzenia delegata UploadDataCompletedEventHandler należy zidentyfikować metodę, która będzie obsługiwać zdarzenie.When you create a UploadDataCompletedEventHandler delegate, you identify the method that will handle the event. Aby skojarzyć zdarzenie z programem obsługi zdarzeń, Dodaj wystąpienie delegata do zdarzenia.To associate the event with your event handler, add an instance of the delegate to the event. Program obsługi zdarzeń jest wywoływany przy każdym wystąpieniu zdarzenia, o ile nie usunięto delegata.The event handler is called whenever the event occurs, unless you remove the delegate. Aby uzyskać więcej informacji na temat delegatów obsługi zdarzeń, zobacz temat Obsługa iwywoływanie zdarzeń.For more information about event handler delegates, see Handling and Raising Events.

Metody rozszerzania

GetMethodInfo(Delegate)

Pobiera obiekt, który reprezentuje metodę reprezentowaną przez określony delegat.Gets an object that represents the method represented by the specified delegate.

Dotyczy