OpenWriteCompletedEventHandler Delegate
.NET Framework (current version)
Represents the method that will handle the OpenWriteCompleted event of a WebClient.
Assembly: System (in System.dll)
Public Delegate Sub OpenWriteCompletedEventHandler ( sender As Object, e As OpenWriteCompletedEventArgs )
Parameters
- sender
-
Type:
System.Object
The source of the event.
- e
-
Type:
System.Net.OpenWriteCompletedEventArgs
A OpenWriteCompletedEventArgs containing event data.
When you create a OpenWriteCompletedEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate.
The following code example demonstrates opening a stream to write data to be uploaded.
Public Shared Sub OpenResourceForPosting(ByVal address As String) Dim client As WebClient = New WebClient() ' Specify that the OpenWriteCallback method gets called ' when the writeable stream is available. AddHandler client.OpenWriteCompleted, AddressOf OpenWriteCallback2 Dim uri as Uri = New Uri(address) client.OpenWriteAsync(uri) ' Applications can perform other tasks ' while waiting for the upload to complete. End Sub
The following method is called when the stream is available.
Private Shared Sub OpenWriteCallback2(ByVal sender As Object, ByVal e As OpenWriteCompletedEventArgs) Dim body As Stream = Nothing Dim s As StreamWriter = Nothing Try body = CType(e.Result, Stream) s = New StreamWriter(body) s.AutoFlush = True s.Write("This is content data to be sent to the server.") Finally If Not s Is Nothing Then s.Close() End If If Not body Is Nothing Then body.Close() End If End Try End Sub
.NET Framework
Available since 2.0
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Available since 2.0
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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