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WebClient.OpenWriteCompleted Event

Occurs when an asynchronous operation to open a stream to write data to a resource completes.

Namespace:  System.Net
Assembly:  System (in System.dll)

'Declaration
Public Event OpenWriteCompleted As OpenWriteCompletedEventHandler

This event is raised each time an asynchronous operation to open a stream that is used to send data to a resource completes. These operations are started by calling the OpenWriteAsync methods.

The OpenWriteCompletedEventHandler is the delegate for this event. The OpenWriteCompletedEventArgs class provides the event handler with event data.

For more information about handling events, see Consuming Events.

The following code example demonstrates setting an event handler for this event.

		Public Shared Sub OpenResourceForWriting2(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, "POST")
			'  Applications can perform other tasks 
			'  while waiting for the upload to complete. 
		End Sub

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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