Assembly: System (in system.dll)
'Declaration Public Class OpenWriteCompletedEventArgs Inherits AsyncCompletedEventArgs 'Usage Dim instance As OpenWriteCompletedEventArgs
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.
Public 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
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.