OpenWriteCompletedEventArgs Class
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OpenWriteCompletedEventArgs Class

Provides data for the OpenWriteCompleted event.

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

Public Class OpenWriteCompletedEventArgs
	Inherits AsyncCompletedEventArgs
Dim instance As OpenWriteCompletedEventArgs

public class OpenWriteCompletedEventArgs extends AsyncCompletedEventArgs
public class OpenWriteCompletedEventArgs extends AsyncCompletedEventArgs
Not applicable.

Instances of this class are passed to OpenWriteCompletedEventHandler methods.

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)
    '  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


        body = CType(e.Result, Stream)
        s = New StreamWriter(body)
        s.AutoFlush = True
        s.Write("This is content data to be sent to the server.")

        If Not s Is Nothing Then

        End If

        If Not body Is Nothing Then

        End If
    End Try
End Sub


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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