OpenWriteCompletedEventHandler Delegate
Assembly: System (in system.dll)
public delegate void OpenWriteCompletedEventHandler ( Object sender, OpenWriteCompletedEventArgs e )
/** @delegate */ public delegate void OpenWriteCompletedEventHandler ( Object sender, OpenWriteCompletedEventArgs e )
JScript supports the use of delegates, but not the declaration of new ones.
Parameters
- sender
The source of the event.
- e
A OpenWriteCompletedEventArgs containing event data.
The following code example demonstrates opening a stream to write data to be uploaded.
public static void OpenResourceForPosting (string address) { WebClient client = new WebClient (); Uri uri = new Uri(address); // Specify that the OpenWriteCallback method gets called // when the writeable stream is available. client.OpenWriteCompleted += new OpenWriteCompletedEventHandler (OpenWriteCallback2); client.OpenWriteAsync (uri); // Applications can perform other tasks // while waiting for the upload to complete. }
The following method is called when the stream is available.
public static void OpenWriteCallback2 (Object sender, OpenWriteCompletedEventArgs e) { Stream body = null; StreamWriter s = null; try { body = (Stream)e.Result; s = new StreamWriter (body); s.AutoFlush = true; s.Write ("This is content data to be sent to the server."); } finally { if (s != null) { s.Close (); } if (body != null) { body.Close (); } } }
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.