OpenWriteCompletedEventHandler Delegate
Represents the method that will handle the OpenWriteCompleted event of a WebClient.
Assembly: System (in System.dll)
public delegate void OpenWriteCompletedEventHandler( Object sender, OpenWriteCompletedEventArgs e )
Parameters
- sender
- Type: System.Object
The source of the event.
- e
- Type: System.Net.OpenWriteCompletedEventArgs
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. }
void OpenResourceForPosting (String* address)
{
WebClient* client = new WebClient ();
// Specify that the OpenWriteCallback method gets called
// when the writeable stream is available.
client->OpenWriteCompleted += new OpenWriteCompletedEventHandler (OpenWriteCallback2);
client->OpenWriteAsync (address);
// Applications can perform other tasks
// while waiting for the upload to complete.
}
The following method is called when the stream is available.
private 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 (); } } }
void OpenWriteCallback2 (Object* /*sender*/, OpenWriteCompletedEventArgs* e)
{
Stream* body = 0;
StreamWriter* s = 0;
try
{
body = dynamic_cast<Stream*>(e->Result);
s = new StreamWriter (body);
s->AutoFlush = true;
s->Write (S"This is content data to be sent to the server.");
}
__finally
{
if (s != 0)
{
s->Close ();
}
if (body != 0)
{
body->Close ();
}
}
}
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
