FtpWebRequest.EndGetRequestStream Method

Ends a pending asynchronous operation started with BeginGetRequestStream.

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

virtual Stream^ EndGetRequestStream (
	IAsyncResult^ asyncResult
) override
public Stream EndGetRequestStream (
	IAsyncResult asyncResult
public override function EndGetRequestStream (
	asyncResult : IAsyncResult
) : Stream
Not applicable.



The IAsyncResult object that was returned when the operation started.

Return Value

A writable Stream instance associated with this instance.

Exception typeCondition


asyncResult is a null reference (Nothing in Visual Basic).


asyncResult was not obtained by calling BeginGetRequestStream.


This method was already called for the operation identified by asyncResult.

If the operation has not completed, the EndGetRequestStream method blocks until the operation completes. To determine whether the operation has completed, check the IsCompleted property before calling EndGetRequestStream.

In addition to the exceptions noted in "Exceptions," EndGetRequestStream rethrows exceptions that were thrown while opening the stream for writing.


This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing.

The following code example demonstrates ending an asynchronous operation to get a request's stream. This code example is part of a larger example provided for the FtpWebRequest class overview.

   static void EndGetStreamCallback( IAsyncResult^ ar )
      FtpState^ state = dynamic_cast<FtpState^>(ar->AsyncState);
      Stream^ requestStream = nullptr;

      // End the asynchronous call to get the request stream.
         requestStream = state->Request->EndGetRequestStream( ar );

         // Copy the file contents to the request stream.
         const int bufferLength = 2048;
         array<Byte>^buffer = gcnew array<Byte>(bufferLength);
         int count = 0;
         int readBytes = 0;
         FileStream^ stream = File::OpenRead( state->FileName );
            readBytes = stream->Read( buffer, 0, bufferLength );
            requestStream->Write( buffer, 0, bufferLength );
            count += readBytes;
         while ( readBytes != 0 );
         Console::WriteLine( "Writing {0} bytes to the stream.", count );

         // IMPORTANT: Close the request stream before sending the request.

         // Asynchronously get the response to the upload request.
         state->Request->BeginGetResponse( gcnew AsyncCallback( EndGetResponseCallback ), state );
      // Return exceptions to the main application thread.
      catch ( Exception^ e ) 
         Console::WriteLine( "Could not get the request stream." );
         state->OperationException = e;

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