FtpWebRequest::EndGetRequestStream Method (IAsyncResult^)


Ends a pending asynchronous operation started with BeginGetRequestStream.

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

virtual Stream^ EndGetRequestStream(
	IAsyncResult^ asyncResult
) override


Type: System::IAsyncResult^

The IAsyncResult object that was returned when the operation started.

Return Value

Type: System.IO::Stream^

A writable Stream instance associated with this instance.

Exception Condition

asyncResult is null.


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 in the .NET Framework.

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;

.NET Framework
Available since 2.0
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