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Asynchronous HttpWebRequest

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  9 years ago

  by Developer Fusion Bot

  Developer Fusion Bot

  , United Kingdom

  Joined 2 years ago

  This thread is for discussions of Asynchronous HttpWebRequest.

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• • Reply

  2 years ago

  by Bernd Truckses

  Bernd Truckses

  , Germany

  Joined 2 years ago

  Hi Steven
  
  I've got the following problem and your proposal seems to be the solution:
  
  

  I want to do a asynchronous Request, where I have to post a large amount of data to some old asp - component. "Asynchronous" means for me to start the posting and imideately continue with my workflow while in background the huge amount of data is posting...

  therrefore I call as suggested in msdn - help:

  // Start the asynchronous request.
  
  IAsyncResult result = ( IAsyncResult ) httpRequest.BeginGetResponse ( new AsyncCallback ( RespCallback ), state );

  // this line implements the timeout, if there is a timeout, the callback fires and the request becomes aborted
  
  ThreadPool.RegisterWaitForSingleObject (
  result.AsyncWaitHandle, new WaitOrTimerCallback ( TimeoutCallback ),
  httpRequest, DefaultTimeout, true );
  
  Now I set my breakpoint in the RespCallback() - Method and here'se the problem:
  after BeginGetResponse () the process first jumps to RespCallback() and then jumps to RegisterWaitForSingleObject()
  
  So this is not realy asynchronous...
  Did I miss something or is this general behaviour ?
  
  after trying your solution (perform this request in an extra thread) I saw that this would be the right way but I have some questions left:
  
  If you start this request in an extra thread, why do you make this request asynchronous ?
  I think, asynchronity in this place is achieved by the extra thread which runs in the background
  
  Is there a way to achieve the asynchronity I want without this extra thread (I'm not sure that what I want realy matches the meaning of "asynchronity" used by BeginGetResponse() ... EndGetResponse() ) ?
  
  
  thanx in advance and nice greetings
    Bernd
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  

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• • Reply

  1 year ago

  by gabegarza

  gabe garza

  , United States

  Joined 1 year ago

  "Careful with that Axe Eugene" - I love that song.

   

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