Throwing an exception from a BackgroundWorker which calls an async. method (Webrequest)

Posted by mrbamboo on Stack Overflow See other posts from Stack Overflow or by mrbamboo
Published on 2010-04-09T16:49:04Z Indexed on 2010/04/09 16:53 UTC
Read the original article Hit count: 448

Filed under:

backgroundworker

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webrequest

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exception

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asynccallback

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c#

Hi,

My main application creates a new BackgroundWorker X
the DoWork event handler of X calls a method Y of my controller. This method creates the WebRequest (async.) instance and the callback using AsyncCallback.
When the response arrives the callback method Z gets called and the content will be analyzed. It can happen that the response has an unwanted content. At that moment callback Z will throw an exception.

I want to catch this exception in my main application. I tried it in DoWork and RunWorkerCompleted but nothing can be caught from there.

Error in RunWorkerCompletedEventArgs is always null.

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