Unhandled exceptions in BackgroundWorker

Posted by edg on Stack Overflow See other posts from Stack Overflow or by edg
Published on 2008-11-03T13:50:01Z Indexed on 2010/04/15 16:53 UTC
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My WinForms app uses a number of BackgroundWorker objects to retrieve information from a database. I'm using BackgroundWorker because it allows the UI to remain unblocked during long-running database queries and it simplifies the threading model for me.

I'm getting occasional DatabaseExceptions in some of these background threads, and I have witnessed at least one of these exceptions in a worker thread while debugging. I'm fairly confident these exceptions are timeouts which I suppose its reasonable to expect from time to time.

My question is about what happens when an unhandled exception occurs in one of these background worker threads.

I don't think I can catch an exception in another thread, but can I expect my WorkerCompleted method to be executed? Is there any property or method of the BackgroundWorker I can interrogate for exceptions?

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