[Mono-bugs] [Bug 328830] New: BackgroundWorker: RunWorkerCompletedEventArgs. Result should rethrow exception from DoWork

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Thu Sep 27 04:45:51 EDT 2007


https://bugzilla.novell.com/show_bug.cgi?id=328830

           Summary: BackgroundWorker: RunWorkerCompletedEventArgs.Result
                    should rethrow exception from DoWork
           Product: Mono: Class Libraries
           Version: 1.2
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at ximian.com
        ReportedBy: andyhume32 at yahoo.co.uk
         QAContact: mono-bugs at ximian.com
          Found By: ---


Created an attachment (id=175066)
 --> (https://bugzilla.novell.com/attachment.cgi?id=175066)
Repro

>From RunWorkerCompletedEventArgs.Result page at MSDN
http://msdn2.microsoft.com/en-gb/library/System.ComponentModel.RunWorkerCompletedEventArgs.Result.aspx:
    If an exception was raised or if the operation was canceled,
    accessing the Result property raises an exception. 

I was just modifying some of my code to move exception handling out of DoWork
into RunWorkerCompleted and found that I didn't get any exceptions re-thrown on
Mono.  I was surprised to find on MSFT that the exception is wrapped in a
TargetInvocationException when rethrown.  See attached repro.


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