I have a SL2RC0 application that I am debugging in VSTS 2008 and it is getting a Sys.InvalidOperationException "value does not fall within expected range" error and triggering the Microsoft Script Debugger to come up. The MS Script Debugger does not show me much of a stack trace, but the message property in the exception shows quite a stack trace.

Apparently the error is coming from a ListBox.OnSelectionChanged that was triggered by a ListBoxItem.OnMouseLeftButtonDown. But without an active stacktrace in the MS Script Debuuger I can not look at any of the details of the calls to try an determine which list box in my application might be causing the exception.

How do I find out what is causing this exception?
How do I find out which ListBox is creating this exception?
How do I get this exception to trigger the debugger in VSTS 2008 instead of a runtime debugger?

THANKS for your help.

Hi,

what Code are you writing in your Selection changed event.

I normally found this error occurs when you are adding a object from one collection  into some other collection means we want that object into two collection.

So instead of this we can create a new object and copy properties from existing object... 

Mark as answer if this post answered your question.

Harsh Bardhan

HarshBardhan:

Hi,

what Code are you writing in your Selection changed event.

I don't have any code in any Selection changed event. The Selection changed event seemed to be triggered automatically by the MouseLeftButtonDown on the ListBox, but the Selection changed event runs after I remove the ListBox in the MouseLeftButtonDown event handler. I think that whatever the system is doing in the Selection changed event should be done before the MouseLeftButtonDown event handler is invoked, or it should silently abort if the ListBox is Removed and not thow an exception.

Hi Dbaechtel,

Sys.InvalidOperationException is usually raised by being given not invalid arguments.  Debugging techniques is a big topic, which has tons of books been published.   Here,  would you please provide a tiny repro to make the discussion much easier to be performed ? Thanks for understanding.

Best regards,

Jonathan

Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Jonathan Shen – MSFT:

 Here,  would you please provide a tiny repro to make the discussion much easier to be performed ? Thanks for understanding.

These Silverlight.Net forums do not provide any mechanism to provide a repro project. If they are so dependant on repro projects in order to assist, then they should provide some mechanism to attach significant amounts of code. The Silverlight group is only doing itself a disservice when they make it more difficult to find and fix these problems before the  formal release.

Hi Dbaechtel,

Yes.  Currently, Silverlight.net is the only entrance to feedback.  However, you can paste your code or upload to somewhere and give us the link.  Thanks.

Best regards,

Jonathan

Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.