Monotouch Global Exception handling

Question

I am having a nasty bug show up in the wild, and I can't put my finger on it. Is there a way to have a Global Try/Catch block, or a way to handle any exception that is unhanded in Monotouch.

Can I just wrap UIApplication.Main(args) in a try catch?

After the exception is caught, Id like to show a UIAlertView to display the results.

Any help?

Answer 1

You can wrap UIApplication.Main (args) in a try {} catch {} but you will not be able to show a UIAlertView at that point, since we've unwound the entire stack including all the UI. What you could do is log the exception to a crash file in the Documents folder of your application bundle, and show that on the next launch or upload it to a web service.

The Exceptioneer guys were working on MonoTouch support as well, which might be worth looking into.

Answer 2

I have had success with using the unhandled exception handler, ie AppDomain.CurrentDomain.UnhandledException event. This seems to catch many (but not all) unhandled exceptions. It seems that crashes that are in unmanaged code can cause the app to fail without calling this event.

Geoff : would capturing this event in addition to catching exceptions falling out of UIApplication.Main make sense or would one of the methods be preferred?