Not catching exceptions thrown in dll class

[Michael Rodriguez]

I have a data layer in a dll class. If I manually throw an exception in
that data layer, the generic Application.OnThreadException in my UI does not
catch it nor does it display any message whatsoever. The user is totally
unaware of the error.

How can I catch these errors without having to manually try...catch each
one?

Thanks,

Mike Rodriguez

 

[Bruce Wood]

Do you handle AppDomain.UnhandledException, too? I've never figured out
the "why" of the two of them, but some exceptions seem to be caught by
OnThreadException, while others are caught by UnhandledException.

 

[Guest]

Is this .NET 1.1 or .NET 2.0?
Bruce's indication is true; in .NET 1.1 not all unhandled exceptions on
other than the main thread blow up the app, the CLR will swallow them alive
(uggh).
Peter

 

[Michael Rodriguez]

Hi Peter,

I'm using .NET 2.0. I added an UnhandledException event handler, but that
still didn't catch it. It gets even weirder; check this out this event from
my business layer DLL:

public virtual void FillDetailTables(int index)
{


MessageBox.Show("Got to here");

// if thrown, this exception will be caught by the UI
// throw new Exception("Error!");

if ((numDetailTables > 0) &&
(!((BusinessBase)List[index]).DetailTablesFilled))
{
((BusinessBase)List[index]).DetailTablesFilled = true;

MessageBox.Show("Got to here also");

// if thrown, this exception will NOT be caught by the UI!!
// throw new Exception("Error!");
}

}


WTF??!!!

Mike Rodriguez

 

[Bruce Wood]

Could you post a short but complete program that illustrates this
behaviour? Here's what I mean by that:

http://www.yoda.arachsys.com/csharp/complete.html