Handling the InternalException or an application crash from the add-in.

[Anonymous]

Hello,

I have an add-in that monitors open document elements, read-only, figuring how many sheets, links, families etc., using a bunch of IUpdaters, and further sends them off to an external server for some usage analysis. I would like to be able to detect a crash in the application, before the "Unrecoverable error has occurred" dialog, so I can flag my monitoring data with the last result as "crashed", which would help me with the analysis.

I have to say that I am simulating a crash by running two FilteredElementCollectors in a BackgroundWorker, I know, blasphemy. This causes an InternalException with the error/submit report dialog.

What I've tried so far:

- As per The Building Coder: http://thebuildingcoder.typepad.com/blog/2013/10/handle-your-own-exceptions-and-edit-slab-boundaries... subscribing to the App.Domain.CurrentDomain.UnhandledException doesn't work for me and the handler doesn't get called.

- FailureProcessor and FailurePreprocessor don't work with the InternalException, perhaps I need a better crashing sample file.

- A watchdog application (wrapper) that calls the Revit executable and looks at the exit code/reads the journal file, this works, but would be better to have a self-contained solution.

What I'm trying to achieve:

- Before Revit throws and exists, I collect some bits of info, timestamps (no longer need RevitAPI), and make a POST to a webapi with this info.

Is this possible?

Thank you,

Alex

[Anonymous]

AppDomain.CurrentDomain.FirstChanceException += CurrentDomainOnFirstChanceException;

public static void CurrentDomainOnFirstChanceException(object sender, FirstChanceExceptionEventArgs e)
{
    if (e.Exception is InternalException) {
        MessageBox.Show($"{e.Exception.Source}{e.Exception.StackTrace}\n {e.Exception.Message}");
    }
}

This seems to be doing the job actually, even though it gets fired on every single exception before the application gets the chance to handle it internally. The add-in remains loaded and I can get some information out and post some data to my server. I would love to hear other ideas though!