Catching Ironpython Exception in C#

Question

I'm embedding IronPython 2.0 in C#. In IronPython, I defined my own exception with:

def foobarException(Exception):
    pass 

and raise it somewhere with:

raise foobarException( "This is the Exception Message" )

Now in C#, I have:

try
{
   callIronPython();
}
catch (Exception e)
{
   // How can I determine the name (foobarException) of the Exception
   // that is thrown from IronPython?   
   // With e.Message, I get "This is the Exception Message"
}

Answer 1

When you catch an IronPython exception from C#, you can use the Python engine to format the traceback:

catch (Exception e)
{
    ExceptionOperations eo = _engine.GetService<ExceptionOperations>(); 
    string error = eo.FormatException(e); 
    Console.WriteLine(error);
}

You can pull the exception name out of the traceback. Otherwise, you will have to call into the IronPython hosting API to retrieve information directly from the exception instance. engine.Operations has useful methods for these kinds of interactions.