Enterprise Library: pass arguments to WrapHandler & ReplaceHandler?

microsoft.public.dotnet.framework

5 Oct 2005 3:34 PM

pseudoLatino

hello all

I'm retrofitting some code to use the EHAB from the EL. The standard
way of writing EL Exception code is as follows:

try {
// run code
}
catch(Exception ex){
bool rethrow = ExceptionPolicy.HandleException(ex, "Wrap Policy");
if (rethrow)
throw;
}

The problem is that wrapping an exception (or replacing it) doesn't do
a whole lot of good if I can't set some properties on the
wrapping/replacing exception--or at least pass some arguments to the
constructor. Of course I can set a default message for the exception
via configuration, but that's nearly useless in a real application
(perhaps "radically insufficient" would be better than "useless," but
you get the drift). I need to attach dynamic, runtime info to the new
exception, but would like to know if I can do it without coding things
the usual way, i.e.

try {
// run code
}
catch(Exception ex) {
// doing things the old way
UsefulException uex = new UsefulException( "SomeMessage", ex );
uex.SomeAdditionalInfo.Add( "CompanyID", _executingCompanyID );
uex.SomeAdditionalInfo.Add( "ProcessingGuid", currentGuid );

bool rethrow = ExceptionPolicy.HandleException( uex,
"LogAndReportPolicy");
if (rethrow)
throw;
}

Many thanks in advance
---the PseudoLatino

P.S. Can anyone give me a good example of where/how/why you're using
the Replace/WrapHandlers?