How can I apply custom validation to Infopath 2010 fields which stretches beyond the basic Rules and Templates?
I am looking to validate a custom field which needs to be validated much like a Credit Card Number. The field itself needs to be a template of ###-###-### but needs to be validated with the Luhn Algorithm like Credit Card Numbers are. I can do this with C# but am unsure of how to apply C# Validation to an Infopath field.
Is this possible, and if so how can I go about doing this?