I need to add some custom validations for my form fields, beyond what can be done by regexes. I have created a custom validator using this approach, assigned it to the built-in Single-Line Text field type, but the form did not display any validation messages (the handler is setting
args.IsValid = false at all times for the testing purpose).
Thinking that something might be wrong with the custom implementation, I've tried to add the built-in "Email" validator to the Single-Line Text field, but nothing happened as well.
Just in case, I've republished the whole WFFM item and tested again to the same results.
Did anyone attempt to do the same? Anything I might have missed?