ASP.NET Custom Validation
How annoying, “If the input control is empty, no validation functions are called and validation succeeds. Use a RequiredFieldValidator control to require the user to enter data in the input control. “
The missing parameter you need to set is ValidateEmptyText=”true”.
Wasted a good half hour finding that little oddity.
Fri Apr 17 2009 17:43:00 GMT-0700 (Pacific Daylight Time)