I added one of these a while ago and figured I would include another. Dynamic AJAX Toolkit Controls seem to really be an issue for some, so I hope this helps. This time, we will create a dynamic ValidatorCallout for a TextBox with a RequiredFieldValidator (although you can use any validation method). One other thing to note on the ValidatorCallout is that it only works with client-side validation.
Hi, my name is Damien White. I'm a software architect with over 20 years of experience. I simply love coding! I have a driving passion for software development, and a thirst for knowledge that cannot be quenched. I enjoy writing Web and Mobile applications, and I'm happy to share what I know in my quest to learn as much as possible.