asp.net validation control for only TEXT input

Question

What validation control would I need if I want the user to enter only TEXT characters in a textbox and what would be the validation expression?

Answer 1

If you want to use an ASP.NET component to do this, it's the RegEx validator. Plug this in as the expression, it will only allow alpha characters, which is what I assume you mean by TEXT.

^[a-zA-Z]*$