This one-line code seemed to return a response of "false" even if a single integer was entered.
Any code can be removed without warning (if it is deemed offensive, damaging or for any other reason).
By Bill Evjen Reuters December 2003 Applies to: Microsoft® ASP. NET validation server controls that are at your disposal.
NET Summary: Learn how to use all the available ASP.
The original question, however, was interested in preventing the non-numeric entry entirely.
I'm pretty sure Java Script is still the only way to do this.