<input type="button" .... won't stop from submitting even the validation is falied?

[baroque Chou]

I add validation control to my page, but it seems it dosn't work using
input. is it true?

 

[Maarten]

That is correct.
validation control is a server control while input type button is a
client-side control.
So or write client-side validation code or use the server-side button with
custom validator.

Hope this helps.