Number validation in required field validator

Question

Is it possible to put Number validation in required field validator in asp.net text box?

Answer 1

You should use the CompareValidator, for example:

<asp:TextBox ID="txt" runat="server />
<asp:CompareValidator ID="cv" runat="server" ControlToValidate="txt" Type="Integer"
   Operator="DataTypeCheck" ErrorMessage="Value must be an integer!" />

This is the most natural choice if you want a simple data type check. Otherwise if you want to verify a range use the RangeValidator suggestions. If you need a certain pattern use the RegularExpressionValidator.

Note that you'll want to add a RequiredFieldValidator as well since some validators will allow blank entries.