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some time we require Only numbers can be enter by user into a Textbox for that We can use Regular expression validator in asp.net for this:
In the validation expression property keep ^\d+$.
Example:
In the validation expression property keep ^\d+$.
Example:
<asp:TextBox ID="txtnumber"
runat="server"
ValidationGroup="number"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1"
runat="server"
ControlToValidate="txtnumber"
ErrorMessage="Please Enter Only
Numbers" ValidationExpression="^\d+$" ValidationGroup="number"></asp:RegularExpressionValidator>
