How to use regular expression validator to allow only integer (numbers) not string in textbox in asp.net c#
Javascript or Jquery not required to validate numeric character not string. We can simply use regex validation control to achive this.
Sample code:
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" ControlToValidate="TextBox1" runat="server" ErrorMessage="Numbers Only allowed" ValidationExpression="\d+"></asp:RegularExpressionValidator>
To allow specific count of numbers, use the following regex expression
ValidationExpression="
^\d{7}$"> //Allows only 7 digit of char
ValidationExpression="
^\d{10}$"> //Allows only 10 digit of char