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Categories / ASP.Net Tutorial / Validation

 

Use Regular expression to validate a Phone number

< html>< body>    <form runat="server">       <asp:Label id="lblMessage" runat="server" /><br>       <asp:Panel id="Panel1" runat="server">          <table>          <tr>             <td valign="top">Phone (<i>xxx-xxxx</i>):</td>             <td valign="top">                <asp:TextBox id="tbPhone" runat="server"                   size=11 /><br>                <asp:RegularExpressionValidator runat="server"                   ControlToValidate="tbPhone"                   ValidationExpression="[0-9]{3}-[0-9]{4}"                   ErrorMessage="That is not a valid phone" />             </td>          </tr>          <tr>             <td colspan="2" valign="top" align="right">                <asp:Button id="Submit" runat="server"                    text="Add" />             </td>          </tr>          </table>       </asp:Panel>    </form> </body></html>