Dot Net Code Snippets

Validate US Phone number

<asp:RegularExpressionValidator
           ID="RegularExpressionValidator1"
           runat="server"
           ValidationExpression="((\(\d{3}\) ?)|(\d{3}-))?\d{3}-\d{4}"
           ControlToValidate="TextBox1"
           ErrorMessage="Input valid U.S. Phone Number!"
           ></asp:RegularExpressionValidator>