Dot Net Code Snippets

To validate US Zip Code

<asp:RegularExpressionValidator 
            ID="RegularExpressionValidator1"
            runat="server" 
            ValidationExpression="\d{5}(-\d{4})?"
            ControlToValidate="TextBox1"
            ErrorMessage="Input valid U.S. Zip Code!"
            ></asp:RegularExpressionValidator>