>I have a ASP.Net webform that contains a textbox where a user should enter a date in mm/dd/yy format.
>
>How can I validate that the user enter a good date?
>
>Thanks,
>
>Jerry
Here is a simple way

        <asp:RequiredFieldValidator runat="server" Display="Dynamic" ControlToValidate="txtDOB" ErrorMessage="DOB is required.<br>"	ID="Requiredfieldvalidator2"></asp:RequiredFieldValidator>
        <asp:RegularExpressionValidator runat="server" Display="Dynamic" ControlToValidate="txtDOB" ErrorMessage="DOB is required as mm/dd/yyyy.<br>" ID="RegEDOB" ValidationExpression="\d{2}\/\d{2}\/\d{4}"/>