RequiredFieldValidator not working.

Question

With the following simple mark-up, I get very strange behaviour in FF and IE8. If I give the textbox focus, and tab out, nothing happens. If I give a user name value, and erase it immediately, nothing happens. However, only when I supply a user name, tab away, the erase it and tab away again, do I finally get a red star "required" mark. The summary doesn't show at all.

This is the markup I was trying with. Looks like my issue was with EnableClientScript and ValidationGroup:

        <asp:Label ID="userNameLabel" runat="server" AssociatedControlID="userNameText">User Name:</asp:Label>
        <asp:TextBox ID="userNameText" runat="server" Width="200px"></asp:TextBox>
        <asp:RequiredFieldValidator ID="userNameRequired" runat="server" ControlToValidate="userNameText" Display="Dynamic" EnableClientScript="true" ValidationGroup="userValidation"
            ErrorMessage="User Name is always required.">*</asp:RequiredFieldValidator>

Answer 1

Are you sure EnableClientScript="true" is even needed? I think it defaults to that.