Un required validator pentru DropDownList cu RangeValidator

Validatorul RangeValidator va aparea in UI ca un RequiredValidator. Utilizatorul nu va putea trece mai departe daca nu alege o optiune de la 1 la 5. :)

<asp:DropDownList ID="ddlTitle" runat="server">
       <asp:ListItem Value="0">Select Title</asp:ListItem>
       <asp:ListItem Value="1">Mr</asp:ListItem>
       <asp:ListItem Value="2">Mrs</asp:ListItem>
       <asp:ListItem Value="3">Miss</asp:ListItem>
       <asp:ListItem Value="4">Ms</asp:ListItem>
       <asp:ListItem Value="5">Dr</asp:ListItem>
</asp:DropDownList>

<asp:RangeValidator ID="rangeValidator" 
       Text="*"
       ErrorMessage="The title is required."
       ControlToValidate="ddlTitle"
       Type="Integer" 
       MinimumValue="1" 
       MaximumValue="5" 
       runat="server" 
></asp:RangeValidator>

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