<!DOCTYPE html>
<html>
<body>
<form runat="server">
<p>ValidationGroup 1</p>
<p>You must select one item in the list (Test with no items selected to get error)</p>
<p>Age:</p>
<asp:RadioButtonList id="rb1" ValidationGroup="valGroup1" runat="server">
<asp:ListItem Value="Over 21" />
<asp:ListItem Value="Under 21" />
</asp:RadioButtonList>
<asp:RequiredFieldValidator id="ReqField1"
ControlToValidate="rb1" ValidationGroup="ValGroup1"
ErrorMessage="Required" runat="server" />
<asp:Button id="Bt1" Text="Validate" runat="server"
CausesValidation="True" ValidationGroup="ValGroup1" />
<p>ValidationGroup 2</p>
<p>You must select one item in the list (Test with no items selected to get error)</p>
<p>Gender:</p>
<asp:RadioButtonList id="rb2" ValidationGroup="valGroup2" runat="server">
<asp:ListItem Value="Male" />
<asp:ListItem Value="Female" />
</asp:RadioButtonList>
<asp:RequiredFieldValidator id="ReqField2"
ControlToValidate="rb2" ValidationGroup="ValGroup2"
ErrorMessage="Required" runat="server" />
<asp:Button id="Bt2" Text="Validate" runat="server"
CausesValidation="True" ValidationGroup="ValGroup2" />
</form>
</body>
</html>