ASP.NET ValidationGroup 屬性

<form runat="server">
<asp:RadioButtonList id="rb1"
ValidationGroup="valGroup1" runat="server">
  <asp:ListItem Value="Item 1" />
  <asp:ListItem Value="Item 2" />
</asp:RadioButtonList>

<asp:RequiredFieldValidator id="ReqField1"
ControlToValidate="rb1" ErrorMessage="Required"
ValidationGroup="ValGroup1" runat="server" />
<asp:Button id="Bt1" Text="Validate"
CausesValidation="True" ValidationGroup="ValGroup1"
runat="server" />
</form>