C# 服务端控件 asp:RadioButton 选择选中值

<asp:RadioButton ID="rbNewUser" runat="server" GroupName="user" Text="新用户注册"  />
<asp:RadioButton ID="rbExistUser" runat="server" GroupName="user" Text="已有用户注册"/>

var registType = $j("input[type='radio']:checked").next().text();

 <asp:RadioButtonList ID="rb_IsPublicPlan" runat="server"
                            RepeatColumns="5" RepeatDirection="Horizontal" RepeatLayout="Flow" CssClass="formradio">
                            <asp:ListItem Value="0">不公示</asp:ListItem>
                            <asp:ListItem Value="1">公示</asp:ListItem>
                        </asp:RadioButtonList>

$('#<%=rb_IsPublicPlan.ClientID%>').find('input:checked').val();