asp.net <asp:Repeater>下的radio的单选使用

aspx页面

 <asp:Repeater ID="rptData" runat="server">
                                        <ItemTemplate>
                                            <tr id="trRemark" <%# Container.ItemIndex%==?"class=\"even\"":" class=\"odd\"" %>>
                                                <td>
                                                    <input type="radio" value='<%# Eval("id")%>' name="radio_Box" id="radio_Box" class="C_B" runat="server" onclick="selectSingleRadio(this,'radio_Box')" />

                                                </td>
                                                <td>

js模块

        function selectSingleRadio(rbtn, GroupName) {
            //alert(rbtn + "==" + GroupName);
            $("input[type=radio]").each(function (i) {
                if (this.name.substring(this.name.length - GroupName.length) == GroupName) {
                    this.checked = false;
                }
            })
            rbtn.checked = true;
        }

后台

        //保存数据
        protected void SaveBtn_Click(object sender, EventArgs e)
        {

            string economicId;
            foreach (RepeaterItem item in this.rptData.Items) //repeater的Id
            {
                HtmlInputRadioButton economic = (HtmlInputRadioButton)item.FindControl("radio_Box");
                if (economic.Checked)
                {
                    economicId = economic.Value.ToString();
                }
            }  

        }