C# CheckBoxList 单选

想让CheckBoxList 成为单选，要在选中事件时候绑定一个js方法

 <asp:CheckBoxList ID="cblComments" runat="server" OnSelectedIndexChanged="cblComments_SelectedIndexChanged" AutoPostBack="true">
        <asp:ListItem Text="Agree" Value="Agree" onclick="CheckCBLSimpleSelect(this)"></asp:ListItem>
        <asp:ListItem Text="Disagree" Value="Disagree" onclick="CheckCBLSimpleSelect(this)"></asp:ListItem>
</asp:CheckBoxList>

js方法为：

/*let CheckBoxList be Simple Checked*/
        function CheckCBLSimpleSelect(sender) {
            var container = sender.parentNode;
            if (container.tagName.toUpperCase() == "TD") { // 服务器控件设置呈现为 table 布局（默认设置），否则使用流布局
                container = container.parentNode.parentNode; // 层次： <table><tr><td><input />
            }
            var chkList = container.getElementsByTagName("input");
            var senderState = sender.checked;
            for (var i = 0; i < chkList.length; i++) {
                chkList[i].checked = false;
            }
            sender.checked = senderState;
            //checkTotal()//count checked checkbox num
        }