很急很急很急 两个repeater嵌套 外层的按钮的单击事件不起作用，

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

namespace Publisher.web.Management.BookSystem
{
    public partial class booktype : System.Web.UI.Page
    {
        public readonly Bll.Book.BookType bllBookType = new Publisher.Bll.Book.BookType();
        protected void Page_Load(object sender, EventArgs e)
        {

            if (Request.QueryString["fixid"] != null)
            {
                string fixid = Request.QueryString["fixid"];
                Model.Book.booktype modbooktype = bllBookType.GetModel(int.Parse(Common.DESEncrypt.Decrypt(fixid)));
                txtTypename.Text = modbooktype.TypeName;
                dplParentType.Items.FindByValue(modbooktype.TypeID.ToString()).Selected = true;
            }
            // rptBookTypeRoot.ItemCommand+=new RepeaterCommandEventHandler(rptBookTypeRoot_ItemCommand);
            //绑定repeater控件
            if (!IsPostBack)
            {
                BindRepeater();
            }

        }

        protected void BindRepeater()
        {
            DataSet dsRootlist = bllBookType.GetList("ParentID = 0");
            rptBookTypeRoot.DataSource = dsRootlist;
            rptBookTypeRoot.DataBind();
            //绑定根类型类表（新增）
            ListItem listItRoot = new ListItem("根类型", "0");
            dplParentType.DataSource = dsRootlist;
            dplParentType.DataTextField = "typename";
            dplParentType.DataValueField = "typeid";
            dplParentType.DataBind();
            dplParentType.Items.Insert(0, listItRoot);
            //绑定根类型类表（新增）
            dplFixParentType.DataSource = dsRootlist;
            dplFixParentType.DataTextField = "typename";
            dplFixParentType.DataValueField = "typeid";
            dplFixParentType.DataBind();

            dplFixParentType.Items.Insert(0, listItRoot);


        }

        /// <summary>
        /// 绑定内层数据列表
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void rptBookTypeRoot_ItemDataBound(object sender, RepeaterItemEventArgs e)
        {

            //判断里层repeater处于外层repeater的哪个位置（ AlternatingItemTemplate，FooterTemplate，

            //HeaderTemplate，，ItemTemplate，SeparatorTemplate）
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {
                Repeater rptTemp = e.Item.FindControl("rptItemList") as Repeater;//找到里层的repeater对象
                DataRowView rowv = (DataRowView)e.Item.DataItem;//找到分类Repeater关联的数据项 
                rptTemp.DataSource = bllBookType.GetList("ParentID=" + rowv["TypeID"]);
                rptTemp.DataBind();


            }
        }

        //


        //protected void rptBookTypeRoot_ItemCommand(object sender, RepeaterCommandEventArgs e)
        //{
        //    Response.Write("fuck");
        //}
        //


        /// <summary>
        /// 删除类型用方法
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
//这里设置的断点就是不执行！！！！郁闷的要屎掉了
        protected void lbtnDelItem_Click(object sender, RepeaterCommandEventArgs e)
        {
            if (e.CommandName == "del")
            {
                Response.Write("fuck");
            }

            //if (e.CommandSource.ToString() == "System.Web.UI.WebControls.LinkButton")
            //{
            //    LinkButton lbtn = (LinkButton)e.CommandSource;

            //    bllBookType.Delete(int.Parse(lbtn.CommandArgument.ToString()));
            //    BindRepeater();
            //}
        }
        /// <summary>
        ///保存新增 类型
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnAdd_Click(object sender, EventArgs e)
        {
            Model.Book.booktype modBooktype = new Publisher.Model.Book.booktype();
            modBooktype.TypeName = txtTypename.Text;
            modBooktype.ParentID = int.Parse(dplParentType.SelectedValue);
            if (modBooktype.TypeName != "")
            {
                if (bllBookType.Add(modBooktype) > 0)
                {

                    BindRepeater();
                }
            }
            clearform();

        }
        /// <summary>
        /// 保存修改的类型
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void btnSave_Click(object sender, EventArgs e)
        {

        }
        /// <summary>
        /// 表单清理
        /// </summary>
        protected void clearform()
        {
            txtTypename.Text = "";
            txtFixname.Text = "";
        }
    }
}
aspx的代码
[code=HTML]<%@ Page Title="" Language="C#" MasterPageFile="~/Management/SystemMaster.Master"
    AutoEventWireup="true" CodeBehind="booktype.aspx.cs" Inherits="Publisher.web.Management.BookSystem.booktype" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
    <link href="css/booktype.css" rel="stylesheet" type="text/css" />

    <script src="../script/booktype.js" type="text/javascript"></script>

</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <div>
        <fieldset style="border: 1px solid #116699">
            <legend>添加新类型</legend>
            <div>
                <h2>
                    添加根类型</h2>
                <label>
                    类型名称：<asp:TextBox runat="server" ID="txtTypename"></asp:TextBox></label>
                <label>
                    所属类型：
                    <asp:DropDownList runat="server" ID="dplParentType">
                    </asp:DropDownList>
                </label>
                <asp:Button runat="server" ID="btnAdd" Text="添加" OnClick="btnAdd_Click" />
            </div>
        </fieldset>
        <fieldset style="border: 1px solid #006699">
            <legend>修改类型</legend>
            <div class="alltype">
                <asp:Repeater runat="server" ID="rptBookTypeRoot" OnItemDataBound="rptBookTypeRoot_ItemDataBound"
                    OnItemCommand="lbtnDelItem_Click">
                    <ItemTemplate>
                        <h2>
                            <%#Eval("TypeName")%>ID=<%#Eval("TypeID")%>
    
                            <asp:Button runat="server" ID="btn3" CommandName="del" OnClientClick="{if(confirm('确定要删除记录吗?')){return true;}return false;}"
                                CssClass="linkDel" />
                        </h2>
                        <asp:Repeater runat="server" ID="rptItemList">
                            <HeaderTemplate>
                                <ul>
                            </HeaderTemplate>
                            <ItemTemplate>
                                <li>
                                    <%#Eval("TypeName") %><asp:Button runat="server" ID="LinkButton2" CommandArgument='<%#Eval("TypeID") %>'
                                        OnClientClick="{if(confirm('确定要删除记录吗?')){return true;}return false;}" CssClass="linkDel" />
                                </li>
                            </ItemTemplate>
                            <FooterTemplate>
                                </ul>
                            </FooterTemplate>
                        </asp:Repeater>
                    </ItemTemplate>
                </asp:Repeater>
            </div>
            类型名称：<asp:TextBox ID="txtFixname" runat="server"></asp:TextBox>
            所属类型：<asp:DropDownList runat="server" ID="dplFixParentType">
                <asp:ListItem Value="0" Text="根类型"></asp:ListItem>
            </asp:DropDownList>
            <asp:Button Text="保存" runat="server" ID="btnSave" OnClick="btnSave_Click" />
        </fieldset>
    </div>
</asp:Content>