repeater中嵌套repeater(vs2005)

后台:
protected void favFolderRepeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
        {
            Repeater favFolderFileRepeater = (Repeater)e.Item.FindControl("favFolderFileRepeater");
            System.Data.Common.DbDataRecord newRow = (System.Data.Common.DbDataRecord)e.Item.DataItem;
            int parentId = Convert.ToInt32(newRow["this_id"]);
            //Response.Write(parentId);
            string connStr = ConfigurationManager.AppSettings[0].ToString();
            SqlConnection conn = new SqlConnection(connStr);
            string cmdStr = "select this_id,this_title,this_url,this_tip,this_color from userFav where this_name = @this_name and parent_id=@parent_id order by order_id";
            SqlCommand comm = new SqlCommand(cmdStr, conn);
            comm.Parameters.AddWithValue("@this_name", User.Identity.Name);
            comm.Parameters.AddWithValue("@parent_id",parentId);
            conn.Open();
            SqlDataReader dr = comm.ExecuteReader();
            favFolderFileRepeater.DataSource = dr;
            favFolderFileRepeater.DataBind();
            dr.Close();
            conn.Close();
        }
前台:
<td width="50%" valign="top" id="folderTd">
             <asp:Repeater ID="favFolderRepeater" runat="server" OnItemDataBound="favFolderRepeater_ItemDataBound">
                <ItemTemplate>
                    <div id='<%#"div"+Eval("this_id") %>'><img src="images/folder.gif" alt="" style="border:0px;" /><%#Eval("this_title") %>
                         <asp:Repeater ID="favFolderFileRepeater" runat="server">
                            <ItemTemplate>
                               <div style="margin-left:20px;">
                                  <a id='<%#Eval("this_id") %>' title='<%#Eval("this_tip") %>' target="_blank" href='<%#Eval("this_url") %>' style='height:15;position:relative;color:<%# Eval("this_color") %>' onclick="return this.clickReturnValue;"><%#Eval("this_title") %></a>
                               </div>
                            </ItemTemplate>
                         </asp:Repeater>
                    </div>
                </ItemTemplate>
             </asp:Repeater>
         </td>