%@ Page Language="C#" AutoEventWireup="true" CodeFile="home.aspx.cs" Inherits="home" %>
body>
  form id="form1" runat="server">
       asp:DataList ID="monitorTypeList" runat="server" RepeatColumns="4" 
         onitemdatabound="monitorTypeList_ItemDataBound" RepeatDirection="Horizontal" ItemStyle-VerticalAlign="Top">
       ItemTemplate>
        table class="conBox" width="186" border="0" cellpadding="0" cellspacing="1" style="margin-right:10px;">
         tr>
          th>a href="%#Eval("plugpath") %>">%#Eval("monitor_type_name") %>/a>/th>
         /tr>
         asp:Repeater ID="monitorConfigList" runat="server">
          ItemTemplate>
         tr>
          td>a href="%#Eval("plugpath") %>?monitor_id=%#Eval("monitor_id") %>">%#Eval("monitor_name") %>/a>/td>
         /tr>
          /ItemTemplate>
         /asp:Repeater>
        /table>
      /ItemTemplate>
      /asp:DataList>
  /form>
/body>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class home : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
    myCheck.IsLoginNonReturn();
    if (!IsPostBack)
    {
      Bind_monitorTypeList();
    }
  }
  protected void Bind_monitorTypeList()
  {
    string sql = "select monitor_type_id,monitor_type_name from monitor_type";
    DbConn conn = new DbConn();
    DataSet ds = conn.DataSet(sql,"monitor_type");
    monitorTypeList.DataSource = ds.Tables[0];
    monitorTypeList.DataBind();
    ds.Dispose();
    conn.Close();
  }
  protected void monitorTypeList_ItemDataBound(object sender, DataListItemEventArgs e)
  {
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
      string monitor_type_id = ((DataRowView)e.Item.DataItem).Row["monitor_type_id"].ToString();
      Repeater monitorConfigList = (Repeater)e.Item.FindControl("monitorConfigList");
      if (monitorConfigList != null)
      {
        string sql = "select monitor_id,nonitor_name,plugpath from monitor where monitor_type_id=" + monitor_type_id;
        DbConn conn = new DbConn();
        DataSet ds = conn.DataSet(sql, "monitor");
        monitorConfigList.DataSource = ds.Tables[0];
        monitorConfigList.DataBind();
        ds.Dispose();
        conn.Close();
      }
    }
  }
}