DataList嵌套实例

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DataList嵌套的重点是要在外层DataList的ItemDataBound事件中用e.Item.FindControl方法来找到嵌套层DataList的id,编写嵌套层DataList的绑定数据源事件，具体代码如下：

'--------前台代码DLNested.aspx：

<%@ Page language="c#" Codebehind="DLNested.aspx.cs" AutoEventWireup="false" Inherits="Example.DateListNested" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
  <title>DateListNested</title>
  <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
  <meta name="CODE_LANGUAGE" Content="C#">
  <meta name="vs_defaultClientScript" content="JavaScript">
  <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
  <style type="text/css">TD { FONT-SIZE: 12px; COLOR: #000000; FONT-FAMILY: "宋体" }
  </style>
</HEAD>
<body MS_POSITIONING="GridLayout">
  <form id="Form1" method="post" runat="server">
   <TABLE id="Table1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px" cellSpacing="1"
    cellPadding="1" width="100%" border="1" bordercolordark=white>
    <tr>
    <td><a href="Default.aspx">DataList分页、编辑实例</a></td>
    </tr>
    <TR>
     <TD>
      <asp:DataList id="DataList1" runat="server" RepeatColumns="3">
       <ItemTemplate>
        <FONT face="宋体">
         <TABLE cellSpacing="1" cellPadding="1" width="100%" border="1" bordercolordark=white>
          <TR>
           <TD><FONT face="宋体" color="red">
             <asp:Label id=Label1 runat="server" Text='<%# Container.ItemIndex + ":" + DataBinder.Eval(Container.DataItem,"C_TypeName")%>' >
             </asp:Label>
             <asp:Label id="lblTypeId" runat="server" Visible=False Text='<%# DataBinder.Eval(Container.DataItem,"I_TypeID")%>' >
             </asp:Label>
             </FONT></TD>
          </TR>
          <TR>
           <TD>
            <asp:DataList id="DataList2" runat="server">
             <ItemTemplate>
              <TABLE cellSpacing="1" cellPadding="1" width="100%" border="1" bordercolordark=white>
               <TR>
                <TD>
                 <asp:Label id=Label2 runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"C_Name") %>'>
                 </asp:Label></TD>
               </TR>
              </TABLE>
              <FONT face="宋体"></FONT>
             </ItemTemplate>
             <AlternatingItemTemplate>
              <TABLE cellSpacing="1" cellPadding="1" width="100%" border="1" bordercolordark=white>
               <TR>
                <TD><FONT face="宋体" color=#003333>
                 <asp:Label id="Label6" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"C_Name") %>'>
                 </asp:Label></font></TD>
               </TR>
              </TABLE>
              <FONT face="宋体"></FONT>
             </AlternatingItemTemplate>
            </asp:DataList></TD>
          </TR>
         </TABLE>
        </FONT>
       </ItemTemplate>
       <AlternatingItemTemplate>
        <FONT face="宋体">
         <TABLE cellSpacing="1" cellPadding="1" width="100%" border="1" bordercolordark=white>
          <TR>
           <TD><FONT face="宋体" color="red">
             <asp:Label id=Label3 runat="server" Text='<%# Container.ItemIndex + ":" + DataBinder.Eval(Container.DataItem,"C_TypeName") %>'>
             </asp:Label>
             <asp:Label id="lblTypeID1" runat="server" Visible=False Text='<%# DataBinder.Eval(Container.DataItem,"I_TypeID")%>' >
             </asp:Label>
             </FONT></TD>
          </TR>
          <TR>
           <TD>
            <asp:DataList id="Datalist3" runat="server">
             <ItemTemplate>
              <TABLE cellSpacing="1" cellPadding="1" width="100%" border="1" bordercolordark=white>
               <TR>
                <TD>
                 <asp:Label id="Label4" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"C_Name") %>'>
                 </asp:Label></TD>
               </TR>
              </TABLE>
              <FONT face="宋体"></FONT>
             </ItemTemplate>
             <AlternatingItemTemplate>
              <TABLE cellSpacing="1" cellPadding="1" width="100%" border="1" bordercolordark=white>
               <TR>
                <TD><FONT face="宋体" color="#003333">
                 <asp:Label id="Label5" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"C_Name") %>'>
                 </asp:Label></font></TD>
               </TR>
              </TABLE>
              <FONT face="宋体"></FONT>
             </AlternatingItemTemplate>
            </asp:DataList></TD>
          </TR>
         </TABLE>
        </FONT>
       </AlternatingItemTemplate>
      </asp:DataList></TD>
    </TR>
   </TABLE>
  </form>
</body>
</HTML>

'--------后台代码DLNested.aspx.cs：

/*----------------------------------------------------------------
// 版权所有: 亿思维软件工作室
// 网站地址: Http://www.easewe.com
// 联系方式: 87015203(QQ),easewe@126.com(Email)
// 整理日期: 2005.09.14
//----------------------------------------------------------------*/
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

using System.Data.OleDb;
namespace Example
{
    /// <summary>
    /// DateListNested 的摘要说明。
    /// </summary>
    public class DateListNested : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.DataList DataList1;
        protected string connString;

        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            connString = @"Provider=Microsoft.Jet.OleDb.4.0;Data Source=" + Request.PhysicalApplicationPath + "DataList.mdb";
            if ( !Page.IsPostBack )
            {
                BindData();
                //BindArticle();
            }
        }

        private void BindData()
        {
            string commandText = "select * from ArticleType";
            //----------
            OleDbConnection conn = new OleDbConnection();
            conn.ConnectionString = connString;
            conn.Open();
            OleDbDataAdapter da = new OleDbDataAdapter(commandText,conn);
            DataSet ds = new DataSet();
            da.Fill(ds,"ArticleType");
            conn.Close();
            //----------
            DataList1.DataSource = ds.Tables["ArticleType"];
            DataList1.DataBind();
        }

        #region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }

        /// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.DataList1.ItemDataBound += new System.Web.UI.WebControls.DataListItemEventHandler(this.DataList1_ItemDataBound);
            this.Load += new System.EventHandler(this.Page_Load);

}
#endregion

        private void DataList1_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)
        {
            if ( e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem )
            {
                DataList dl = null;
                Label lblTypeID = null;
                if ( e.Item.ItemType == ListItemType.Item )
                {
                    dl = (DataList)e.Item.FindControl("DataList2");
                    lblTypeID = (Label)e.Item.FindControl("lblTypeID");
                }
                else
                {
                    dl = (DataList)e.Item.FindControl("DataList3");
                    lblTypeID = (Label)e.Item.FindControl("lblTypeID1");
                }
                string typeID = lblTypeID.Text.ToString();
                string commandText = "select * from Article";
                commandText = commandText + " Where I_TypeID=" + typeID;
                //------------
                OleDbConnection conn = new OleDbConnection();
                conn.ConnectionString = connString;
                conn.Open();
                OleDbDataAdapter da = new OleDbDataAdapter(commandText,conn);
                DataSet ds = new DataSet();
                da.Fill(ds,"Article");
                conn.Close();
                //------------
                dl.DataSource = ds.Tables["Article"];
                dl.DataBind();
            }

}
}
}

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