//aspx
<%@ Page language="c#" Codebehind="DataListNesting.aspx.cs" AutoEventWireup="false" Inherits="DataListNesting" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>DataListNesting</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">
<script type="text/javascript">
function showorhide(showID,imageID){
if(document.getElementById(imageID).src == "http://localhost/WebDemo/images/down.gif")
{
if(document.getElementById(showID) != null)
document.getElementById(showID).style.display = "none";
document.getElementById(imageID).src = "http://localhost/WebDemo/images/up.gif";
}
else
{
if(document.getElementById(showID) != null)
document.getElementById(showID).style.display = "block";
document.getElementById(imageID).src = "http://localhost/WebDemo/images/down.gif";
}
// alert (showID);
return false;
}
</script>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:datalist id="DataList1" runat="server" DataKeyField="au_id" BorderWidth="1px" GridLines="Both"
CellPadding="4" BackColor="White" BorderStyle="None" BorderColor="#CC9966">
<SelectedItemStyle Font-Bold="True" ForeColor="#663399" BackColor="#FFCC66"></SelectedItemStyle>
<FooterStyle ForeColor="#330099" BackColor="#FFFFCC"></FooterStyle>
<ItemStyle ForeColor="#330099" BackColor="White"></ItemStyle>
<ItemTemplate>
au_id:
<asp:Label id=Label1 runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "au_id")%>'>
</asp:Label><BR>
au_lname:
<asp:Label id=Label2 runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "au_lname")%>'>
</asp:Label><BR>
<asp:ImageButton id="ibtnUpDown" runat="server"
CommandName="ibtnUpDown"
ImageUrl="images/up.gif"></asp:ImageButton><BR>
<asp:DataList id=DataList2 runat="server" BorderWidth="1px"
GridLines="Both" CellPadding="4" BackColor="White" BorderStyle="None"
BorderColor="#CC9966" DataKeyField="Title_id" DataSource='<%#
GetTitleID(DataBinder.Eval(Container.DataItem, "au_id").ToString())
%>'>
<SelectedItemStyle Font-Bold="True" ForeColor="#663399" BackColor="#FFCC66"></SelectedItemStyle>
<FooterStyle ForeColor="#330099" BackColor="#FFFFCC"></FooterStyle>
<ItemStyle ForeColor="#330099" BackColor="White"></ItemStyle>
<ItemTemplate>
title_id:
<asp:Label id="Label4" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "title_id")%>'>
</asp:Label><BR>
</ItemTemplate>
<HeaderStyle Font-Bold="True" ForeColor="#FFFFCC" BackColor="#990000"></HeaderStyle>
</asp:DataList>
</ItemTemplate>
<HeaderStyle Font-Bold="True" ForeColor="#FFFFCC" BackColor="#990000"></HeaderStyle>
</asp:datalist></form>
</body>
</HTML>
//aspx.cs
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.SqlClient;
public class DataListNesting : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataList DataList1;
private void BindList()
{
SqlConnection cn = new SqlConnection("server=.;uid=sa;pwd=sa;database=pubs");
SqlDataAdapter da = new SqlDataAdapter("select au_id,au_lname from authors", cn);
DataSet ds = new DataSet();
cn.Open();
da.Fill(ds);
cn.Close();
DataList1.DataSource = ds;
DataList1.DataBind();
}
public DataView GetTitleID(string au_id)
{
SqlConnection cn = new SqlConnection("server=.;uid=sa;pwd=sa;database=pubs");
SqlDataAdapter da = new SqlDataAdapter("select au_id, title_id from titleauthor where au_id = @au_id", cn);
da.SelectCommand.Parameters.Add("@au_id", SqlDbType.VarChar, 11).Value = au_id;
DataSet ds = new DataSet();
cn.Open();
da.Fill(ds);
cn.Close();
return ds.Tables[0].DefaultView;
}
private void Page_Load(object sender, System.EventArgs e)
{
if(!IsPostBack)
{
BindList();
}
}
private void DataList1_ItemDataBound(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)
{
ImageButton ibtnUpDown;
DataList DataList2;
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
DataList2 = (DataList) e.Item.FindControl("DataList2");
if (DataList2 != null)
DataList2.Attributes.Add("style", "display:none");
ibtnUpDown = (ImageButton) e.Item.FindControl("ibtnUpDown");
if(ibtnUpDown != null)
ibtnUpDown.Attributes.Add("onclick","return showorhide('" + DataList2.ClientID + "','" + ibtnUpDown.ClientID + "');");
}
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
InitializeComponent();
base.OnInit(e);
}
private void InitializeComponent()
{
this.DataList1.ItemDataBound += new System.Web.UI.WebControls.DataListItemEventHandler(this.DataList1_ItemDataBound);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
}
