前臺代碼
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="datalist嵌套.aspx.cs" Inherits="datalist嵌套" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:DataList ID="DataList1" runat="server"
onitemdatabound="DataList1_ItemDataBound" Width="175px">
<ItemTemplate>
fathertype:
<asp:Label ID="fathertypeLabel" runat="server"
Text='<%# Eval("fathertype") %>' />
<br />
<asp:DataList ID="DataList2" runat="server" Width="198px">
<ItemTemplate>
childtype:
<asp:Label ID="childtypeLabel" runat="server" Text='<%# Eval("childtype") %>' />
<br />
<br />
</ItemTemplate>
</asp:DataList>
<br />
</ItemTemplate>
</asp:DataList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT distinct [fathertype] FROM [goodsclass]">
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDataSource2" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT [childtype] FROM [goodsclass] WHERE ([fathertype] = @fathertype)">
<SelectParameters>
<asp:SessionParameter Name="fathertype" SessionField="father" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
</div>
</form>
</body>
</html>
後臺代碼：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
public partial class datalist嵌套 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.DataList1.DataSource = this.SqlDataSource1;
this.DataList1.DataBind();
}
}
protected void DataList1_ItemDataBound(object sender, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item ||
e.Item.ItemType == ListItemType.AlternatingItem)
{
System.Data.DataRowView drv =
(System.Data.DataRowView)(e.Item.DataItem);
string quantity = drv.Row["fathertype"].ToString();
Session["father"] = quantity;
DataList dataList2 = (DataList)e.Item.FindControl("DataList2");
dataList2.DataSource = this.SqlDataSource2;
dataList2.DataBind(); //同樣需要動態綁定
}
}
}