用DataList实现一对多的关系

以前用DataGrid实现父子关系
父表ClassName

对应父表的ClassID的文章

但DataGrid好像不能并列排版，后来改用DataList
ChannelNewsArticleList.ascx

<%@ Control Language="c#" AutoEventWireup="false" Codebehind="ChannelNewsArticleList.ascx.cs" Inherits="Hover.Web.Article.Ascx.ChannelNewsArticleList" TargetSchema="http://schemas.microsoft.com/intellisense/ie5"%>
<asp:DataList id="DataList1" runat="server" RepeatColumns="2" RepeatDirection="Horizontal">
    <ItemTemplate>
        <TABLE width="278" border="0" valign="top" cellPadding="0" cellSpacing="0" >
            <TR>
                <TD align="top" width="278" background="images/wu.gif" height="40">
                <table width="100%" border="0" cellspacing="0" cellpadding="0">
                        <tr>
                            <td width="19%">&nbsp;</td>
                            <td width="81%"><font color="#000000" size=5><%# DataBinder.Eval(Container.DataItem,"classname")%></font></td>
                        </tr>
                    </table>
                </TD>
                <TD width="1" background="images/xu.gif"></TD>
            </TR>
            <TR>
                <TD height="200">&nbsp;<IMG src="images/none.gif" border="0"><IMG src="images/title.gif" border="0">
                    <asp:DataList ID=DataList2 runat=server DataSource='<%# FillDataList2()%>'>
                        <ItemTemplate>
                            <%# DataBinder.Eval(Container.DataItem,"ArticleTitle") %>
                        </ItemTemplate>
                    </asp:DataList>
                </TD>
                <TD width="1" background="images/xu.gif"></TD>
            </TR>
        </TABLE>
    </ItemTemplate>
</asp:DataList>

ChannelNewsArticleList.ascx.cs

namespace Hover.Web.Article.Ascx
{
    using System;
    using System.Data;
    using System.Drawing;
    using System.Web;
    using System.Web.UI.WebControls;
    using System.Web.UI.HtmlControls;

    /**//// <summary>
    ///        ChannelNewsArticleList 的摘要说明。
    /// </summary>
    public class ChannelNewsArticleList : System.Web.UI.UserControl
    {
        Hover.BusinessLayer.Article.ArticleBL obj=new Hover.BusinessLayer.Article.ArticleBL();
        protected System.Web.UI.WebControls.DataList DataList1;
        protected System.Web.UI.WebControls.Label Label1;
        private int ChannelIndex;
        private void Page_Load(object sender, System.EventArgs e)
        {
            // 在此处放置用户代码以初始化页面
            this.ShowNewArticleRelation();
            
        }
        /**//// <summary>
        /// 获得父表
        /// </summary>
        public void ShowNewArticleRelation()
        {
            DataSet ds=new DataSet();
            ds=obj.GetAllClass();                    
            this.DataList1.DataSource=ds;
            this.DataList1.DataKeyField="ClassID";
            this.DataList1.DataBind();        

        }
        
    
        /**//// <summary>
        /// 相对应的子表文章数据集供DataList2绑定数据源
        /// </summary>
        /// <returns></returns>
        public DataSet FillDataList2()
        {
            DataSet ds=new DataSet();
            ds=obj.GetArticleByClassID((int)this.DataList1.DataKeys[ChannelIndex]);
            return ds;
        }

        Web 窗体设计器生成的代码#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.ItemCreated += new System.Web.UI.WebControls.DataListItemEventHandler(this.DataList1_ItemCreated);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion
        /**//// <summary>
        /// 获得父表的ClassID索引
        /// 供子表根据ClassID读出相对应分类的文章
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void DataList1_ItemCreated(object sender, System.Web.UI.WebControls.DataListItemEventArgs e)
        {
            if(e.Item.ItemType==ListItemType.Item || e.Item.ItemType==ListItemType.AlternatingItem)
            {
                this.ChannelIndex=e.Item.ItemIndex;
            }
            
        }
    }
}

参考了Erist.Protal站点程序

效果参看http://bns.23city.com/
首页的asp.net和csahrp分类及分类下的文章。