1.html代码
<HTML> <HEAD> <title>NestedDataLists</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://singlepine.cnblogs.com/"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <asp:DataList runat="server" Id="dlCategories" GridLines="Both" Bordercolor="black" cellpadding="3" cellspacing="0" Headerstyle-BackColor="#DDDDDD" Headerstyle-Forecolor="#777777" Headerstyle-Font-Name="Arial" Headerstyle-Font-Size="14" Headerstyle-Font-Bold="true" Font-Name="Arial" Font-Bold="true" Font-Italic="true" Font-Size="11" ForeColor="Red" RepeatColumns="1"> <HeaderTemplate> 省市 & 市区 </HeaderTemplate> <ItemTemplate>
<%# DataBinder.Eval(Container, "DataItem.province") %>
<br> <asp:DataList runat="server" Id="ChildDataList" GridLines="None" Bordercolor="black" cellpadding="3" cellspacing="0" Headerstyle-BackColor="#8080C0" Headerstyle-Font-Name="Arial" Headerstyle-Font-Size="8" Font-Name="Arial" Font-Size="8" datasource='<%# DataBinder.Eval(Container, "DataItem.myrelation") %>' RepeatColumns="5"> <ItemTemplate> <%# DataBinder.Eval(Container, "DataItem.city") %> </ItemTemplate> </asp:DataList> </ItemTemplate> </asp:DataList> </form> </body></HTML>public class NestedDataLists : System.Web.UI.Page {
protected System.Web.UI.WebControls.DataList dlCategories; private void Page_Load(object sender, System.EventArgs e)
{ string constring=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"]; DataSet ds=new DataSet(); string sql1="select * from province"; SqlDataAdapter sda1 =new SqlDataAdapter(sql1,constring); sda1.Fill(ds,"province"); string sql2="select * from city"; SqlDataAdapter sda2 =new SqlDataAdapter(sql2,constring); sda2.Fill(ds,"city"); ds.Relations.Add("myrelation", ds.Tables["province"].Columns["provinceID"], ds.Tables["city"].Columns["father"]); dlCategories.DataSource=ds.Tables["province"].DefaultView; dlCategories.DataBind();
} 
Web Form Designer generated code
}