XML File
<?xml version="1.0" encoding="utf-8" ?>
<Area iAreaID ="0" cAreaName="城市">
<Province iAreaID ="1" cAreaName="北京市"/>
<Province iAreaID ="2" cAreaName="上海市"/>
<Province iAreaID ="3" cAreaName="天津市"/>
<Province iAreaID ="4" cAreaName="重庆市"/>
<Province iAreaID ="5" cAreaName="湖北省">
<City iAreaID ="51" cAreaName="武汉市"/>
<City iAreaID ="52" cAreaName="黄冈市" />
<City iAreaID ="53" cAreaName="荆州市"/>
<City iAreaID ="54" cAreaName="武穴市" />
<City iAreaID ="55" cAreaName="十堰市"/>
<City iAreaID ="56" cAreaName="黄石市" />
</Province>
<Province iAreaID ="6" cAreaName="河北省">
<City iAreaID ="61" cAreaName="石家庄市"/>
<City iAreaID ="62" cAreaName="唐山市" />
</Province>
<Province iAreaID ="7" cAreaName="山西省">
<City iAreaID ="71" cAreaName="太原市" />
<City iAreaID ="72" cAreaName="大同市" />
</Province>
</Area>
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default6.aspx.cs" Inherits="Default6" %>
<!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:XmlDataSource ID="XmlDataSource1" runat="server" DataFile="~/Area.xml"></asp:XmlDataSource>
<asp:Menu ID="Menu1" runat="server" DataSourceID="XmlDataSource1"
Orientation="Horizontal" StaticDisplayLevels="2"
StaticEnableDefaultPopOutImage="False">
<DataBindings>
<asp:MenuItemBinding DataMember="Area" TextField="cAreaName"
ValueField="cAreaName" />
<asp:MenuItemBinding DataMember="Province" TextField="cAreaName"
ValueField="cAreaName" />
<asp:MenuItemBinding DataMember="City" TextField="cAreaName" ValueField="cAreaName" />
</DataBindings>
</asp:Menu>
</div>
</form>
</body>
</html>
原文：http://www.cnblogs.com/mengluo/p/5999675.html