中国省份城市级联选择--asp.net

      上次写了使用JavaScript实现中国省份级联选择，但是有朋友不愿意写JavaScript，所以今天写了一个使用。net来实现的例子，当然省份和城市还是使用我的 生活百科 里面的中国省份城市列表 里面的数据。这样喜欢写c#的朋友可以试试。

      最早的时候实现是把数据存入数据库，通过省份查询对应的城市，但是数据库代码写着太多，性能也不是很好，所以，最后使用xml文件来存放数据。

Province.xml 文件代码

 <?xml version="1.0" encoding="utf-8"?><Provinces><Province Code="999" Name="省份"><City Code="99999" Name="城市"></City></Province><Province Code="110000" Name="北京市"><City Code="110100" Name="北京"></City></Province><Province Code="120000" Name="上海市"><City Code="120100" Name="上海"></City></Province><Province Code="130000" Name="天津市"><City Code="130100" Name="天津"></City></Province><Province Code="140000" Name="重庆市"><City Code="140100" Name="重庆"></City></Province><Province Code="150000" Name="河北省"><City Code="150101" Name="石家庄"></City><City Code="150201" Name="唐山"></City><City Code="150301" Name="秦皇岛"></City><City Code="150401" Name="邯郸"></City><City Code="150501" Name="邢台"></City><City Code="150601" Name="保定"></City><City Code="150701" Name="张家口"></City><City Code="150801" Name="承德"></City><City Code="150901" Name="沧州"></City><City Code="151001" Name="廊坊"></City><City Code="153001" Name="衡水"></City></Province><Province Code="160000" Name="山西省"><City Code="160101" Name="太原"></City><City Code="160201" Name="大同"></City><City Code="160301" Name="阳泉"></City><City Code="160401" Name="长治"></City><City Code="160501" Name="晋城"></City><City Code="160601" Name="朔州"></City><City Code="160701" Name="运城"></City><City Code="160801" Name="忻州"></City><City Code="160701" Name="临汾"></City><City Code="161101" Name="吕梁"></City></Province><Province Code="170000" Name="内蒙古自治区"><City Code="170101" Name="呼和浩特"></City><City Code="170201" Name="包头"></City><City Code="170301" Name="乌海"></City><City Code="170401" Name="赤峰"></City><City Code="172101" Name="通辽"></City><City Code="172201" Name="鄂尔多斯"></City><City Code="172301" Name="呼伦贝尔"></City><City Code="172502" Name="巴彦淖尔"></City><City Code="172601" Name="乌兰察布"></City><City Code="172701" Name="兴安"></City><City Code="172801" Name="锡林郭勒"></City><City Code="172921" Name="阿拉善"></City></Province><Province Code="210000" Name="辽宁省"><City Code="210101" Name="沈阳"></City><City Code="210201" Name="大连"></City><City Code="210301" Name="鞍山"></City><City Code="210401" Name="抚顺"></City><City Code="210501" Name="本溪"></City><City Code="210601" Name="丹东"></City><City Code="210701" Name="锦州"></City><City Code="210801" Name="营口"></City><City Code="210901" Name="阜新"></City><City Code="211001" Name="辽阳"></City><City Code="211101" Name="盘锦"></City><City Code="211201" Name="铁岭"></City><City Code="211301" Name="朝阳"></City><City Code="211401" Name="葫芦岛"></City></Province><Province Code="220000" Name="吉林省"><City Code="220101" Name="长春"></City><City Code="220201" Name="吉林"></City><City Code="220301" Name="四平"></City><City Code="220401" Name="辽源"></City><City Code="220501" Name="通化"></City><City Code="220601" Name="白山"></City><City Code="222301" Name="松原"></City><City Code="222401" Name="白城"></City><City Code="222501" Name="延边"></City></Province><Province Code="230000" Name="黑龙江省"><City Code="230101" Name="哈尔滨"></City><City Code="230201" Name="齐齐哈尔"></City><City Code="230301" Name="鸡西"></City><City Code="230401" Name="鹤岗"></City><City Code="230501" Name="双鸭山"></City><City Code="230601" Name="大庆"></City><City Code="230701" Name="伊春"></City><City Code="230801" Name="佳木斯"></City><City Code="230901" Name="七台河"></City><City Code="231001" Name="牡丹江"></City><City Code="232301" Name="黑河"></City><City Code="232601" Name="绥化"></City><City Code="232700" Name="大兴安岭"></City></Province><Province Code="320000" Name="江苏省"><City Code="320101" Name="南京"></City><City Code="320201" Name="无锡"></City><City Code="320301" Name="徐州"></City><City Code="320401" Name="常州"></City><City Code="320501" Name="苏州"></City><City Code="320600" Name="南通"></City><City Code="320701" Name="连云港"></City><City Code="320801" Name="淮安"></City><City Code="320901" Name="盐城"></City><City Code="321001" Name="扬州"></City><City Code="321101" Name="镇江"></City><City Code="321201" Name="泰州"></City><City Code="321301" Name="宿迁"></City></Province><Province Code="330000" Name="浙江省"><City Code="330101" Name="杭州"></City><City Code="330201" Name="宁波"></City><City Code="330301" Name="温州"></City><City Code="330401" Name="嘉兴"></City><City Code="330501" Name="湖州"></City><City Code="330601" Name="绍兴"></City><City Code="330701" Name="金华"></City><City Code="330801" Name="衢州"></City><City Code="330901" Name="舟山"></City><City Code="332501" Name="台州"></City><City Code="332602" Name="丽水"></City></Province><Province Code="340000" Name="安徽省"><City Code="340101" Name="合肥"></City><City Code="340201" Name="芜湖"></City><City Code="340301" Name="蚌埠"></City><City Code="340401" Name="淮南"></City><City Code="340501" Name="马鞍山"></City><City Code="340601" Name="淮北"></City><City Code="340701" Name="铜陵"></City><City Code="340801" Name="安庆"></City><City Code="341001" Name="黄山"></City><City Code="342101" Name="滁州"></City><City Code="342201" Name="阜阳"></City><City Code="342301" Name="宿州"></City><City Code="342401" Name="巢湖"></City><City Code="342501" Name="六安"></City><City Code="342601" Name="亳州"></City><City Code="342701" Name="池州"></City><City Code="342901" Name="宣城"></City></Province><Province Code="350000" Name="福建省"><City Code="350101" Name="福州"></City><City Code="350201" Name="厦门"></City><City Code="350301" Name="莆田"></City><City Code="350401" Name="三明"></City><City Code="350501" Name="泉州"></City><City Code="350601" Name="漳州"></City><City Code="352101" Name="南平"></City><City Code="352201" Name="龙岩"></City><City Code="352601" Name="宁德"></City></Province><Province Code="360000" Name="江西省"><City Code="360101" Name="南昌"></City><City Code="360201" Name="景德镇"></City><City Code="360301" Name="萍乡"></City><City Code="360401" Name="九江"></City><City Code="360501" Name="新余"></City><City Code="360601" Name="鹰潭"></City><City Code="362101" Name="赣州"></City><City Code="362201" Name="吉安"></City><City Code="362301" Name="宜春"></City><City Code="362401" Name="抚州"></City><City Code="362502" Name="上饶"></City></Province><Province Code="370000" Name="山东省"><City Code="370101" Name="济南"></City><City Code="370201" Name="青岛"></City><City Code="370301" Name="淄博"></City><City Code="370401" Name="枣庄"></City><City Code="370501" Name="东营"></City><City Code="370601" Name="烟台"></City><City Code="370701" Name="潍坊"></City><City Code="370801" Name="威海"></City><City Code="370901" Name="济宁"></City><City Code="371001" Name="泰安"></City><City Code="371100" Name="日照"></City><City Code="372301" Name="莱芜"></City><City Code="372401" Name="临沂"></City><City Code="372501" Name="德州"></City><City Code="372601" Name="聊城"></City><City Code="372801" Name="滨州"></City><City Code="372901" Name="菏泽"></City></Province><Province Code="410000" Name="河南省"><City Code="410101" Name="郑州"></City><City Code="410201" Name="开封"></City><City Code="410301" Name="洛阳"></City><City Code="410401" Name="平顶山"></City><City Code="410501" Name="焦作"></City><City Code="410601" Name="鹤壁"></City><City Code="410701" Name="新乡"></City><City Code="410801" Name="安阳"></City><City Code="410901" Name="濮阳"></City><City Code="411001" Name="许昌"></City><City Code="411101" Name="漯河"></City><City Code="411201" Name="三门峡"></City><City Code="412301" Name="南阳"></City><City Code="412701" Name="商丘"></City><City Code="412801" Name="信阳"></City><City Code="412901" Name="周口"></City><City Code="413001" Name="驻马店"></City></Province><Province Code="420000" Name="湖北省"><City Code="420101" Name="武汉"></City><City Code="420201" Name="黄石"></City><City Code="420301" Name="襄樊"></City><City Code="420400" Name="十堰"></City><City Code="420501" Name="荆州"></City><City Code="420601" Name="宜昌"></City><City Code="420701" Name="荆门"></City><City Code="420801" Name="鄂州"></City><City Code="422103" Name="孝感"></City><City Code="422201" Name="黄冈 "></City><City Code="422301" Name="咸宁"></City><City Code="422421" Name="随州"></City><City Code="422801" Name="恩施"></City></Province><Province Code="430000" Name="湖南省"><City Code="430101" Name="长沙"></City><City Code="430201" Name="株洲"></City><City Code="430301" Name="湘潭"></City><City Code="430401" Name="衡阳"></City><City Code="430501" Name="邵阳"></City><City Code="430601" Name="岳阳"></City><City Code="430701" Name="常德"></City><City Code="430801" Name="张家界"></City><City Code="432301" Name="益阳"></City><City Code="432501" Name="郴州"></City><City Code="432801" Name="永州"></City><City Code="432901" Name="怀化"></City><City Code="433001" Name="娄底"></City><City Code="433101" Name="湘西"></City></Province><Province Code="440000" Name="广东省"><City Code="440101" Name="广州"></City><City Code="440201" Name="深圳"></City><City Code="440301" Name="珠海"></City><City Code="440401" Name="汕头"></City><City Code="440501" Name="韶关"></City><City Code="440601" Name="佛山"></City><City Code="440701" Name="江门"></City><City Code="440801" Name="湛江"></City><City Code="440901" Name="茂名"></City><City Code="441201" Name="肇庆"></City><City Code="441301" Name="惠州"></City><City Code="441401" Name="梅州"></City><City Code="441501" Name="汕尾"></City><City Code="441601" Name="河源"></City><City Code="441701" Name="阳江"></City><City Code="441801" Name="清远"></City><City Code="441901" Name="东莞"></City><City Code="442001" Name="中山"></City><City Code="442101" Name="潮州"></City><City Code="442201" Name="揭阳"></City><City Code="442301" Name="云浮"></City></Province><Province Code="450000" Name="广西壮族自治区"><City Code="450101" Name="南宁"></City><City Code="450201" Name="柳州"></City><City Code="450301" Name="桂林"></City><City Code="450401" Name="梧州"></City><City Code="450501" Name="北海"></City><City Code="452501" Name="防城港"></City><City Code="452601" Name="钦州"></City><City Code="452701" Name="贵港"></City><City Code="452801" Name="玉林"></City><City Code="452901" Name="百色"></City><City Code="453101" Name="贺州"></City><City Code="453201" Name="河池"></City><City Code="453301" Name="来宾"></City><City Code="453401" Name="崇左"></City></Province><Province Code="460000" Name="海南省"><City Code="460100" Name="海口"></City><City Code="460200" Name="三亚"></City></Province><Province Code="510000" Name="四川省"><City Code="510101" Name="成都"></City><City Code="510301" Name="自贡"></City><City Code="510401" Name="攀枝花"></City><City Code="510501" Name="泸州"></City><City Code="510601" Name="德阳"></City><City Code="510701" Name="绵阳"></City><City Code="510801" Name="广元"></City><City Code="510901" Name="遂宁"></City><City Code="511001" Name="内江"></City><City Code="511101" Name="乐山"></City><City Code="512501" Name="宜宾"></City><City Code="512901" Name="南充"></City><City Code="513001" Name="宜宾"></City><City Code="513101" Name="广安 "></City><City Code="513201" Name="达州"></City><City Code="513301" Name="眉山"></City><City Code="513401" Name="雅安"></City><City Code="513501" Name="巴中"></City><City Code="513601" Name="资阳"></City><City Code="513701" Name="阿坝"></City><City Code="513801" Name="甘孜"></City><City Code="513901" Name="凉山"></City></Province><Province Code="520000" Name="贵州省"><City Code="520101" Name="贵阳"></City><City Code="520200" Name="六盘水"></City><City Code="522101" Name="遵义"></City><City Code="522201" Name="安顺"></City><City Code="522301" Name="铜仁"></City><City Code="522421" Name="毕节"></City><City Code="522501" Name="黔西南"></City><City Code="522601" Name="黔东南"></City><City Code="522701" Name="黔南"></City></Province><Province Code="530000" Name="云南省"><City Code="530101" Name="昆明"></City><City Code="530201" Name="曲靖"></City><City Code="532101" Name="玉溪"></City><City Code="532201" Name="保山"></City><City Code="532301" Name="昭通"></City><City Code="532401" Name="丽江"></City><City Code="532501" Name="普洱"></City><City Code="532621" Name="临沧"></City><City Code="532721" Name="文山"></City><City Code="532821" Name="红河"></City><City Code="532901" Name="西双版纳"></City><City Code="533001" Name="楚雄"></City><City Code="533121" Name="大理"></City><City Code="533221" Name="德宏"></City><City Code="533321" Name="怒江"></City><City Code="533421" Name="迪庆"></City></Province><Province Code="540000" Name="西藏自治区"><City Code="540101" Name="拉萨"></City><City Code="542121" Name="昌都"></City><City Code="542200" Name="山南 "></City><City Code="542221" Name="日喀则"></City><City Code="542301" Name="那曲"></City><City Code="542421" Name="阿里 "></City><City Code="542523" Name="林芝"></City></Province><Province Code="610000" Name="陕西省"><City Code="610101" Name="西安"></City><City Code="610201" Name="铜川"></City><City Code="610301" Name="宝鸡"></City><City Code="610401" Name="咸阳"></City><City Code="612101" Name="渭南"></City><City Code="612301" Name="延安"></City><City Code="612401" Name="汉中"></City><City Code="612501" Name="榆林"></City><City Code="612601" Name="安康"></City><City Code="612701" Name="商洛"></City></Province><Province Code="620000" Name="甘肃省"><City Code="620101" Name="兰州"></City><City Code="620201" Name="嘉峪关"></City><City Code="620301" Name="金昌"></City><City Code="620401" Name="白银"></City><City Code="620501" Name="天水"></City><City Code="620601" Name="武威"></City><City Code="620701" Name="张掖"></City><City Code="620801" Name="平凉"></City><City Code="622102" Name="酒泉"></City><City Code="622421" Name="庆阳"></City><City Code="622624" Name="定西"></City><City Code="622801" Name="陇南"></City><City Code="622901" Name="临夏"></City><City Code="623027" Name="甘南"></City></Province><Province Code="630000" Name="青海省"><City Code="630100" Name="西宁"></City><City Code="632121" Name="海东"></City><City Code="632221" Name="海北"></City><City Code="632321" Name="黄南"></City><City Code="632521" Name="海南"></City><City Code="632621" Name="果洛"></City><City Code="632721" Name="玉树"></City><City Code="632802" Name="海西"></City></Province><Province Code="640000" Name="宁夏回族自治区"><City Code="640101" Name="银川"></City><City Code="640201" Name="石嘴山"></City><City Code="642101" Name="吴忠"></City><City Code="642201" Name="固原"></City><City Code="642301" Name="中卫"></City></Province><Province Code="650000" Name="新疆维吾尔自治区"><City Code="650101" Name="乌鲁木齐"></City><City Code="650201" Name="克拉玛依"></City><City Code="652101" Name="吐鲁番"></City><City Code="652201" Name="哈密"></City><City Code="652301" Name="和田"></City><City Code="652701" Name="阿克苏"></City><City Code="652801" Name="喀什"></City><City Code="652901" Name="克孜勒苏柯尔克孜"></City><City Code="653001" Name="巴音郭楞蒙古"></City><City Code="653101" Name="昌吉"></City><City Code="653201" Name="博尔塔拉蒙古"></City><City Code="654101" Name="伊犁哈萨克"></City><City Code="654201" Name="塔城"></City><City Code="654301" Name="阿勒泰"></City></Province><Province Code="710000" Name="台湾省"><City Code="710001" Name="台北"></City><City Code="710002" Name="高雄"></City><City Code="710008" Name="基隆"></City><City Code="710019" Name="台中"></City><City Code="710020" Name="台南"></City><City Code="710021" Name="新竹"></City><City Code="710022" Name="嘉义"></City></Province><Province Code="810000" Name="香港特别行政区"><City Code="810000" Name="香港特别行政区"></City></Province><Province Code="820000" Name="澳门特别行政区"><City Code="820000" Name="澳门特别行政区"></City></Province></Provinces>

Default.aspx 页面代码如下

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Province_Default" %><!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:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:DropDownList ID="ddlProvince" runat="server" AutoPostBack="True" onselectedindexchanged="ddlProvince_SelectedIndexChanged"></asp:DropDownList>   <asp:DropDownList ID="ddlCity" runat="server"></asp:DropDownList> </ContentTemplate> </asp:UpdatePanel> </div> </form></body></html>

 

Default.aspx.cs 页面代码如下

using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Xml;public partial class Province_Default : System.Web.UI.Page{ public string City = "城市"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { BindProvince(); } } protected void ddlProvince_SelectedIndexChanged(object sender, EventArgs e) { BindCity(); } void BindProvince() { string CurrentPath = this.Server.MapPath("."); if (System.IO.File.Exists(CurrentPath + "//Province.xml")) { this.ddlProvince.Items.Clear(); System.Xml.XmlDocument doc = new System.Xml.XmlDocument(); doc.Load(CurrentPath + "//Province.xml"); XmlNodeList nodes = doc.DocumentElement.ChildNodes; XmlNode nodeCity = doc.DocumentElement.SelectSingleNode(@"Province/City[@Name='" + this.City + "']"); foreach (XmlNode node in nodes) { this.ddlProvince.Items.Add(node.Attributes["Name"].Value); int n = this.ddlProvince.Items.Count - 1; if (nodeCity != null && node == nodeCity.ParentNode) this.ddlProvince.SelectedIndex = n; } BindCity(); } else { } } void BindCity() { string CurrentPath = this.Server.MapPath("."); if (System.IO.File.Exists(CurrentPath + "//Province.xml")) { this.ddlCity.Items.Clear(); System.Xml.XmlDocument doc = new System.Xml.XmlDocument(); doc.Load(CurrentPath + "//Province.xml"); XmlNodeList nodes = doc.DocumentElement.ChildNodes[this.ddlProvince.SelectedIndex].ChildNodes; foreach (XmlNode node in nodes) { this.ddlCity.Items.Add(node.Attributes["Name"].Value); int n = this.ddlCity.Items.Count - 1; if (node.Attributes["Name"].Value == this.City) { this.ddlCity.SelectedIndex = n; } } if (this.ddlCity.SelectedIndex == -1) this.ddlCity.SelectedIndex = 0; } else { } }}

       好了，这样就能实现无刷新实现省份城市级联选择了，不得不说，微软真是牛B啊，实现Ajax效果简直就像是使用作弊器打游戏一样，呵呵，喜欢使用JavaScript来实现ajax的别骂我啊。