网上很多的js实现的省市联动,都只是实现了注册时的选择功能,但对于存储进数据库后的省市信息,可能会应用于修改页面,在修改时,需要首先从数据库中读出对应的省份和城市,然后在下拉列表中将其选中,本文主要实现了这方面的需求；
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ProvinceCity.js文件
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// JScript 文件
var where = new Array(32);
function comefrom(loca,locacity) { this.loca = loca; this.locacity = locacity; }
where[0]= new comefrom(“选择省份”,”选择城市”);
where[1] = new comefrom(“北京”,”东城|西城|崇文|宣武|朝阳|丰台|石景山|海淀|门头沟|房山|通州|顺义|昌平|大兴|平谷|怀柔|密云|延庆”);
where[2] = new comefrom(“上海”,”黄浦|卢湾|徐汇|长宁|静安|普陀|闸北|虹口|杨浦|闵行|宝山|嘉定|浦东|金山|松江|青浦|南汇|奉贤|崇明”);
where[3] = new comefrom(“天津”,”和平|东丽|河东|西青|河西|津南|南开|北辰|河北|武清|红挢|塘沽|汉沽|大港|宁河|静海|宝坻|蓟县”);
where[4] = new comefrom(“重庆”,”万州|涪陵|渝中|大渡口|江北|沙坪坝|九龙坡|南岸|北碚|万盛|双挢|渝北|巴南|黔江|长寿|綦江|潼南|铜梁|大足|荣昌|壁山|梁平|城口|丰都|垫江|武隆|忠县|开县|云阳|奉节|巫山|巫溪|石柱|秀山|酉阳|彭水|江津|合川|永川|南川”);
where[5] = new comefrom(“河北”,”石家庄|邯郸|邢台|保定|张家口|承德|廊坊|唐山|秦皇岛|沧州|衡水”);
where[6] = new comefrom(“山西”,”太原|大同|阳泉|长治|晋城|朔州|吕梁|忻州|晋中|临汾|运城”);
where[7] = new comefrom(“内蒙古”,”呼和浩特|包头|乌海|赤峰|呼伦贝尔盟|阿拉善盟|哲里木盟|兴安盟|乌兰察布盟|锡林郭勒盟|巴彦淖尔盟|伊克昭盟”);
where[8] = new comefrom(“辽宁”,”沈阳|大连|鞍山|抚顺|本溪|丹东|锦州|营口|阜新|辽阳|盘锦|铁岭|朝阳|葫芦岛”);
where[9] = new comefrom(“吉林”,”长春|吉林|四平|辽源|通化|白山|松原|白城|延边”);
where[10] = new comefrom(“黑龙江”,”哈尔滨|齐齐哈尔|牡丹江|佳木斯|大庆|绥化|鹤岗|鸡西|黑河|双鸭山|伊春|七台河|大兴安岭”);
where[11] = new comefrom(“江苏”,”南京|镇江|苏州|南通|扬州|盐城|徐州|连云港|常州|无锡|宿迁|泰州|淮安”);
where[12] = new comefrom(“浙江”,”杭州|宁波|温州|嘉兴|湖州|绍兴|金华|衢州|舟山|台州|丽水”);
where[13] = new comefrom(“安徽”,”合肥|芜湖|蚌埠|马鞍山|淮北|铜陵|安庆|黄山|滁州|宿州|池州|淮南|巢湖|阜阳|六安|宣城|亳州”);
where[14] = new comefrom(“福建”,”福州|厦门|莆田|三明|泉州|漳州|南平|龙岩|宁德”);
where[15] = new comefrom(“江西”,”南昌市|景德镇|九江|鹰潭|萍乡|新馀|赣州|吉安|宜春|抚州|上饶”);
where[16] = new comefrom(“山东”,”济南|青岛|淄博|枣庄|东营|烟台|潍坊|济宁|泰安|威海|日照|莱芜|临沂|德州|聊城|滨州|菏泽”);
where[17] = new comefrom(“河南”,”郑州|开封|洛阳|平顶山|安阳|鹤壁|新乡|焦作|濮阳|许昌|漯河|三门峡|南阳|商丘|信阳|周口|驻马店|济源”);
where[18] = new comefrom(“湖北”,”武汉|宜昌|荆州|襄樊|黄石|荆门|黄冈|十堰|恩施|潜江|天门|仙桃|随州|咸宁|孝感|鄂州”);
where[19] = new comefrom(“湖南”,”长沙|常德|株洲|湘潭|衡阳|岳阳|邵阳|益阳|娄底|怀化|郴州|永州|湘西|张家界”);
where[20] = new comefrom(“广东”,”广州|深圳|珠海|汕头|东莞|中山|佛山|韶关|江门|湛江|茂名|肇庆|惠州|梅州|汕尾|河源|阳江|清远|潮州|揭阳|云浮”);
where[21] = new comefrom(“广西”,”南宁|柳州|桂林|梧州|北海|防城港|钦州|贵港|玉林|南宁地区|柳州地区|贺州|百色|河池”);
where[22] = new comefrom(“海南”,”海口|三亚”);
where[23] = new comefrom(“四川”,”成都|绵阳|德阳|自贡|攀枝花|广元|内江|乐山|南充|宜宾|广安|达川|雅安|眉山|甘孜|凉山|泸州”);
where[24] = new comefrom(“贵州”,”贵阳|六盘水|遵义|安顺|铜仁|黔西南|毕节|黔东南|黔南”);
where[25] = new comefrom(“云南”,”昆明|大理|曲靖|玉溪|昭通|楚雄|红河|文山|思茅|西双版纳|保山|德宏|丽江|怒江|迪庆|临沧”);
where[26] = new comefrom(“西藏”,”拉萨|日喀则|山南|林芝|昌都|阿里|那曲”);
where[27] = new comefrom(“陕西”,”西安|宝鸡|咸阳|铜川|渭南|延安|榆林|汉中|安康|商洛”);
where[28] = new comefrom(“甘肃”,”兰州|嘉峪关|金昌|白银|天水|酒泉|张掖|武威|定西|陇南|平凉|庆阳|临夏|甘南”);
where[29] = new comefrom(“宁夏”,”银川|石嘴山|吴忠|固原”);
where[30] = new comefrom(“青海”,”西宁|海东|海南|海北|黄南|玉树|果洛|海西”);
where[31] = new comefrom(“新疆”,”乌鲁木齐|石河子|克拉玛依|伊犁|巴音郭勒|昌吉|克孜勒苏柯尔克孜|博尔塔拉|吐鲁番|哈密|喀什|和田|阿克苏”);
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function select()//onchange函数，调用选中省份的城市
{
with(document.form1.province)
{
var loca2 = options[selectedIndex].value;
}
for(i = 0;i < where.length;i ++)
{
if (where[i].loca == loca2)
{
loca3 = (where[i].locacity).split(“|”);
for(j = 0;j < loca3.length;j++)
{
with(document.form1.city)
{
length = loca3.length;
options[j].text = loca3[j];
options[j].value = loca3[j];
//var loca4=options[selectedIndex].value;
}
}
break;
}
}
}
function init(sheng,shi) {
var sheng=arguments[0];
var shi=arguments[1];
with(document.form1.province)
{
length = where.length;
if(sheng==”")//没有要加载的城市
{
loca3 = (where[0].locacity).split(“|”); //没有要加载的城市，选择默认第一项
for(k=0;k<where.length;k++)
{
options[k].text = where[k].loca;
options[k].value = where[k].loca;
}
options[0].selected = true;
}
else
{
for(k=0;k<where.length;k++)
{
if(where[k].loca==sheng)//判断要选中的省份
{
options[k].selected = true;
loca3 = (where[k].locacity).split(“|”); //选中哪个省份，然后加载相应的城市分类
}
options[k].text = where[k].loca;
options[k].value = where[k].loca;
}
}
}
with(document.form1.city)
{
length = loca3.length;
for(l=0;l<length;l++)
{
if(loca3[l]==shi)//判断要选中的城市
{
options[l].selected = true;
}
options[l].text = loca3[l];
options[l].value = loca3[l];
}
//options[selectedIndex].text = loca3[0]; options[selectedIndex].value = loca3[0];
}
}
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注册信息时:
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<%@ Page Language=”C#” AutoEventWireup=”true” CodeFile=”test.aspx.cs” Inherits=”test” %>
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<!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>
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<html xmlns=”http://www.w3.org/1999/xhtml” >
<head runat=”server”>
<title>无标题页</title>
<script language=”javascript” src=”ProvinceCity.js”></script>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<select id=”province” size=”1″ name=”province” runat=”server” onchange=”select();” style=”width:100px”>
<option selected></option>
</select>
<select id=”city” size=”1″ name=”city” runat=”server” style=”width:100px”>
<option selected></option>
</select>
<script language=”javascript”>
init(”,”);
</script>
</div>
</form>
</body>
</html>
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修改信息时:
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把上面的init(”,”);替换成 init(‘<%=pro %>’,\'<%=city2 %>’);
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对应的.cs文件中
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protected string pro;
protected string city2;
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protected void Page_Load(object sender, EventArgs e)
{
pro = “xxxxx”;//数据库中读取出的省份数据；
city2 = “yyyyy”;//数据库中读取出的城市数据；
}
Over!
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来源：http://blog.csdn.net/ChaoYang0502
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