<!doctype html>
<html>
<head>
<title></title>
<meta charset = "utf-8"/>
</head>
<style>
</style>
<body>
<select id="one">
<option value="">请选择省份</option>
</select>
<select id="two">
<option value="">请选择城市</option>
</select>
<select id="three">
<option value="">请选择区域</option>
</select>
<script type="text/javascript" src="js/jquery-1.12.0.js"></script>
<script type="text/javascript">
/*
1.搭建框架
2.给省份和城市绑定change事件
*/
$(function(){
var province = [
{"name" : "广东省" ,
"city" : [
{
"name" : "广州市" ,
"area" : ["越秀区","荔湾区","海珠区","天河区,白云区"]
},
{
"name" : "深圳市" ,
"area" : ["福田区","罗湖区","南山区","宝安区","龙岗区"]
}
]
},
{"name" : "浙江省" ,
"city" : [
{
"name" : "杭州市" ,
"area" : ["上城区","下城区","江干区","西湖区"]
},
{
"name" : "丽水" ,
"area" : ["莲都区","松阳县","遂昌县","云和县"]
}
]
},
{"name" : "江西省" ,
"city" : [
{
"name" : "南昌市" ,
"area" : ["东湖区","西湖区","青云谱区","湾里区"]
},
{
"name" : "九江市" ,
"area" : ["浔阳区","庐山区","瑞昌市","九江县"]
},
{
"name" : "赣州市" ,
"area" : ["章贡区","南康区","上犹县","赣县"]
}
]
},
]
// 二级联动
$("#two").change(function(){
var one_index = $("#one option:selected").index()
var two_index = $("#two option:selected").index()
var three = $("#three")
three.empty().append("<option>请选择区域</option>")
if(two_index > 0){
var area = province[one_index-1].city[two_index-1].area
for(var i = 0 i < area.length i++){
three.append("<option>"+area[i]+"</option>")
}
}
})
// 一级联动
$("#one").change(function(){
var one_index = $("#one option:selected").index()
var two = $("#two")
console.log(one_index)
two.empty().append("<option>请选择城市</option>")
$("#three").empty().append("<option>请选择区域</option>")//清除
if(one_index > 0){
var city = province[one_index-1].city
console.log(province[one_index-1].city)
for(var i = 0 i < city.length i++){
two.append("<option>"+city[i].name+"</option>")
}
}
})
init()
function init(){
for(var i = 0 i < province.length i++){
$("#one").append("<option>"+province[i].name+"</option>")
}
}
})
</script>
</body>
</html>
“bootstrap-select.js ”联动改变方式如下：
1、多选效果
可以设置最多只能选几个
2、图文结合的效果
3、远程搜索功能（即在用户输入搜索内容时动态去后台取数据）
输入内容前
输入空格搜索出全部
滚动条滑动到底部自动加载剩余项
输入文本动态去后台过滤
更高级的用法如：
代码示例如下：
1、多选效果
select2的多选很简单，设置一个属性就好了。
<script src="~/Scripts/jquery-1.10.2.js"></script><script src="~/Content/bootstrap/js/bootstrap.js"></script>
<link href="~/Content/bootstrap/css/bootstrap.css" rel="stylesheet" />
<script src="~/Content/select2-master/dist/js/select2.js"></script>
<link href="~/Content/select2-master/dist/css/select2.css" rel="stylesheet" /> <select id="sel_menu2" multiple="multiple" class="form-control">
<optgroup label="系统设置">
<option value="1">用户管理</option>
<option value="2">角色管理</option>
<option value="3">部门管理</option>
<option value="4">菜单管理</option>
</optgroup>
<optgroup label="订单管理">
<option value="5">订单查询</option>
<option value="6">订单导入</option>
<option value="7">订单删除</option>
<option value="8">订单撤销</option>
</optgroup>
<optgroup label="基础数据">
<option value="9">基础数据维护</option>
</optgroup>
</select> //多选
$("#sel_menu2").select2({
tags: true,
maximumSelectionLength: 3 //最多能够选择的个数 })
2、图文结合的效果
<select id="sel_menu" class="js-example-templating js-states form-control"><optgroup label="系统设置">
<option value="1">用户管理</option>
<option value="2">角色管理</option>
<option value="3">部门管理</option>
<option value="4">菜单管理</option>
</optgroup>
<optgroup label="订单管理">
<option value="5">订单查询</option>
<option value="6">订单导入</option>
<option value="7">订单删除</option>
<option value="8">订单撤销</option>
</optgroup>
<optgroup label="基础数据">
<option value="9">基础数据维护</option>
</optgroup>
</select> $(function () {
//带图片
$("#sel_menu").select2({
templateResult: formatState,
templateSelection: formatState
})
})
function formatState(state) {
if (!state.id) { return state.text }
var $state = $(
'<span><img src="/content/images/' + state.element.value.toLowerCase() + '.ico" class="img-flag" /> ' + state.text + '</span>'
)
return $state}
3、远程搜索功能（即在用户输入搜索内容时动态去后台取数据）
<select id="sel_menu3" class="js-data-example-ajax form-control"><option value="3620194" selected="selected">请选择</option>
</select> $(function () { //远程筛选
$("#sel_menu3").select2({
ajax: {
url: "/Home/GetProvinces",
dataType: 'json',
delay: 250,
data: function (params) {
return {
q: params.term, // search term page: params.page
}
},
processResults: function (data, params) {
params.page = params.page || 1
return {
results: data.items,
pagination: {
more: (params.page * 10) < data.total_count
}
}
},
cache: true
},
escapeMarkup: function (markup) { return markup }, // let our custom formatter work
minimumInputLength: 1,
templateResult: formatRepoProvince, // omitted for brevity, see the source of this page
templateSelection: formatRepoProvince // omitted for brevity, see the source of this page })
}) function formatRepoProvince(repo) {
if (repo.loading) return repo.text
var markup = "<div>"+repo.name+"</div>"
return markup
}
这里有要注意的一个地方就是processResults属性对应的方法有一个more属性用于是否分页显示的，这里的值要和你需要一次显示的值的条数匹配。
后台对应的方法如下：
public List<string> lstProvince = new List<string>() {"北京市","天津市","重庆市","上海市","河北省","山西省","辽宁省","吉林省","黑龙江省","江苏省","浙江省","安徽省","福建省","江西省","山东省","河南省","湖北省","湖南省","广东省","海南省","四川省","贵州省","云南省","陕西省","甘肃省","青海省","台湾省","内蒙古自治区","广西壮族自治区","西藏自治区","宁夏回族自治区","新疆维吾尔自治区","香港特别行政区","澳门特别行政区" }public JsonResult GetProvinces(string q, string page)
{
var lstRes = new List<Province>()
for (var i = 0 i < 30 i++)
{
var oProvince = new Province()
oProvince.id = i
oProvince.name = lstProvince[i]
lstRes.Add(oProvince)
}
if (!string.IsNullOrEmpty(q.Trim()))
{
lstRes = lstRes.Where(x => x.name.Contains(q)).ToList() }
var lstCurPageRes = string.IsNullOrEmpty(page) ? lstRes.Take(10) : lstRes.Skip(Convert.ToInt32(page) * 10 - 10).Take(10)
return Json(new { items = lstCurPageRes, total_count = lstRes.Count }, JsonRequestBehavior.AllowGet) }
