AngularJS怎么实现多级下拉框

本篇内容主要讲解“angularjs怎么实现多级下拉框”，感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷，实用性强。下面就让小编来带大家学习“AngularJS怎么实现多级下拉框”吧!

具体代码如下

<div ng-app="MultiDropDownApp" ng-controller="MultiDropDownControl as vm">    <label>选择地址:</label>    <!--ng-options加载所有选择项，ng-model记录当前选择项-->    <select ng-model="vm.province" ng-options="x.name for x in vm.provinceSort"            ng-change="vm.selectProvince()" id="" value="" class="fORM-control width-25">        <option value="">请选择</option>    </select>    <label>—</label>    <select ng-model="vm.city" ng-options="x.name for x in vm.citySort"            id="" value="" class="form-control width-25">        <option value="">请选择</option>    </select></div>

<script src="~/Scripts/angular.min.js"></script><script>    var app = angular.module('MultiDropDownApp', []);    //可以添加上自己注入的服务    app.controller('MultiDropDownControl', ['$scope', '$Http',        function ($scope, $http) {            var vm = this;            vm.provinceSort = [];            vm.citySort = [];            //选择省级单位，初始化市级数据   二级联动            vm.selectProvince = function () {                var fatherID = vm.province.id;                vm.citySort = [];                $http({                    method: 'POST',                    url: '/AngularjsStudy/GetChildrenSort',                    data: { fatherID: fatherID }                }).then(function successCallback(data) {                    vm.citySort = data.data;                }, function errorCallback(response) {                    // 请求失败执行代码                });            }            //初始化页面            function init() {                //省                $http({                    method: 'POST',                    url: '/AngularjsStudy/GetProvinceSort',                    data: {}                }).then(function successCallback(data) {                    //加载下拉框数据                    vm.provinceSort = data.data;                    //设置默认选项                    vm.province = vm.provinceSort[0];                }, function errorCallback(response) {                    // 请求失败执行代码                });            }            //初始化            init();        }])</script>

Controller

public ActionResult GetProvinceSort()        {            List<District> districts = new List<District>();            districts.Add(new District() {id=1,fatherID=0,name="湖南省" });            districts.Add(new District() { id =2, fatherID = 0, name = "湖北省" });            districts.Add(new District() { id =3, fatherID = 0, name = "四川省" });            return JSON(districts);        }        public ActionResult GetChildrenSort(int fatherID)        {            List<District> districts = new List<District>();            switch (fatherID)            {                case 1:                    districts.Add(new District() { id = 4, fatherID = 1, name = "长沙市" });                    districts.Add(new District() { id = 5, fatherID = 1, name = "岳阳市" });                    districts.Add(new District() { id = 6, fatherID = 1, name = "株洲市" });                    return Json(districts);                case 2:                    districts.Add(new District() { id = 7, fatherID = 2, name = "武汉市" });                    districts.Add(new District() { id = 8, fatherID = 2, name = "宜昌市" });                    return Json(districts);                case 3:                    districts.Add(new District() { id = 9, fatherID = 3, name = "成都市" });                    districts.Add(new District() { id = 10, fatherID = 3, name = "遂宁市" });                    districts.Add(new District() { id = 11, fatherID = 3, name = "巴中市" });                    districts.Add(new District() { id = 12, fatherID = 3, name = "绵阳市" });                    districts.Add(new District() { id = 13, fatherID = 3, name = "南充市" });                    return Json(districts);                default:                    districts.Add(new District() { id = 14, fatherID = -1, name = "不知道你选了什么∑q|ﾟДﾟ|p" });                    return Json(districts);            }        }

Model

public class District{    public int id { get; set; }    /// <summary>    /// 根节点FatherID=0    /// </summary>    public int fatherID { get; set; }    public string name { get; set; }}

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