public class Employees { [Key] public int EmployeeId { get; set; } [Required, Display(Name = "雇员名字")] public string EmployeeName { get; set; } [Required, Display(Name = "地址")] public String Address { get; set; } [Required, Display(Name = "所属省")] public int Province { get; set; } [Required, Display(Name = "所在城市")] public int City { get; set; } [Display(Name = "地区代码")] public String ZipCode { get; set; } [Required, Display(Name = "联系号码")] public String Phone { get; set; } }
（2）初始化数据
List<Province> provinceList = new List<Province>() { new Province(){provinceId=1,provinceName="湖南",Abbr="hunan_province"}, new Province(){provinceId=2,provinceName="广东",Abbr="guangdong_province"}, new Province(){provinceId=3,provinceName="吉林",Abbr="jilin_province"}, new Province(){provinceId=4,provinceName="黑龙江",Abbr="heilongjiang_province"} };
以及绑定ViewBag到下拉框和控制器上的方法：
[HttpGet] public ActionResult Create() { ViewBag.ProvinceList = provinceList; var model = new Employees(); return View(model); } [HttpPost] public ActionResult Create(Employees model) { if (ModelState.IsValid) { } ViewBag.ProvinceList = provinceList; return View(model); } public ActionResult FillCity(int provinceId) { var cities = new List<City>() { new City(){CityId=10,CityName="岳阳市",provinceId=1}, new City(){CityId=10,CityName="深圳市",provinceId=2}, new City(){CityId=10,CityName="吉林市",provinceId=3}, new City(){CityId=10,CityName="哈尔滨市",provinceId=4} }; cities = cities.Where(s => s.provinceId == provinceId).ToList(); return Json(cities, JsonRequestBehavior.AllowGet); }
（3）视图展示
@using (Html.BeginForm()) { @Html.AntiForgeryToken() <div> <h4>注册雇员</h4> <div> @Html.LabelFor(m => m.EmployeeName, new { @class = "control-label col-md-2" }) <div> @Html.TextBoxFor(m => m.EmployeeName, new { @class = "form-control" }) @Html.ValidationMessageFor(m => m.EmployeeName, "", new { @class = "text-danger" }) </div> </div> <div> @Html.LabelFor(m => m.Address, new { @class = "control-label col-md-2" }) <div> @Html.TextBoxFor(m => m.Address, new { @class = "form-control" }) @Html.ValidationMessageFor(m => m.Address, "", new { @class = "text-danger" }) </div> </div> <div> @Html.LabelFor(m => m.Province, new { @class = "control-label col-md-2" }) <div> @Html.DropDownListFor(m => m.Province, new SelectList(ViewBag.ProvinceList, "provinceId", "provinceName"), "选择所在省", new { @class = "form-control", @onchange = "FillCity()" }) @Html.ValidationMessageFor(m => m.Province, "", new { @class = "text-danger" }) </div> </div> <div> @Html.LabelFor(m => m.City, new { @class = "control-label col-md-2" }) <div> @Html.DropDownListFor(m => m.City, new SelectList(Enumerable.Empty<SelectListItem>(), "CityId", "CityName"), "选择所在市", new { @class = "form-control" }) @Html.ValidationMessageFor(m => m.City, "", new { @class = "text-danger" }) </div> </div> <div> @Html.LabelFor(m => m.ZipCode, htmlAttributes: new { @class = "control-label col-md-2" }) <div> @Html.TextBoxFor(m => m.ZipCode, new { @class = "form-control" }) @Html.ValidationMessageFor(m => m.ZipCode, "", new { @class = "text-danger" }) </div> </div> <div> @Html.LabelFor(m => m.Phone, new { @class = "control-label col-md-2" }) <div> @Html.TextBoxFor(m => m.Phone, new { @class = "form-control" }) @Html.ValidationMessageFor(m => m.Phone, "", new { @class = "text-danger" }) </div> </div> <div> <div> <input type="submit" value="Create" /> <a href="https://www.jb51.net/Home/Employees">Cancel</a> </div> </div> </div> }
（4）根据省下拉框选择到市下拉框脚本
function FillCity() { var provinceId = $('#Province').val(); $.ajax({ url: '/Home/FillCity', type: "GET", dataType: "JSON", data: { provinceId: provinceId }, success: function (cities) { $("#City").html(""); $.each(cities, function (i, city) { $("#City").append( $('<option></option>').val(city.CityId).html(city.CityName)); }); } }); }
我们来看看整个过程：
