MVC4 DropDownList (二)

1、添加省份和城市类

//省份

    public class Province

    {

        public int Id { get; set; }

        public string Name { get; set; }

    }

    //城市

    public class City

    {

        public int Id { get; set; }

        public string Name { get;set;}

        public int ProvinceId { get; set; }

    }

2、添加控制器

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

using SupermarketManagement.Models;

namespace SupermarketManagement.Controllers

{

    public class LinkageController : Controller

    {

        List<Province> provinceList = new List<Province>();

        List<City> cityList = new List<City>();

        //初始化城市数据

        private void InitProvince()

        {

            provinceList.Add(new Province { Id = , Name = "河北省" });

            provinceList.Add(new Province { Id = , Name = "河南省" });

            provinceList.Add(new Province { Id = , Name = "广东省" });

            cityList.Add(new City { Id = , Name = "石家庄", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "邢台", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "保定", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "郑州", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "安阳", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "洛阳", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "广州", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "中山", ProvinceId =  });

            cityList.Add(new City { Id = , Name = "佛山", ProvinceId =  });

        }

        //绑定省份

        public ActionResult Index()

        {

            InitProvince();

            var pEnumrable = provinceList.Select(p => new SelectListItem { Value = p.Id.ToString(), Text = p.Name });

            ViewBag.Province = pEnumrable;

            return View();

        }

        //获取城市

        public ActionResult ShowCity(int provinceId)

        {

            InitProvince();

            List<City> cList = new List<City>();

            cList = cityList.Where(c => c.ProvinceId == provinceId).ToList();

            return Json(cList, JsonRequestBehavior.AllowGet);

        }

    }

}

3、添加HTML

<!DOCTYPE html>

<html>

<head>

    <meta name="viewport" content="width=device-width" />

    <title>Index</title>

    <script src="~/Content/jquery-1.8.3.min.js"></script>

    <script>

        $(function () {

            $("#Province").bind("change", function () {

                var selectProvince = $(this).val();

                //除了第一个都删除

                  $("#City option:not(:first)").remove();

                $.getJSON("@Url.Action("ShowCity","Linkage")", { provinceId: selectProvince }, function (data) {

                    $.each(data, function (i, item) {

                        $("#City").append("<option value='"+item.Id+"'>"+item.Name+"</option>");

                    });

                });

            });

        });

    </script>

</head>

<body>

    省份：@Html.DropDownList("Province", "请选择省份")<br />

    城市：<select id="City">

        <option value="">请选择城市</option>

    </select><br />

</body>

</html>

巴特西

MVC4 DropDownList (二) — 省市联动

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