asp.net mvc jQuery 城市二級聯動

頁面效果圖:javascript

數據庫表結構:html

首先在數據庫中建立省級、城市的表,個人表以下:我用了一張表放下了省級、城市的數據,用level劃分省份和城市,parentId表示該城市所在省份的idjava

主要文件有:index.cshtml,ErJLDController.cs ,數據處理層,業務處理層,還有數據庫文件 。數據庫

index.cshtml:json

 1 <body>
 2     <div>
 3         <select id="provinceId" >
 4          <option> 請選擇省份</option>
 5         </select>
 6         <select id="cityId">
 7             <option>請選擇市區</option>
 8         </select>
 9     </div>
10 
11     <script type="text/javascript">
12     
13         
14 
15         //用json從數據庫裏取一級列表的參數
16         $(function () {
17 
18             $.getJSON("ErJLD/getProvince/", function (obj) {
19                 $.each(obj, function (i, p) {
20                     $("#provinceId").append("<option value='"+p.id+"'>" + p.areaValue + "</option>");
21                 });
22 
23                 $("#provinceId").change(function () {
24                     //用attr()方法獲取當前選擇的option的value值(即p.id ,數據庫裏的id值,
25                     //雖然在TestController中的getCity方法中傳入的是string類型的形參,可是後來須要變換成int類型, 因此value值應該爲數字)
26                     var pName = $("#provinceId").attr("value");
27                     $.getJSON("ErJLD/getCity?pName=" + pName, getcity);
28                 });
29             });
30         });
31            
32       
33         
34 
35         function getcity(obj) {         
36             $("#cityId").empty();
37                         $.each(obj, function (m, v) {
38                             $("#cityId").append("<option >" + v.areaValue + "</option>");
39                         });
40        
41                     };
42                
43               
44             
45 
46     </script>
47 </body>
48 
49 Index.cshtml
View Code

 ErJLDController.csapp

 1 namespace Mvcproject.Controllers
 2 {
 3     //二級聯動
 4     public class ErJLDController : Controller
 5     {
 6 
 7         ZjbEntities db = new ZjbEntities();
 8         //
 9         // GET: /Test/
10         
11         public ActionResult Index()
12         {
13             //pro_city province=new pro_city();
14             
15             return View();
16         }
17 
18         public JsonResult getProvince() {
19             
20             List<pro_city> provinceList = (from p in db.pro_city where p.level == 1 select p).ToList();
21   
22 
23             JsonResult Jprovince = new JsonResult();
24             Jprovince.Data = provinceList;
25             Jprovince.JsonRequestBehavior = JsonRequestBehavior.AllowGet;
26             return Jprovince;
27 
28         }
29 
30         public JsonResult getCity(string pName)
31         {
32 
33             //string pid = (from p in db.pro_city where p.areaValue == pName select p.id).ToString();
34             //int id = int.Parse(pid);
35             int id = int.Parse(pName);
36 
37             List<pro_city> cityList = (from p in db.pro_city where p.parentId == id select p).ToList();
38   
39             JsonResult Jcity = new JsonResult();
40             Jcity.Data = cityList;
41             Jcity.JsonRequestBehavior = JsonRequestBehavior.AllowGet;
42             return Jcity;
43 
44         }
45        
46     }
47 }
48 
49 ErJLDController.cs
View Code
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