asp.net MVC3之AJAX实现（json）

时间：2021-01-12 23:28:25

asp.net MVC3之AJAX实现（json）

        分类：             Asp.net MVC              2011-08-10 13:55     2272人阅读     评论(0)     收藏     举报    
1.建一个mvc3的项目，取名叫MVC3Test
2.修改About.cshtml,如下代码
About.cshtml

 

About.cshtml

@{ ViewBag.Title = "About Us"; } <script type="text/javascript">

$(function () { //get the schools $.get("/Home/GetSchools", function (data) { $(data).each(function () { var o = document.createElement("option"); o.value =this['Id']; o.text =this['Name']; $("#sltSchool")[].options.add(o); }); }); // Get the departments depend on the school $("#sltSchool").change(function () { // initialization the select $("#sltDepartment").empty(); var _o = document.createElement("option"); _o.value ="-1"; _o.text ="select..."; $("#sltDepartment")[].options.add(_o); $.get("/Home/GetDepartments", { schoolId: $("#sltSchool").val() }, function (data) { $(data).each(function () { var o = document.createElement("option"); o.value =this['Id']; o.text =this['Name']; $("#sltDepartment")[].options.add(o); }); }); }); });</script><div><h2> About</h2><p> Put content here. </p><div><span><label> School : </label><select id="sltSchool"><option value="-1">select...</option></select></span><span style="margin-left: 50px"><label> Department :</label><select id="sltDepartment"><option value="-1">select...</option></select></span></div></div>
3.创建几个model
 (1) TestSchool.cs
TestSchool

using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace MVC3Test.Models { publicclass TestSchool { publicint Id { get; set; } publicstring Name { get; set; } } }
 (2) TestSchoolDepartment.cs
TestSchoolDepartment.cs

using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace MVC3Test.Models { publicclass TestSchoolDepartment { publicint Id { get; set; } publicint SchoolId { get; set; } publicstring Name { get; set; } } }
 (3) TestModels.cs
TestModels.cs

using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace MVC3Test.Models { publicclass TestModels { publicstatic List<TestSchool> GetAllSchools() { returnnew List<TestSchool>() { new TestSchool{Id=,Name="ABC"}, new TestSchool{Id=,Name="DEF"}, new TestSchool{Id=,Name="HIJ"}, new TestSchool{Id=,Name="LMN"} }; } publicstatic List<TestSchoolDepartment> GetAllDepartment() { returnnew List<TestSchoolDepartment>() { new TestSchoolDepartment{Id=,SchoolId=,Name="ABC_D1"}, new TestSchoolDepartment{Id=,SchoolId=,Name="ABC_D2"}, new TestSchoolDepartment{Id=,SchoolId=,Name="ABC_D3"}, new TestSchoolDepartment{Id=,SchoolId=,Name="DEF_D1"}, new TestSchoolDepartment{Id=,SchoolId=,Name="DEF_D2"}, new TestSchoolDepartment{Id=,SchoolId=,Name="HIJ_D1"}, new TestSchoolDepartment{Id=,SchoolId=,Name="HIJ_D2"}, new TestSchoolDepartment{Id=,SchoolId=,Name="HIJ_D3"}, new TestSchoolDepartment{Id=,SchoolId=,Name="HIJ_D4"}, new TestSchoolDepartment{Id=,SchoolId=,Name="LMN_D1"} }; } publicstatic List<TestSchoolDepartment> GetDepartmentBySchoolId(int schoolId) { List<TestSchoolDepartment> testSchoolDepartment =new List<TestSchoolDepartment>(); foreach (TestSchoolDepartment department in GetAllDepartment()) { if (department.SchoolId == schoolId) { testSchoolDepartment.Add(department); } } return testSchoolDepartment; } } }
4.由于About是在Home页面里的，所以它的controller应该在HomeController里，我们添加两个controller，如下：
HomeController.cs

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using MVC3Test.Models; using System.Text; namespace MVC3Test.Controllers { publicclass HomeController : Controller { public ActionResult Index() { ViewBag.Message ="Welcome to ASP.NET MVC!"; return View(); } public ActionResult About() { return View(); } 

 public JsonResult GetSchools() { returnJson(TestModels.GetAllSchools (),JsonRequestBehavior.AllowGet); } public JsonResult GetDepartments(int schoolId) { returnJson(TestModels.GetDepartmentBySchoolId(schoolId),JsonRequestBehavior.AllowGet); }

 }}
好了，所有的代码都已完成，现在只要编译、运行项目即可。

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