@{    ViewBag.Title = "Index";}<h2>Ajax Demo</h2><div style="width: 600px; ">    <div style="background-color:lightgray">        <h2>Meals</h2>    </div>    <p>Click the button to Get Meals with an Ajax call</p>    <input id="btnAjax" name="btnAjax" type="button" value=http://www.mamicode.com/"Get Meals" />    <div id="meals" style="background-color:lightskyblue"></div>    <div id="jsonResult" style="background-color:lightsalmon"></div></div><div style="background-color:lightpink;display:none;" id="updateMealDiv">    <table>        <tr>            <th>Name</th>            <th>Comments</th>            <th>Picture</th>        </tr>        <tr>            <td><input type="text" id="txtName" name="txtName" /></td>            <td><input type="text" id="txtComment" name="txtComment" /></td>        </tr>    </table>    <input type="button" value=http://www.mamicode.com/"update meal" id="btnUpdateMeal" name="btnUpdateMeal"></div><script type="text/javascript">    $("#btnAjax").click(function () {        $.ajax({            url: ‘/AjaxDemo/GetMeal‘,            contentType: ‘application/html; charset=utf-8‘,            type: ‘Get‘,            datatype: ‘html‘        })        .success(function (data) {            $("#meals").html(data);            $("#updateMealDiv").show().appendTo($("#meals"));        })        .error(function (xhr, status, errorThrown) {            alert(errorThrown);        })    });    $("#btnUpdateMeal").click(function () {        var nameVal = $("#txtName").val();        var commentVal = $("#txtComment").val();        $.ajax({            url: ‘/AjaxDemo/GetJsonString‘,            data: JSON.stringify({ name: nameVal, comment: commentVal }),            type: ‘Post‘,            contentType: "application/json; charset=utf-8"        })        .success(function (data) {            var resultStr = "<ul><li>" + data.newName + "</li><li>" + data.newComment + "</li></ul>";            $("#jsonResult").html(resultStr);        })        .error(function (xhr, status, errorMsg) {            alert(errorMsg);        })    });</script>

 public class AjaxDemoController : Controller    {        private Db dbContext = new Db();        //        // GET: /AjaxDemo/        public ActionResult Index()        {            return View();        }        public ActionResult GetMeal()        {            Meal[] meals = dbContext.Meals.Where(m => m.Id <= 5).ToArray();            return PartialView("GetMeals", meals);        }        public ActionResult GetJsonString(string name, string comment)        {            return Json(new { newName = name + "Luxuan", newComment = comment + "LLLLL" });        }        public ActionResult UpdateMeal(string mName, string comment)        {            IList<Meal> mealList = dbContext.Meals.ToList();            Meal updatedMeal = mealList.Where(m => m.Name == mName).Single();            updatedMeal.Name = mName;            updatedMeal.Comments = comment;            dbContext.SaveChanges();            mealList = mealList.Where(m => m.Id <= 5).ToArray();            return PartialView("GetMeals", mealList);        }    }