[HttpPost]

        public ActionResult GetAjaxData()

        {

            List<ADDaAn> daList = new List<ADDaAn>();

            daList = db.ADDaAns.ToList();

            return this.Json(daList);

        }

<script type="text/javascript">

    $(function(){

       $("#div1").hide(); //先让div隐藏

       $("#span1").click(function(){

           $("#div1").fadeIn("slow");//淡入淡出效果 显示div

           $.ajax({

               type: "POST",

               contentType: "application/json",

               url: "GetAjaxData",

               data: "{}",

               dataType: 'json',

               success: function (result) {

                   var jlist = eval(result)

                   for (var i = 0; i < jlist.length; i++) {

                       //将返回数据添加到页面表格中

                       //行中创建三个td对象，并把studentlist中的值赋给它

                       var addtr = document.createElement("tr");

                       var addtd1 = document.createElement("td");

                       addtd1.innerHTML = jlist[i].daXiaoTi;

                       var addtd2 = document.createElement("td");

                       addtd2.innerHTML = jlist[i].daContent;

                       //把创建的td对象加入tr中去

                       addtr.appendChild(addtd1);

                       addtr.appendChild(addtd2);

                       //

                       //把tr加入table中去

                       document.getElementById("datable").appendChild(addtr);

                   }

               }

           });

       });

       $("#span2").click(function(){

          $("#div1").fadeOut("slow");//淡入淡出效果 隐藏div

       })

    });

</script>

       <tr><td>

             <table id="datable"></table>

           </td>

        </tr>