public JsonResult UpdateSingle(int id, string actionName, string actionValue)

        {

            var res = new JsonResult();

            //var value = "actionValue";

            //db.ContextOptions.ProxyCreationEnabled = false;

            var list = (from a in db.Articles

                        select new

                        {

                            name = a.ArtTitle,

                            yy = a.ArtPublishTime

                        }).Take();

            //记得这里要select new 否则会报错：序列化类型 System.Data.Entity.DynamicProxies XXXXX 的对象时检测到循环引用。

            //不select new 也行的加上这句 //db.ContextOptions.ProxyCreationEnabled = false;

            res.Data = list;//返回列表

            var name = "小华";

            var age = "";

            var name1 = "小华";

            var age1 = "";

            res.Data = new object[] { new { name, age }, new { name1, age1 } };//返回一个自定义的object数组

            var person = new { Name = "小明", Age = , Sex = "男" };

            res.Data = person;//返回单个对象；

            res.Data = "这是个字符串";//返回一个字符串,意义不大；

            res.JsonRequestBehavior = JsonRequestBehavior.AllowGet;//允许使用GET方式获取，否则用GET获取是会报错。

            return res;

        }

<a href="javascript:void(0);" onclick="javascript:upclick(this);">Click Me</a>

<script type="text/javascript">

    function upclick(o) {

        var obj = $(o);

        alert(obj);

        $.ajax({

            url: "/Articles/UpdateSingle?ran=" + Math.random(),

            type: "GET",

            dataType: "json",

            data: { id: obj.attr("id"), actionName: obj.attr("actionName"), actionValue: obj.attr("actionValue") },

            success: function (data) {

//                if (data.result == "True") {

//                    alert("修改成功！");

//                }

//                if (obj.attr("actionName") == "ArtVerify") {

//                }

                $(o).html(data[].name);

                obj.attr("actionValue", data[].result);

            }

        })

    }

</script>

protected void Page_Load(object sender, EventArgs e)

        {

            var customer = new customer { name = "李华", sex = "男" };

            var customer1 = new customer { name = "小芳", sex = "女" };

            var li = new List<customer>();

            li.Add(customer);

            li.Add(customer1);

            var list = Newtonsoft.Json.JavaScriptConvert.SerializeObject(li);

            var tt = "[{\"name\":\"李华\",\"sex\":\"男\"},{\"name\":\"小芳\",\"sex\":\"女\"}]";

            //new Newtonsoft.Json.JsonSerializer()..(customer);

            Response.Write(tt);

            Response.End();

        }

        public class customer

        {

            public string name { get; set; }

            public string sex { get; set; }

        }

<p>

        <a href="javascript:void(0)" onclick="javascript:getJsonData();">GetJsonData</a>

    </p>

    <div id="dataDiv">

        ggg

    </div>

    <script type="text/javascript">

        function getJsonData() {

            var str = "";

            $.getJSON("/Json.aspx", function (data) {

                var tt = "";

                $.each(data, function (k, v) {

                    $.each(v, function (kk, vv) {

                        tt += kk + "：" + vv + "<br/>";

                    });

                });

                $("#dataDiv").html(tt);

            });

        }

    </script>