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  • [转载]mvc使用JsonResult返回Json数据

    controller 中定义以下方法:

     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(5);
                //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 = "12";
                var name1 = "小华";
                var age1 = "12";
                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 = 22, Sex = "" };
                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;
            }

    页面调用:

    <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[0].name);
                    obj.attr("actionValue", data[0].result);
                }
            })
        }
    </script>

    以上是在mvc中使用,在webform中怎么使用呢?
    在webform中要引用Newtonsoft.Json.dll;
    当然你也可以自己拼接字符串。

    protected void Page_Load(object sender, EventArgs e)
            {
                var customer = new customer { name = "李华", sex = "" };
                var customer1 = new customer { name = "小芳", sex = "" };
                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; }
            }

    页面方法:

    <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>

    显示结果:

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  • 原文地址:https://www.cnblogs.com/iack/p/3520132.html
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