Ajax取ashx值的有关问题

       $.ajax({            type: 'post', cache: false, dataType: 'json',            url: 'WebHandler/User.ashx',            data: [                    { name: 'Action', value: 'name' }                    ],            success: function (result) {                if (result !== "") {                    alert(result);//result的结果永远是[object]                }            },            error: function () {            },            beforeSend: function () {            },            complete: function () {            }        });

        public void ProcessRequest(HttpContext context)        {            context.Response.ContentType = "text/plain";                string terms = context.Request.Params["Action"];                switch (terms)//得到传的值为 name                {                    case "id":                        context.Response.Write(yjCookie.GetUce.Id);                        break;                    case "name":                        context.Response.Write(yjCookie.GetUce.Name);//调试发现传的值为“测试用户”                        break;                    default:                        context.Response.Write("");                        break;                }            context.Response.End();        }