MVC Json方法里的一个坑

      //
        // Summary:
        //     Creates a System.Web.Mvc.JsonResult object that serializes the specified object
        //     to JavaScript Object Notation (JSON).
        //
        // Parameters:
        //   data:
        //     The JavaScript object graph to serialize.
        //
        // Returns:
        //     The JSON result object that serializes the specified object to JSON format. The
        //     result object that is prepared by this method is written to the response by the
        //     ASP.NET MVC framework when the object is executed.
        protected internal JsonResult Json(object data);

public JsonResult getRepChangeTest()
        {
            return Json(myobj);
        }

"rec_dt": "/Date(1498466813000)/",

DateTime.Parse("1970-1-1").AddSeconds(1498466813)

public ContentResult getRepChangeTest2()
        {
            var obj = rptdal.ReportChangeList();
            string json=JsonConvert.SerializeObject(obj);
            return Content(json, "application/json");
        }