1、先新建一个 JsonConvertResult:JsonResult，继承自JsonResult;

public class JsonConvertResult : JsonResult    {        /// 
        /// 格式化字符串        /// 
        public string FormateStr        {            get;            set;        }        /// 
        /// 重写执行视图        /// 
        /// 上下文        public override void ExecuteResult(ControllerContext context)        {            if (context == null)            {                throw new ArgumentNullException("context");            }            HttpResponseBase response = context.HttpContext.Response;            if (!string.IsNullOrEmpty(this.ContentType))            {                response.ContentType = this.ContentType;            }            else            {                response.ContentType = "application/json";                //response.setContentType("text/html;charset=utf-8");            }            if (this.ContentEncoding != null)            {                response.ContentEncoding = this.ContentEncoding;            }            if (this.Data != null)            {                JavaScriptSerializer jss = new JavaScriptSerializer();                string jsonString = jss.Serialize(Data);                string p = @"\\/Date\((\d+)\)\\/";                MatchEvaluator matchEvaluator = new MatchEvaluator(this.ConvertJsonDateToDateString);                Regex reg = new Regex(p);                jsonString = reg.Replace(jsonString, matchEvaluator);                JsonSerializerSettings set = new JsonSerializerSettings();                set.NullValueHandling = NullValueHandling.Ignore;                //string jsonString = ExtJsonManager.SerializeObject(Data);                response.Write(jsonString);            }        }        /// 
          /// 将Json序列化的时间由/Date(1294499956278)转为字符串 .        /// 
          /// 正则匹配        /// 
     
      格式化后的字符串
             private string ConvertJsonDateToDateString(Match m)        {            string result = string.Empty;            DateTime dt = new DateTime(1970, 1, 1);            dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));            dt = dt.ToLocalTime();            result = dt.ToString(FormateStr);            return result;        }    }

2、BaseController中重写Json返回值方法就可以了。

protected override JsonResult Json(object data, string contentType, System.Text.Encoding contentEncoding, JsonRequestBehavior behavior)        {            return new JsonConvertResult            {                Data = data,                ContentType = contentType,                ContentEncoding = contentEncoding,                JsonRequestBehavior = behavior,                FormateStr = "yyyy-MM-dd HH:mm:ss"            };        }