JavaScriptSerializer serializable = new JavaScriptSerializer();
            string json = serializable.Serialize(new { total = total, rows =  list});
            //使用正则表达式来替换被序列化的时间
            json = System.Text.RegularExpressions.Regex.Replace(json, @"\\/Date\((\d+)\)\\/", match =>
            {
                DateTime dt = new DateTime(1970, 1, 1);
                dt = dt.AddMilliseconds(long.Parse(match.Groups[1].Value));
                dt = dt.ToLocalTime();
                return dt.ToString("yyyy-MM-dd HH:mm:ss");
            });
            return json;