public void GetGifts()
        {
            List<dynamic> gifts = new List<dynamic>();
            Gift allgifts = new Gift();
            allgifts.LoadAll();
            if (allgifts.RowCount > 0)
            {
                for (int i = 0; i < allgifts.RowCount; i++)
                {
                    gifts.Add(new { giftid = allgifts.GiftID, name = allgifts.Name, price = allgifts.IsColumnNull("Price_Point") ? "0" : allgifts.Price_Point.ToString(), picPath = allgifts.PicPath, AudioPath = allgifts.AudioPath });
                    allgifts.MoveNext();
                }
            }

            string result = Newtonsoft.Json.JsonConvert.SerializeObject(gifts);
            HttpContext.Current.Response.ContentType = "application/json; charset=utf-8";
            HttpContext.Current.Response.Write(result);
            //return result;
        }