public void getSupplyDescImg(HttpContext context)
        {
            List <SupplyImg>            list       = supplyService.getSupplyDescImg(Convert.ToInt32(context.Request["Id"]));
            StringBuilder               sb         = new StringBuilder();
            Dictionary <String, Object> dictionary = new Dictionary <String, Object>();
            string imgPath = "defaultImg.jpg";

            sb.Append("[");
            int i = 1;

            foreach (SupplyImg supplyImg in list)
            {
                if (supplyImg.ImgPath != null)
                {
                    imgPath = System.IO.Path.GetFileName(supplyImg.ImgPath);
                }
                dictionary.Add("DescImg", imgPath);
                sb.Append(JsonUtil.toJson(dictionary));
                if (i < list.Count)
                {
                    sb.Append(",");
                }
                dictionary.Clear();
                i++;
            }
            sb.Append("]");
            context.Response.Write(sb.ToString());
        }