/// <summary>

        /// 二进制Base64编码转图片

        /// </summary>

        /// <param name="bytes"></param>

        /// <returns></returns>

        public string ByteToPicture(string bytes)

        {

            string[] urls = bytes.Split(',');

            string u = urls[];

            byte[] by = Convert.FromBase64String(u);

            MemoryStream ms = new System.IO.MemoryStream(by);

            Bitmap bmImage = new Bitmap(ms);

            string pName = Context.Server.MapPath("~/File/" + Guid.NewGuid().ToString() + ".png");

            bmImage.Save(pName);

            return pName;

        }