#region 圖片的Base64
        /// <summary>
        /// 圖片的Base64轉換
        /// </summary>
        public class ImageBase64
        {
            /// <summary>
            /// 將圖片資料轉換為Base64字串
            /// </summary>
            /// <param name="imagefilepath">檔案路徑</param>
            public static String ImageToBase64(String imagefilepath)
            {
                byte[] bytes = FileUtil.getBytes(imagefilepath);
                string base64 = Convert.ToBase64String(bytes);
                return base64;
            }

            /// <summary>
            /// 將Base64字串轉換為圖片
            /// </summary>
            /// <param name="Strbase64">圖片的Base64值</param>
            public static Image Base64ToImage(string Strbase64)
            {
                byte[] bytes = Convert.FromBase64String(Strbase64);
                System.IO.MemoryStream ms = new System.IO.MemoryStream(bytes);
                System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
                return img;
            }
        }
        #endregion