Base64編碼轉換為圖片

 　　　　/// <summary>
        /// 圖片上傳 Base64解碼
        /// </summary>
        /// <param name="dataURL">Base64數據</param>
        /// <param name="path">保存路徑</param>
        /// <param name="imgName">圖片名字</param>
        ///  <param name="imgSuffix">后綴名</param>
        /// <returns>返回一個相對路徑</returns>
        public static string DecodeBase64ToImage(string dataBase64, string path, string imgName,string imgSuffix)
        {
            string filename = "";//聲明一個string類型的相對路徑
            String base64 = dataBase64.Substring(dataBase64.IndexOf(",") + 1); 
            filename = path + "/" + imgName + imgSuffix;//所要保存的相對路徑及名字
            try
            {
                String inputStr = base64;
                byte[] arr = Convert.FromBase64String(inputStr);
                using (MemoryStream ms2 = new MemoryStream(arr))
                {
                    System.Drawing.Bitmap bmp2 = new System.Drawing.Bitmap(ms2);
                    bmp2.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
                    bmp2.Dispose();
                }
            }
            catch (Exception ex)
            {
                string msg = ex.Message;
            }
            return filename;//返回相對路徑
        }