无人地磅自助机开发总结（四）将抓拍的图片转成base64传给后台

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/// <summary>   /// Image 转成 base64   /// </summary>   /// <param name="fileFullName"></param>   public static string ImageToBase64(string fileFullName)   {       try       {           Bitmap bmp = new Bitmap(fileFullName);           MemoryStream ms = new MemoryStream();           var suffix = fileFullName.Substring(fileFullName.LastIndexOf('.') + 1,               fileFullName.Length - fileFullName.LastIndexOf('.') - 1).ToLower();           var suffixName = suffix == "png"               ? ImageFormat.Png               : suffix == "jpg" || suffix == "jpeg"                   ? ImageFormat.Jpeg                   : suffix == "bmp"                       ? ImageFormat.Bmp                       : suffix == "gif"                           ? ImageFormat.Gif                           : ImageFormat.Jpeg;             bmp.Save(ms, suffixName);           byte[] arr = new byte[ms.Length]; ms.Position = 0;           ms.Read(arr, 0, (int)ms.Length); ms.Close();           return Convert.ToBase64String(arr);       }       catch (Exception ex)       {           return null;       }     }