MagickMissingDelegateErrorException

[dafeifei0218]

  using (Bitmap bitmap = new Bitmap(FilePath))
  {
        byte[] imageBytes = ToByteArray(bitmap);
        byte[] imageBytes2 = Bmp24ToRGBbytes(FilePath);
  
        originalMagickImage = new ImageMagick.MagickImage(imageBytes); //OK
        originalMagickImage = new ImageMagick.MagickImage(imageBytes2); //Error
  }
  
  public static byte[] ToByteArray(Bitmap bmp)
  {
      using (MemoryStream stream = new MemoryStream())
      {
          bmp.Save(stream, ImageFormat.Bmp);
          byte[] data = new byte[stream.Length];
          stream.Seek(0, SeekOrigin.Begin);
          stream.Read(data, 0, Convert.ToInt32(stream.Length));
          return data;
      }
  }
  
  public static byte[] Bmp24ToRGBbytes(string filePath)
  {
      byte[] bytes = null;
  
      using (Bitmap bitmap = new Bitmap(filePath))
      {
          bytes = new byte[bitmap.Width * bitmap.Height * 3];
          int wide = bitmap.Width;
          int i = 0;
          int height = bitmap.Height;
          for (int y = 0; y < height; y++)
          {
              for (int x = 0; x < wide; x++)
              {
                  var srcColor = bitmap.GetPixel(x, y);
                  bytes[i] = srcColor.R;
                  i++;
                  bytes[i] = srcColor.G;
                  i++;
                  bytes[i] = srcColor.B;
                  i++;
              }
          }
      }
  
      return bytes;
  }

Why is the Bmp24ToRGBbytes method Error？
Different lengths，ToByteArray method more 54.

ImageMagick.MagickMissingDelegateErrorException
  HResult=0x80131500
  Message=no decode delegate for this image format `' @ error/blob.c/BlobToImage/460
  Source=Magick.NET-Q16-AnyCPU
  StackTrace:
   在 ImageMagick.NativeInstance.CheckException(IntPtr exception, IntPtr result)
   在 ImageMagick.MagickImage.NativeMagickImage.ReadBlob(IMagickSettings`1 settings, Byte[] data, Int32 offset, Int32 length)
   在 ImageMagick.MagickImage.Read(Byte[] data, Int32 offset, Int32 length, IMagickReadSettings`1 readSettings, Boolean ping, String fileName)
   在 ImageMagick.MagickImage.Read(Byte[] data, IMagickReadSettings`1 readSettings)
   在 ImageMagick.MagickImage.Read(Byte[] data)
   在 ImageMagick.MagickImage..ctor(Byte[] data)
   在 LpbPrj.Client.ViewModels.SlitLampEditViewModel.<>c__DisplayClass18_0.<MainLoadedEvent>b__1() 在 D:\Work\04SuoerWorkstation\src\TestWpfApp\LpbPrj.Client.Template\IOLModule\ViewModels\SlitLampEditViewModel.cs 中: 第 366 行
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

[dlemstra]

The ToByteArray method encodes the image as a bmp but the Bmp24ToRGBbytes method does something different. It stores the raw pixel values instead. To read that I would advise you to use the ReadPixels method instead.