Conversion of BitmapImage to Byte array

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Well I can make the code you’ve got considerably simpler:

public static byte[] ConvertToBytes(this BitmapImage bitmapImage)
{
    using (MemoryStream ms = new MemoryStream())
    {
        WriteableBitmap btmMap = new WriteableBitmap
            (bitmapImage.PixelWidth, bitmapImage.PixelHeight);

        // write an image into the stream
        Extensions.SaveJpeg(btmMap, ms,
            bitmapImage.PixelWidth, bitmapImage.PixelHeight, 0, 100);

        return ms.ToArray();
    }
}

… but that probably won’t solve the problem.

Another issue is that you’re only ever using the size of bitmapImage – shouldn’t you be copying that onto btmMap at some point?

Is there any reason you’re not just using this:

WriteableBitmap btmMap = new WriteableBitmap(bitmapImage);

Can you give us more information about where the error occurs?

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