Type of image in project's resources

[JezB]

I'm embedding images into the project's resources (eg.
Properties.Resources.SaveImage). At run time I want to extract the image and
save it to disk, but I want to retain the type of the original image (gif,
jpg, etc) and any transparency set in it. How can I do this? I can't seem to
obtain the type of the embedded image resource - the RawFormat property
gives something quite cryptic.

 

[Bob Powell [MVP]]

You can open the image with a stream, read in the first few bytes and decode
the result. All the image types I know of have a simple header with a few
bytes of identification code at the start such as BM for bitmaps, GIF89A or
GIF47 for some Gifs. Other images such as JPEG have a binary numeric header.

Usually however, you can look at the filename extension and take an educated
guess...



--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
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