How to load an arbitrary image from a BLOB stream into a TImage?

Question

If I understand it correctly, TImage.LoadFromFile determines the type of picture from the file extension.

Is there any way to detect the image type auto

Answer 1

In fact it is TPicture.LoadFromFile that detects file type, and it just uses the file extension. So you'll need to read the header of the stream to detect the file type.

On the other hand, if you know what the format is when you put the BLOB into the database you could always include that information as your own private header to the BLOB.