Images in RTF file do not display in WordPad

Question

I inserted some images into a flowdocument, then save it as a rtf file.
            Image photo = new Image();
            BitmapImage photoFile = new BitmapImage();
            photoFile.BeginInit();
            photoFile.UriSource = new Uri("image.bmp", UriKind.Relative);
            photoFile.EndInit();
            photo.Source =photoFile;      
            Paragraph pPhoto = new Paragraph();
            pPhoto.Inlines.Add(photo);
            flowdoc.Blocks.Add(pPhoto);
When I open the rtf file with wordpad, all the images are lost. But they can be displayed in Word.
Why does that happen?
Thx.

Answer 1

WordPad (at least version 6.1 on W7) cannot display linked images, MSWord can. WordPad
can display embedded images. But the format seems to be some uncompressed WindowsMetaFile8 format, which may increase the storage footprint, compared to eg. PNG graphics, drastically. (Open a Wordpad RTF in Notepad, you'll see...)
A cross-check against the DotNET 1.1 RTF control shows the same as in Wordpad, linked images do not show up. That leads to the assumption that Windows Forms as well as Wordpad are based on the Windows Common RTF Control, and that control seems
not to support linked images.
I'm not quite sure yet, but WPF converts RTF content to XAML (which is very similar to HTML), so it does not rely on the Windows RTF common control, thus linked images in RTF are not a problem there.
HTH
Ulrich