You can use the sample that is in my blog article, the only change you would need to make would be to save the file(s) from the database to the image cache first.  Then you can open them as the article describes.

One of the most sought after features for developers using our products is that of printing multi-page document images through the web using a thin client/AJAX approach.  There are a set of fundamental problems with doing this: Printing can only be done using the browser's print dialog, as there is no direct way to interface with the ...