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I spent some of my Labor Day weekend starting to learn Silverlight.  I began when BJ asked me to show him how to program a game.  We started programming a simple Space Invaders style game.  I am going to allow that project to progress at his pace, so I decided to take on a different project to experiment with, a document viewer.

I have been working on a project at work that requires a PDF be embedded in a page, but disallow printing, saving, or copying the document.  We discovered GhostScript’s ability to convert a PDF to a collection of PNG images.  It creates a single PNG file for each page in the PDF.   This allows only the pages that are viewed to be loaded and we don’t have to worry about applying any digital rights management (DRM toolkits are $$$) to the PDF.

The document viewer takes this collection of PNG’s and embeds them into the viewer, so that they can be rotated, zoomed in on, and browsed.

Check out the demo at http://www.aaronkjackson.com/dev/silverlight/DocumentViewer/.

NOTE: The zoom in feature can hide the button bar.  If that happens resize the browser window to a smaller size.  I am working on adding scroll bars to prevent this from happening.

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