Question

We have all heard that XPS is Microsoft’s answer to Adobe’s PDF. Since PDF File has password facility so i was wondering is there any such facility in XPS Files also.

Why and where I want it :-

I need to display some books which are stored in file system in XPS format. I do not want user to open them without my app because in my app i have Document Viewer where i have disabled printing and copying.

Now can I provide password in those XPS files so that they cannot be opened outside my app?

Answer 1

I was also looking such thing. and finally i got to know that XPS files are xml formatted files. and its also globally known so if some how you get the knowledge to how to protect. Than it self its not quite safe. May be you change the extension for these files.
What I did for this is I created a custom file extension for these files and provided my own encryption and then after I could open these files only into my wpf application. Here are some link these could help you.

http://msdn.microsoft.com/en-us/library/ms748388.aspx

http://msdn.microsoft.com/en-us/magazine/cc163664.aspx

http://xpsreader.codeplex.com/

http://www.ericsink.com/wpf3d/B_Printing.html

http://blogs.msdn.com/b/ptallett/archive/2006/05/11/595612.aspx