I don't know any articles solving exactly this problem because this is one particular combination of two unrelated issues: how to work with the data grid and how to write PDF.
I would advise to use the Open-Source library iText, more exactly, the .NET port of it called iTextSharp. Please see:
http://en.wikipedia.org/wiki/IText[
^],
http://itextpdf.com/[
^],
http://sourceforge.net/projects/itextsharp/[
^] (download iTextSharp here).
Now when you know all the keywords, you can try to find some articles which could help you, say, using Google.
Good luck,
—SA