Aspose.Cells for .NET will generate the PDF same like as Ms-Excel generates or as you view in Print Preview.
So, if your page numbers are not visible in the Excel Print Preview, these will also not be visible in Aspose.Cells output pdf.
If you still find any issue, please provide us your source file. We will look into your issue and help you asap.
Besides, we have lately done some major enhancements and added new features in our product, so you should also download and give a try to latest offline demos of Aspose.Cells which you can find from theses links.
These demos can work with Visual Studio 2005, 2008 or 2010. Please read the readme.txt file before running the demos.
We have logged this issue in our database. We will look into it further and fix this issue. Once the issue is fixed or we have some other update for you, we will let you know asap.
Just some extra information, I'm having other issues related to charts when they are exported to pdf, but most of my problems are similar to those reported on the two topics I mentioned above.
Basically my problems are with the charts appearance when exported to pdf, they look different than they are in the workbook.
I would really appreciate if you could give me some feedback regarding these topics.