My last post of 2008 was about an Excel library. Coincidentally, my first post of 2009 will be about another Excel library.

This time it is about a free library available on CodePlex: http://www.codeplex.com/ExcelPackage. This library uses the System.IO.Packaging class of the .Net Framework 3.0 that I have introduced in http://www.emoreau.com/Entries/Articles/2008/08/Introducing-SystemIOPackaging.aspx. This library is useful to manipulate Excel 2007 spreadsheets (forget older versions here). Keyvan Nayyeri wrote an article on how to use this library which is available from http://nayyeri.net/blog/use-excelpackage-to-manipulate-open-xml-excel-files/.

Every time I need to handle Excel files (of any versions), I use Aspose.Cells (http://www.aspose.com/categories/file-format-components/aspose.cells-for-.net-and-java/default.aspx).