This .NET library enables programming languages like Visual Basic.NET, C#, and ASP.NET to create, modify, and access XLS, XLSX, CSV, and ODS spreadsheet files without the need for MS Office, Excel, or Open Office.

Built with 100% managed code, this library provides full support for a wide range of features, including Unicode text, cells, rows, columns, ranges, and worksheets in spreadsheet documents. You can even read and write formulas, access document properties, and export your spreadsheets to HTML with ease. And thanks to robust cell formatting options (including font and line styles, as well as the ability to merge and unmerge cells), you'll be able to create polished, professional-looking spreadsheets in no time.
Overall, if you're looking for a comprehensive .NET library to help you work with spreadsheet documents in any language, this tool is a must-have. With its numerous features and intuitive interface, you'll be able to create, modify, and share spreadsheets quickly and easily - and without the need for any additional software or tools. So why wait? Try it out today and see how easy it can be to work with spreadsheets in .NET!
Version 1.40:
advanced samples for VB.NET were added (see /Examples/Advanced Examples/ folder
minor bug-fixes
minor documentation updates
Version 1.30.4:
New methods for Range, Cell, Column, Row classes
Worksheet.Active property added to select the worksheet selected by default
bug with non-selected worksheets while writing XLS fixed
updated documentation
XLSX (Excel 2007) handling improved
CSV and ODS (Open Office) support improved
minor bug-fixes
Version 1.11:
minor bug-fixes in XLS reading support for some XLS files
minor internal bug-fixes
Version 1.00: initial version