This project is the .NET version of Apache POI project. With NPOI, you can read/write Office 2003/2007 files very easily.

If you profits/benefits from NPOI, please sponsor me via Github Sponsor or donate this project. Thank you!

NPOI Tutorial on Youtube

How NPOI succeed

Getting Started with NPOI

How to use NPOI on Linux

Useful Packages based on NPOI

NPOI Changelog

NPOI code examples (This example repo is private. You can get access by sponsoring me)

a. It's totally free to use

b. Cover most features of Excel (cell style, data format, formula and so on)

c. Supported formats: xls, xlsx, docx.

d. Designed to be interface-oriented (take a look at NPOI.SS namespace)

e. Support not only export but also import

f. Real successful cases all over the world

g. Works on both Windows and Linux

.NET Standard 2.1 (.NET Core 3.x, .NET 5, .NET 6)

.NET Standard 2.0 (.NET Core 2.x)

.NET Framework 4.0 and above