konessyu / npoi

a .NET library that can read/write Office formats without Microsoft Office installed. No COM+, no interop.

What's NPOI

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

About Donation

Since Github sponsorship is not supported in China so far, it's hard to get donation from Github channel. I'm strictly limiting my contribution time on NPOI these 2 years although it looks to be still maintained well. If you profits/benefits from NPOI and you believe it's useful, please donate this project. Thank you!

Telegram User Group

Join us on telegram: https://t.me/npoidevs

Get Started with NPOI

Who is using NPOI?

NPOI examples

Getting Started with NPOI

How to use NPOI on Linux

ORM on NPOI

NPOI Changelog

Replace DotnetCore.NPOI with NPOI ASAP

NPOI NEVER joins China NCC (.NET Core Community) group. They are cheating. The readme.md in Dotnetcore.npoi repo is full of lies. What they want to do is just to destory NPOI since they cannot make use of reputation of this component any more. That's why I'm always saying they are evil. The whole NCC group is evil.

NPOI从未加入过**NCC开源组织，他们在欺骗公众！Dotnetcore.npoi的readme.md完全是诽谤，一堆谎言。他们想做的无非就是想毁掉NPOI，因为他们不能再用NPOI来行骗了。这也是我为什么一直说他们很邪恶，整个NCC组织就是一个**。

Stop using Dotnetcore/NPOI nuget package. It’s obsolete!

The real history of Dotnetcore.NPOI 中文版

Advantage of NPOI

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. huge amount of basic examples

h. Works on both Windows and Linux

System Requirement

.NET Standard 2.1 (.NET Core 3.x)

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

.NET Framework 4.0 and above

No Loongson CPU (NPOI will NOT support any issues running on LoognArch architecture. This CPU is a shit)