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

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What's NPOI

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

About Donation 关于捐款

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!

如果您从NPOI受益或实现盈利,请给该项目捐款,谢谢!

Telegram User Group

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

Get Started with NPOI

How NPOI succeeds

NPOI examples

Getting Started with NPOI

How to use NPOI on Linux

ORM on NPOI

NPOI Changelog

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 5, .NET 6)

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

.NET Framework 4.0 and above

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

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