Download NPOI for XLSX File Processing

NPOI is a powerful open-source library for reading and writing Microsoft Office files, including XLSX format. Download NPOI today to handle Excel files in your .NET applications without requiring Microsoft Office installation.

NPOI Team 2.6.2 15.8 MB

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NPOI - Safe & Fast Download

15.8 MB File Size
2.6.2 Version
Free License

About This Software

NPOI provides comprehensive support for XLSX files, allowing developers to read, write, and manipulate Excel spreadsheets programmatically. The library supports all major Excel features including formulas, styling, charts, and pivot tables. With NPOI, you can process large Excel files efficiently while maintaining data integrity and formatting. The latest version offers improved performance and enhanced compatibility with newer Excel formats.

Key Features

1
Full XLSX format support without Excel dependency
2
Advanced formula calculation and evaluation
3
Rich cell styling and formatting capabilities
4
Support for charts, images, and pivot tables
5
High performance for large Excel files

How to Use

After downloading NPOI, add the DLL references to your .NET project. Import the NPOI namespace and use the XSSFWorkbook and XSSFSheet classes to work with XLSX files. The library provides intuitive methods for reading cell values, creating new spreadsheets, and applying formatting.

Conclusion

Download NPOI now to start working with XLSX files in your .NET applications. Visit our download section to get the latest version and start building powerful Excel processing solutions.

Frequently Asked Questions

Is NPOI free to use for commercial projects?

Yes, NPOI is open-source and free to use for both personal and commercial projects under the Apache License 2.0.

What .NET versions are compatible with NPOI?

NPOI supports .NET Framework 3.5 and later, as well as .NET Core and .NET 5/6/7/8.

Can NPOI handle password-protected Excel files?

Yes, NPOI provides support for reading and writing password-protected XLSX files through its encryption APIs.