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NPOI is a pure .NET library for reading and writing Microsoft Office files in both legacy binary (.xls) and modern OpenXML (.xlsx, .docx) formats, operating entirely without requiring Microsoft Office or COM interop. It runs on Windows and Linux under .NET Standard and .NET Framework runtimes, using only managed code to parse and generate Office documents. The library provides comprehensive spreadsheet capabilities, including creating, editing, and reading Excel workbooks in both .xls and .xlsx formats, with support for cell formatting, styles, and formulas. It includes a streaming row-by-row
EPPlus-Excel spreadsheets for .NET
Fast and easy to use cross-platform .NET library that creates or modifies Microsoft Word (DocX) and later also Excel (XLSX) files without installing any software. Library is based on Open XML SDK
MatchFlow is a full-stack invoice processing and purchase-order matching system—built on Clean Architecture with a React+Nginx front-end, a .NET 6 API back-end, Azure Form Recognizer OCR, Azure Blob Storage, and Docker Compose for one-command local setup.
PowerPoint .NET library for reading, modifying, and generating PPTX presentations without Microsoft Office
The main features of shapecrawler/shapecrawler are: Office Automation.
Open-source alternatives to shapecrawler/shapecrawler include: nissl-lab/npoi — NPOI is a pure .NET library for reading and writing Microsoft Office files in both legacy binary (.xls) and modern… epplussoftware/epplus — EPPlus-Excel spreadsheets for .NET. evotecit/officeimo — Fast and easy to use cross-platform .NET library that creates or modifies Microsoft Word (DocX) and later also Excel… excel-dna/exceldna — Excel-DNA - Free and easy .NET for Excel. This repository contains the core Excel-DNA library. exceldatareader/exceldatareader — ExcelDataReader is a C# library used to extract data and metadata from Microsoft Excel spreadsheets and CSV files. It… datpham0412/invoice-processor — MatchFlow is a full-stack invoice processing and purchase-order matching system—built on Clean Architecture with a…