A free library for creating Excel add-ins and user-defined functions using .NET languages like C# and VB.NET.
Excel-DNA is a free, open-source library that allows developers to create Excel add-ins and user-defined functions using .NET languages like C# and VB.NET. It solves the problem of extending Excel with custom business logic, data processing, and integration capabilities beyond what is possible with VBA or native Excel functions. The library provides a bridge between Excel's calculation engine and the .NET runtime, enabling high-performance, compiled code execution within spreadsheets.
Developers and data professionals who need to extend Excel with custom calculations, integrate external data sources, or build complex business tools using .NET technologies. This includes financial analysts, quantitative developers, and enterprise software engineers working with Excel-based solutions.
Developers choose Excel-DNA because it offers a free, lightweight alternative to commercial Excel add-in frameworks, with full support for modern .NET languages and seamless integration into Excel's interface. Its unique selling point is the ability to create high-performance, compiled add-ins without the overhead and licensing costs of traditional COM-based approaches.
Excel-DNA - Free and easy .NET for Excel. This repository contains the core Excel-DNA library.
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Supports C#, VB.NET, and F#, allowing developers to leverage the full .NET ecosystem for Excel add-ins, as highlighted in the key features for language support.
Runs compiled .NET code for fast calculations, outperforming VBA and enabling complex data processing within Excel workbooks, per the performance emphasis.
Packages add-ins as single .xll files, simplifying distribution and loading in Excel without complex setup, as noted in the deployment simplicity feature.
Enables creation of UDFs, ribbon interfaces, and custom task panes with COM interop, providing deep integration into Excel's native ecosystem from the key features.
Primarily designed for Windows Excel, with poor support for Mac or Excel Online, limiting cross-platform usage despite .NET Core compatibility.
Requires users to have .NET Framework or .NET Core installed, adding deployment complexity and potential compatibility issues compared to VBA.
Demands proficiency in both Excel's object model and .NET development, which can be challenging for VBA developers transitioning to this framework.