ReoGrid

Fast and powerful open-source .NET spreadsheet component for building Excel-like experiences in WinForms and WPF applications.

🇯🇵 日本語のREADMEはこちら

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🚀 Upgrade to ReoGrid V4

This repository contains ReoGrid V3 (Community Edition / MIT License).

ReoGrid V4 is now available with major improvements. V4 comes in two editions — Professional and Enterprise — with identical features. Choose based on support duration and deployment scale.

What's new in V4

Feature	V3 Community (this repo)	V4
WinForms support	✅	✅
WPF support	✅	✅ (greatly improved)
Excel XLSX import/export	✅	✅
Formulas & charts	✅	✅ (more functions)
Lazy loading (1M+ rows)	—	✅
Multi-row column headers	—	✅
Data source API (IDataSource)	—	✅
Conditional styles	—	✅
Custom conditional filters	—	✅
Excel-compatible format patterns	—	✅
3-level cell lock control	—	✅
WinAppDriver UI test support	—	✅
Floating-point precision correction	—	✅
Rendering performance	Fast	Even faster
Technical support	—	✅ (included)
License	MIT (free)	Commercial
Price	Free	See pricing

Edition comparison

	Professional	Enterprise
Deployable devices	Up to 3	Unlimited
Technical support	1 month	3 months
Features	Full V4	Full V4

👉 Learn more & Purchase V4 📧 Questions? Contact us at support@reogrid.net

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Features (V3 Community)

• Excel (XLSX) import and export via OpenXML
• Rich cell formatting (font, size, color, borders, alignment, wrapping, rotation)
• Formulas and functions (SUM, COUNT, IF, VLOOKUP, and more)
• Charts, images, and drawing objects
• Merge cells, freeze panes, and split view
• Sorting and AutoFilter (column filters)
• Cell types and controls (checkbox, dropdown, hyperlink, button, etc.)
• Grouping and outline for rows/columns
• Printing and page setup
• High performance with large worksheets
• Extensible rendering and event model

Supported Frameworks

Framework	Target
.NET 8 (Windows)	net8.0-windows7.0
.NET Framework 4.8	net48

Installation

.NET CLI

dotnet add package unvell.ReoGrid.DLL

Package Manager Console (Visual Studio)

Install-Package unvell.ReoGrid.DLL

Quick Start

WinForms

using unvell.ReoGrid;

var grid = new ReoGridControl { Dock = DockStyle.Fill };
this.Controls.Add(grid);

var sheet = grid.CurrentWorksheet;
sheet["A1"] = "Hello ReoGrid";
sheet.Cells["B1"].Data = DateTime.Now;

// Load / Save XLSX
sheet.Load("input.xlsx");
sheet.Save("output.xlsx", FileFormat.Excel2007);

WPF (XAML)

<Window
    x:Class="MyApp.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:rg="clr-namespace:unvell.ReoGrid;assembly=unvell.ReoGrid"
    Title="ReoGrid WPF" Height="450" Width="800">
  <Grid>
    <rg:ReoGridControl x:Name="grid"/>
  </Grid>
</Window>

// Code-behind
var sheet = grid.CurrentWorksheet;
sheet["A1"] = "Hello ReoGrid";
sheet["B1"] = 123.45;

Screenshots

Read from Excel

Charts

Cell Types and Controls

Freeze Panes

Group and Outline

Print Settings

Custom Appearance

Script and Macro

Documentation

• Full documentation, API reference, and tutorials: https://reogrid.net/document
• Getting started guide: https://reogrid.net/document/getting-started/

Demo Project

A runnable WPF sample project is available under the DemoWPF directory.

Contributing

Contributions to V3 Community are welcome! See CONTRIBUTING.md for guidelines.

For feature requests that go beyond V3 scope, consider ReoGrid V4 Enterprise which provides a commercially-supported, actively-developed codebase.

License

MIT License — Copyright (c) UNVELL Inc. 2012–2026, All rights reserved.

See LICENSE for full text.

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About UNVELL

ReoGrid is developed and maintained by UNVELL Inc., a software company specializing in .NET UI components.

• 🌐 Website: https://reogrid.net
• 📧 Support: support@reogrid.net
• 🇯🇵 Japanese page: https://reogrid.net/jp