Aspose.Cells.FOSS 26.5.0

Aspose.Cells FOSS for .NET

Aspose.Cells FOSS is an open-source .NET library for creating, loading, editing, and saving Excel .xlsx workbooks without requiring Microsoft Excel.

Highlights

• Aspose.Cells-compatible API surface for common XLSX scenarios
• .xlsx load/save from file paths and streams
• Cell values, formulas, styles, merges, and number formats
• Conditional formatting, data validation, hyperlinks, names, tables, charts, shapes, comments, pictures
• Recovery-oriented loading with diagnostics and warning callbacks
• Multi-targeted library: netstandard2.0 and net8.0

Installation

dotnet add package Aspose.Cells.FOSS

Quick Start

Create, style, and save a workbook

using Aspose.Cells_FOSS;

var workbook = new Workbook();
var sheet = workbook.Worksheets[0];

sheet.Name = "Products";
sheet.Cells["A1"].PutValue("Product");
sheet.Cells["B1"].PutValue("Price");
sheet.Cells["A2"].PutValue("Apple");
sheet.Cells["B2"].PutValue(2.99m);
sheet.Cells["A3"].PutValue("Orange");
sheet.Cells["B3"].PutValue(1.99m);
sheet.Cells["B4"].Formula = "=SUM(B2:B3)";

var headerStyle = sheet.Cells["A1"].GetStyle();
headerStyle.Font.IsBold = true;
headerStyle.Font.Color = Color.FromArgb(255, 255, 255, 255);
headerStyle.Pattern = FillPattern.Solid;
headerStyle.ForegroundColor = Color.FromArgb(255, 34, 120, 212);
sheet.Cells["A1"].SetStyle(headerStyle);
sheet.Cells["B1"].SetStyle(headerStyle);

workbook.Save("products.xlsx");

Load workbook with recovery options and diagnostics

using System;
using Aspose.Cells_FOSS;

public sealed class ConsoleWarningCallback : IWarningCallback
{
    public void Warning(WarningInfo warningInfo)
    {
        Console.WriteLine("[{0}] {1}: {2}", warningInfo.Severity, warningInfo.Code, warningInfo.Message);
    }
}

var loadOptions = new LoadOptions
{
    TryRepairPackage = true,
    TryRepairXml = true,
    StrictMode = false,
    WarningCallback = new ConsoleWarningCallback()
};

var workbook = new Workbook("input.xlsx", loadOptions);

if (workbook.LoadDiagnostics.HasRepairs)
{
    Console.WriteLine("Load repairs were applied.");
}

if (workbook.LoadDiagnostics.HasDataLossRisk)
{
    Console.WriteLine("Potential data loss risk detected during load.");
}

workbook.Worksheets[0].Cells["A1"].PutValue("Updated");
workbook.Save("updated.xlsx");

Supported Areas

• Workbook and worksheet management
• Cells and formulas
• Style model (font, fill, borders, alignment, number formats)
• Worksheet settings (visibility, zoom, RTL, gridlines, protection)
• Hyperlinks and defined names
• Data validation and conditional formatting
• Page setup and print-related settings
• Tables (ListObjects)
• Pictures, shapes, and charts
• Document properties

For runnable examples, see samples/:

• Aspose.Cells_FOSS.Samples.Basic
• Aspose.Cells_FOSS.Samples.Loading
• Aspose.Cells_FOSS.Samples.Styles
• Aspose.Cells_FOSS.Samples.WorksheetSettings
• Aspose.Cells_FOSS.Samples.Validations
• Aspose.Cells_FOSS.Samples.ConditionalFormatting
• Aspose.Cells_FOSS.Samples.HyperlinksAndNames
• Aspose.Cells_FOSS.Samples.PageSetup
• Aspose.Cells_FOSS.Samples.Shapes
• Aspose.Cells_FOSS.Samples.Charts
• Aspose.Cells_FOSS.Samples.Comments
• Aspose.Cells_FOSS.Samples.DocumentProperties
• Aspose.Cells_FOSS.Samples.ListObjects
• Aspose.Cells_FOSS.Samples.Pictures

Build from Source

Run commands from the repository root:

dotnet build src\Aspose.Cells_FOSS\Aspose.Cells_FOSS.csproj -c Debug
dotnet build samples\Aspose.Cells_FOSS.Samples.Basic\Aspose.Cells_FOSS.Samples.Basic.csproj -c Debug

Compatibility

Primary targets:

• netstandard2.0
• net8.0

Because the package targets netstandard2.0, it can also be consumed by many compatible runtimes (for example .NET Framework 4.6.1+ and modern .NET).

License

MIT. See License/LICENSE.txt.

Support

• Issues: https://github.com/aspose-cells-foss/Aspose.Cells-FOSS-for-.NET/issues