ExpertXLS Excel Library for .NET

Outside SoftwareSpreadsheet Controls.NET
Version v9.0 (May 12, 2026)(2)

Create and modify Excel files directly within any .NET application.

  • Generate and edit Excel workbooks without requiring Microsoft Excel.
  • Support XLS and XLSX formats across multiple .NET application types.
  • Work with charts, formulas, styles, and worksheet data programmatically.
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Create Excel spreadsheets on the fly with no Microsoft Office dependencies.
ExpertXLS Excel Library for .NET offers creation and editing of Excel spreadsheets across various project types, including web and desktop applications. It supports both legacy and modern Excel file formats, ensuring developers can work with .xls and .xlsx files efficiently. The library requires no external Excel installation and works smoothly even in medium-trust environments such as shared hosting.

Format Support

Handles both XLS and XLSX file formats, enabling broad compatibility with different versions of Excel documents.

No Microsoft Excel Dependency

Functions independently of Microsoft Office Excel, eliminating the need for Excel installation on the server or client machine to create or modify spreadsheets.

Flexible Workbook Creation and Editing

Creates new workbooks from scratch or opens existing Excel files for modification, accepting input from file paths or streams, including password-protected files.

Extensive Worksheet and Cell Management

Manages collections of worksheets, accesses cells and ranges, and allows editing of content, styles, and formulas.

Advanced Features

Supports adding chart worksheets and shapes, images, hyperlinks, comments, formulas including array formulas, and data validation rules within worksheets.

Data Import and Export

Imports data from CSV files and .NET DataTable objects and exports worksheet data back to CSV or DataTable for integration with other systems.

Security and Protection

Offers workbook and worksheet protection features, including read/write password protection and workbook structure locking to secure content.

Document and Print Settings

Allows setting of document properties like author and subject, and configures worksheet page setup options such as headers, footers, margins, and orientation.

Product Compatibility

Review the details below to ensure this product is supported within your environment.

Component Type

  • .NET

.NET Version

  • .NET 4.8 or earlier

.NET Platform

  • .NET Class
  • .NET WPF

IDE Support

  • Visual Studio