Excel Library for C# and VB.NET applications

The fastest way to get started with the GemBox.Spreadsheet library is by exploring our collection of C# and VB.NET examples. These are live examples that show the supported features and APIs that can be used to achieve various Excel-related tasks with the GemBox.Spreadsheet component.

System Requirements

GemBox.Spreadsheet requires only .NET, it doesn't have any other dependency.
You can use it on:

  • .NET Framework 3.5 - 4.8
  • .NET Core 3.1 (.NET 5 & 6 for Windows)
  • .NET Standard 2.0 (.NET 5 & 6 for Linux, macOS, Android, iOS, …)

Hello World

The first step in using the GemBox.Spreadsheet library is to add a reference to GemBox.Spreadsheet.dll within your C# or VB.NET project. There are three ways to do that.

a) Add from NuGet.

You can add GemBox.Spreadsheet as a package using the following command from the NuGet Package Manager Console:

Install-Package GemBox.Spreadsheet

Or you can search and add GemBox.Spreadsheet from the NuGet Package Manager.

Adding GemBox.Spreadsheet library from NuGet

b) Add from a DLL file.

You can download a GemBox.Spreadsheet.dll file from this page and add a reference by browsing to it.

Adding GemBox.Spreadsheet library from DLL

c) Add from Setup.

You can download the GemBox.Spreadsheet Setup from this page. After installing the setup, you can add a reference to GemBox.Spreadsheet.dll from the Global Assembly Cache (GAC).

Adding GemBox.Spreadsheet library from GAC

The second step is to add a directive for the GemBox.Spreadsheet namespace.

For a C# project, use: using GemBox.Spreadsheet;
For a VB.NET project, use: Import GemBox.Spreadsheet

The third step is to set the license key to use GemBox.Spreadsheet in one of its working modes.

To use a Free mode in a C# project, use: SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY");
To use a Free mode in a VB.NET project, use: SpreadsheetInfo.SetLicense("FREE-LIMITED-KEY")

You can read more about GemBox.Spreadsheet's working modes on the Evaluation and Licensing help page.

The last step is to write your application-specific Excel workbook code, like the following example code, which shows how to create a simple Excel workbook. It shows how to initialize the GemBox.Spreadsheet content model, populate some cells, and then save an ExcelFile object to a file in the desired format.

Simple Excel file created with GemBox.Spreadsheet
Screenshot of simple Excel file created with GemBox.Spreadsheet
using GemBox.Spreadsheet;

class Program
    static void Main()
        // If using Professional version, put your serial key below.

        var workbook = new ExcelFile();
        var worksheet = workbook.Worksheets.Add("Hello World");

        worksheet.Cells[0, 0].Value = "English:";
        worksheet.Cells[0, 1].Value = "Hello";

        worksheet.Cells[1, 0].Value = "Russian:";
        // Using UNICODE string.
        worksheet.Cells[1, 1].Value = new string(new char[] { '\u0417', '\u0434', '\u0440', '\u0430', '\u0432', '\u0441', '\u0442', '\u0432', '\u0443', '\u0439', '\u0442', '\u0435' });

        worksheet.Cells[2, 0].Value = "Chinese:";
        // Using UNICODE string.
        worksheet.Cells[2, 1].Value = new string(new char[] { '\u4f60', '\u597d' });

        worksheet.Cells[4, 0].Value = "In order to see Russian and Chinese characters you need to have appropriate fonts on your PC.";
        worksheet.Cells.GetSubrangeAbsolute(4, 0, 4, 7).Merged = true;

        workbook.Save("Hello World.%OutputFileType%");
Imports GemBox.Spreadsheet

Module Program

    Sub Main()

        ' If using Professional version, put your serial key below.

        Dim workbook As New ExcelFile()
        Dim worksheet = workbook.Worksheets.Add("Hello World")

        worksheet.Cells(0, 0).Value = "English:"
        worksheet.Cells(0, 1).Value = "Hello"

        worksheet.Cells(1, 0).Value = "Russian:"
        ' Using UNICODE string.
        worksheet.Cells(1, 1).Value = New String(New Char() {ChrW(&H417), ChrW(&H434), ChrW(&H440), ChrW(&H430), ChrW(&H432), ChrW(&H441), ChrW(&H442), ChrW(&H432), ChrW(&H443), ChrW(&H439), ChrW(&H442), ChrW(&H435)})

        worksheet.Cells(2, 0).Value = "Chinese:"
        ' Using UNICODE string.
        worksheet.Cells(2, 1).Value = New String(New Char() {ChrW(&H4F60), ChrW(&H597D)})

        worksheet.Cells(4, 0).Value = "In order to see Russian and Chinese characters you need to have appropriate fonts on your PC."
        worksheet.Cells.GetSubrangeAbsolute(4, 0, 4, 7).Merged = True

        workbook.Save("Hello World.%OutputFileType%")

    End Sub

End Module

See also

Next steps

GemBox.Spreadsheet is a .NET component that enables you to read, write, edit, convert, and print spreadsheet files from your .NET applications using one simple API.

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