How to export data to XLSX file in C#.NET

EasyXLS Excel library can be used to export Excel files in C#. The library works with .NET Framework or .NET Core platform.

Step 1: Download and install EasyXLS Excel Library for .NET

To download the trial version of EasyXLS Excel Library, press the below button:

Download EasyXLS™ Excel Library for C#

If you already own a license key, you may login and download EasyXLS from your account.

Step 2: Create a C# project

If don't have a project, create one as ASP.NET web application, windows forms app, console application, class library or service.

Step 3: Include EasyXLS library into project

EasyXLS.dll must be added as reference to your project. EasyXLS.dll can be found after installing EasyXLS, in "Dot NET version" folder.

Add EasyXLS reference

Step 4: Run C# code that exports data to Excel XLSX file

Execute the following C# code that exports to XLSX file.

/* ----------------------------------------------------------------
 * Tutorial 04
 * This tutorial shows how to export data to XLSX file that has
 * multiple sheets in C#. The first sheet is filled with data.
 * ----------------------------------------------------------------- */

using System;
using EasyXLS;
using EasyXLS.Constants;

public class Tutorial04
    static void Main()
        Console.WriteLine("Tutorial 04\n----------\n");

        // Create an instance of the class that exports Excel files, having two sheets
        ExcelDocument workbook = new ExcelDocument(2);
        // Set the sheet names
        workbook.easy_getSheetAt(0).setSheetName("First tab");
        workbook.easy_getSheetAt(1).setSheetName("Second tab");

        // Get the table of data for the first worksheet
        ExcelTable xlsFirstTable = ((ExcelWorksheet)workbook.easy_getSheetAt(0)).easy_getExcelTable();

        // Add data in cells for report header
        for (int column=0; column<5; column++)
            xlsFirstTable.easy_getCell(0,column).setValue("Column " + (column + 1)); 

        // Add data in cells for report values
        for (int row=0; row<100; row++)
            for (int column=0; column<5; column++)
                xlsFirstTable.easy_getCell(row+1,column).setValue("Data " + (row + 1) + ", " + (column + 1)); 

        // Set column widths
        xlsFirstTable.setColumnWidth(0, 70);
        xlsFirstTable.setColumnWidth(1, 100);
        xlsFirstTable.setColumnWidth(2, 70);
        xlsFirstTable.setColumnWidth(3, 100);
        xlsFirstTable.setColumnWidth(4, 70);

        // Export the XLSX file
        Console.WriteLine("Writing file C:\\Samples\\Tutorial04 - export data to Excel.xlsx.");
        workbook.easy_WriteXLSXFile("C:\\Samples\\Tutorial04 - export data to Excel.xlsx");

        // Confirm export of Excel file
        String sError = workbook.easy_getError();
        if (sError.Equals(""))
            Console.Write("\nFile successfully created. Press Enter to Exit...");
            Console.Write("\nError encountered: " + sError + "\nPress Enter to Exit...");

        // Dispose memory


EasyXLS Excel libraries:

Excel Library for C#
full .NET version to import, export or convert Excel files
Excel Writer for C#
.NET version to create and export Excel files
Download EasyXLS™ Excel Library for C#

File formats:

MS Excel 97 - 2003
MS Excel 2007 - 2010
MS Excel 2013
MS Excel 2016
MS Excel 2019