How to export data to HTML 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 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.

Install the downloaded EasyXLS installer for v8.6 or earlier.

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:
- Inside the downloaded archive at Step 1 for EasyXLS v9.0 or later
- Under installation path for EasyXLS v8.6 or earlier, in "Dot NET version" folder.

Add EasyXLS reference

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

Execute the following C# code that exports data to HTML file.

/* ----------------------------------------------------------
 * Tutorial 31
 * This tutorial shows how to export data to HTML file in C#.
 * ---------------------------------------------------------- */

using System;
using EasyXLS;
using EasyXLS.Constants;

public class Tutorial31
    static void Main()
        Console.WriteLine("Tutorial 31\n----------\n");

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

        // Get the table of data for the 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)); 

        // Apply a predefined format to the cells
        xlsFirstTable.easy_setRangeAutoFormat("A1:E101",new ExcelAutoFormat(Styles.AUTOFORMAT_EASYXLS1));

        // Export HTML file
        Console.WriteLine("Writing file C:\\Samples\\Tutorial31 - export HTML file.html.");
        workbook.easy_WriteHTMLFile( "C:\\Samples\\Tutorial31 - export HTML file.html", "First tab");

        // Confirm export of HTML 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 - 2019
MS Excel 2021
Office 365