Apply Excel auto-filter for sheet in C# using EasyXLS library for XLSX, XLS, XLSM, XLSB files!
https://www.easyxls.com/manual/tutorials/csharp/apply-filter-excel.html

Export Excel file with rich text format in cells using EasyXLS library! XLS, XLSX, XLSM, XLSB file in .NET.
http://www.easyxls.com/manual/tutorials/csharp/excel-rich-text-cell.html

Freeze first row when exporting Excel file in C# using EasyXLS library! XLS, XLSX, XLSM, XLSB file in .NET.
http://www.easyxls.com/manual/tutorials/csharp/excel-freeze-row-column.html

Export Excel file and grouping rows or columns in sheet using EasyXLS library! XLS, XLSX, XLSM, XLSB file in .NET.
http://www.easyxls.com/manual/tutorials/csharp/excel-group-rows-columns.html

Export data to CSV file in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6 and more, ASP.NET, MVC, from datatable or from list!
http://www.easyxls.com/manual/basics/export-to-csv-file-format.html

Export Excel file with image into sheet using EasyXLS library! XLS, XLSX, XLSM, XLSB file in .NET.
http://www.easyxls.com/manual/tutorials/csharp/insert-excel-image.html

Export data to HTML file in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VB6 and more, ASP.NET, MVC, from datatable or from list!
http://www.easyxls.com/manual/basics/export-to-html-file-format.html

Export and open an Excel file in browser using Response stream in C#, VB.NET, ASP.NET, ASP classic! XLS, XLSX, XLSM, XLSB spreadsheets by EasyXLS.
http://www.easyxls.com/manual/tips-and-tricks/open-excel-in-browser-response-stream.html

Group rows and columns data in C#, VB.NET, Java, PHP, ASP classic, C++, C++.NET, VBS, VB6, ColdFusion! XLS, XLSX, XLSM, XLSB spreadsheets.
http://www.easyxls.com/manual/basics/excel-group-outline-levels.html

Create Excel file with hyperlink to cell, hyperlink to file, hyperlink to sheet or URL using EasyXLS library! XLS, XLSX, XLSM, XLSB file in .NET.
http://www.easyxls.com/manual/tutorials/csharp/excel-hyperlink-cell-file-sheet-url.html