What Is an XLSX File? XLSX file extension belongs to Microsoft Excel sheets. Microsoft Excel is used to create data files wherein it stores data in text and numerical forms in cells. There are several ...

What Is an XLSX File? XLSX file extension belongs to Microsoft Excel sheets. Microsoft Excel is used to create data files wherein it stores data in text and numerical forms in cells. There are several ...

Learn how to use the ClosedXML NuGet package to export data as a CSV or XLSX file for Excel from an ASP.NET Core application.

You should now see the .xlsx, .xls, or a similar extension at the end of your Excel file. Right-click on the file and select Rename. Now, alter the extension from .xlsx to .xls. If the file is in a ...