How to Import Excel Data in ASP.NET Core (Upload, Parse and Read Worksheets)

The article explains how to build an Excel upload-and-import workflow in ASP.NET Core using Spire.XLS.

It covers accepting an uploaded IFormFile, validating the file, and opening the Excel workbook.

It then shows how to choose worksheets, read rows and columns, and map spreadsheet data into C# objects.

The pattern is useful for common backend import features that need structured Excel data processing.