Importing data from Excel is a common requirement in ASP.NET Core applications. Whether you're building an HR system, inventory platform, CRM, or financial dashboard, chances are you'll eventually need to process spreadsheet data uploaded by users.
At first glance, reading an Excel file seems straightforward: upload the file, open the workbook, and loop through the rows. In practice, real-world imports often involve validation, missing values, and data transformation before records can be used by the application.
In this article, we'll walk through the complete process of reading Excel files in ASP.NET Core. You'll learn how to:
Upload an Excel file from a web application
Open and access worksheets
