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.

Learn how to upload files efficiently to minimal API endpoints in ASP.NET Core, using anti-forgery tokens to avoid anti-forgery errors.

Google is your friend. There are a ton of third party libs that will load an excel file into an ado.net dataset. From there you can use the select method to do your search.