Scan Excel table data and save in SQL Server (Asp.Net MVC 5 C #)

I have an 'input file' that the user will upload the worksheet, I need to check if it is .xlsx or .xls and scan the data of that worksheet. After that, I need to save these items to Sql server.

On verifying the extension use this:

var ext = Path.GetExtension(file.FileName);

var allowedExtensions = new[] { ".xlsx", ".xls" };

if(allowedExtensions.Contains(ext)){ //codigo }

Now my biggest doubt is even being able to scan the spreadsheet data and send it to the bank.

Table that will receive the data contains the columns:

- ID
- Registro
- Nome
- Ativo

I'm starting with ASP.NET, it might be very simple and sorry for that.