From C# to ASP.Net(Web) (client-server)?

Question

ASP.NET

Hello!
I'm starting to study the topic.
Written a program for WIN (winForms).
There are 2 forms:
- on the 1st DataGridView, data is loaded into it (without binding).
- on the 2nd a lot of TextBox

Principle of operation:
- the data is taken from the DataGridView
- the Excel template is opened and the data from the DataGridView (Found-Pasted, just inserting data) and the TextBox are inserted into it
- the output is a filled template with data with saving

What I want to get ( emphasis on the word SERVER):
- client-server application (departure from WINforms)
- client - these are 2 tabs (like 2 forms in WinForms) on the html / php page
- SERVER - this is the algorithm for working with EXCEL (what is tied to the button in winforms)

What were the thoughts:
- use the PHPExcel library (refused, because learning a new language)

I would like to hear advice / examples / links on how to translate all or part of it from C # to ASP (Web).

Answer 1

Choose any report engine.
Yes, even SSRS. True, he has a hard time with an Excel-based template, so you will have to edit it yourself.
The second option is to write a net core service.
Add parser https://github.com/tonyqus/npoi
And adapt your logic. We use it when we create beautiful signs for management
Will work on Linux, MacOS, Windows