I am using c# ASP.NET MVC with the razor engine.
I have done a file chooser but what I need to do next is a folder chooser.
Once the user chooses the folder, I need to go and get all the files in that folder and do some processing Please let me know if you have done a folder chooser.
There is no way to do it in ASP.Net/MVC, or any other technology using just HTML/JavaScript in browser: HTML does not provide ability to browse folder on client nor upload all files from given folder.
You need some sort of full trusted client side code to do so.