如何使用EPPlus和MVC从服务器下载.xslx文件

I have an Excel file generated on the server by using EPPlus the file is correctly made and using a window.location works fine on the local machine but does nothing when its deployed to a server. I'm trying to return a FileStreamResult back through the MVC controller but i don't think it's working. i'm using an ajax call to access the controller method but it fails to enter .done when the method is run through.I have an Excel file generated on the server by