I'm developing an ASP.NET WebForms application with Entity Framework Database-First connected with SQL Server, and I want to connect the same Entity Data Model with Oracle Database.
My concerns are:
I am doing exactly the same as you
i.e. Converting a ASP.NET MVC application on SQL server to Oracle.
Since your application is already running, what you can do, is
edmxfile from the tables in Oracle and if you do everything properly, your application should be running.
Note: ODP.NET provider is only visible if you have a VS license. It is not visible on the free version.