I'm learning ASP.NET MVC for creating a web application.

I have 2 models: **fooA** and **fooB** (has an attribute of type **fooA**).
*Controllers* and *Views* generated automatically.

Now, I want to do a little change in the *create view* of **fooB**:

* If there are entries of **fooA** then the normal dropdown appears;
* If there are no entries of **fooA** then a button appears with the following behaviour:
	+ Save the remaining input data;
	+ Redirect to the **fooA** *create view*;
	+ Redirect back to the **fooB** *create view* with the data restored.

I hope I did good job explaining.

My problems start with the question: should I be doing this change in the View or Controller "side"? Then how can I do it?

Thank you.