Can anybody tell me how to call a method on a different controller from within an action method? I don't want to redirect. I want to call a method on a different controller that returns a string and use the response within my action method.
Sounds in my ears like you should refactor your application, and extract the functionality that generates the string out to a new seperate class (or reuse an existing class, if you have one that fits) and let both controllers use that class.