Development with the Force.com Platform: Building Business Applications in the Cloud, Third Edition

Visualforce Controllers

Controllers provide the business logic behind Visualforce pages. They supply data to the page, accept input from users through the page, perform actions on behalf of the user, and redirect the browser to new pages. Controllers come in three flavors:

Standard controllers—Force.com provides default controller implementations called standard controllers. They contain the same functionality as found in the native user interface. No custom Apex code is involved in a standard controller.

Custom controllers—Custom controllers ...