Types of Controllers in WEB DYNPRO ABAP :
The different types of controllers in web dynpro ABAP are :
1).Component controller.2).Custom controller.
3).Configuration controller.
4).View Controller.
5).Window Controller.
2).Custom controller : Custom controller are optional and they have to be defined at design time & can be used to encapsulate sub functions of the component controller. So multiple custom controller can be defined in a component.
3).Configuration controller : This is a special custom controller. it is only necessary if the corresponding component implements special configuration and personalization functions.Only one configuration controller may exist in any component.Any Controller can access the configuration controller,but the configuration controller cannot access any other controller.
4).View Controller : Each view consists the layout part & exactly one view controller.This controller handles the view specific flow logic ,like checking user input and handling user actions.
5).Window Controller : Each Window has exactly one window controller.this controller can be used to handle the data passed via the inbound plugs when being reused as a child controller.
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