RE:Web dynpro in ABAP

[alex_georgek]

Hi all,

What is the use of component controller,custom controller and interface controller.In wht senarios we use them.Also please explain about its visibility with other components..

Regards,

Alex.

[former_member206441 · Accepted solution]

Hi

Go through the links

component controller:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/e2/434941db42f423e10000000a155106/frameset.htm

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/44/0dca602d9d1ca2e10000000a11466f/frameset.htm

custom controller:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/44/0dca602d9d1ca2e10000000a11466f/frameset.htm

interface controller:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/44/0dca602d9d1ca2e10000000a11466f/frameset.htm

There will be only one component controller per web dynpro component, this is a global component which drives the overall functionality of entire component

Custom Controllers are optional, they have to be defined at design time to encapsulate sub functions from component controller.

The interface controller contains all context nodes, events and methods of the component controller to which you assigned the Interface addition in the Controller Editor. These parts can be displayed in the interface controller view, although you cannot edit them here.

Regards

Arun.P

[Former Member]

hi

What is the use of component controller,custom controller and interface controller.In wht senarios we use them

Component controller

There is only one component controller per Web Dynpro component. This is a global controller, visible to all other controllers. The component controller drives the functionality of the entire component. This controller has no visual interface. The lifetime of the component controller equals the lifetime of the component. When starting a Web Dynpro application, the component controller is instantiated by the Web Dynpro runtime

Custom controllers

Custom controllers are optional. They have to be defined at design time and can be used to encapsulate sub-functions of the component controller. Multiple custom controllers can be defined in a component. Custom controllers are instantiated automatically by the Web Dynpro framework and the instantiation order is undefined; therefore, the coding in a custom controller should make no assumptions about the existence of any other custom controller. The instantiation of a custom controller is delayed until the first method of the controller is called. Custom controller instances cannot be deleted explicitly.

Interface Controller

The interface controller is used for cross-component communication. It defines the controller part of the interface of a Web Dynpro component. The interface controller itself does not contain any implementation.

For the interface controller of a Web Dynpro controller, the methods are implemented in the related component controller.

For the interface controller of a component interface definition, the implementation is performed in the component controller of the embedding component.

go through this WIKI :

Introduction to controllers

http://wiki.sdn.sap.com/wiki/display/WDABAP/Introductiontocontrollers

and SAP online help :

http://help.sap.com/saphelp_nw70/helpdata/en/b9/b82c4142aef623e10000000a155106/content.htm

regards,

amit

[Former Member]

Hi,

http://help.sap.com/saphelp_nw70/helpdata/EN/03/0048413e466e24e10000000a155106/frameset.htm

Standard SAP Help can answer most of your queries. Do have a look at it.

Regards

Manas Dua