helper classes

[Former Member]

which method will be triggered first in the WEB DYNPRO ABAP? what are the helper class? how it is usefull in web dynpro abap?

[TomVanDoo]

or do you mean "assistance class" instead of helper class?

in that case

it's a plain old abap class based on an interface specific for assistance classes (helps to read texts).

You can assign it to the WDA component as an assistance class, after which it is automatically instantiated and known throughout all parts of your component as wd_assist.

handy to put your business logic in (better known as the "model" in the MVC paradigm)

cheers

Edited by: Tom Van Doorslaer on May 3, 2010 4:32 PM

[thomas_jung]

Kind of an odd grouping of questions.

>which method will be triggered first in the WEB DYNPRO ABAP?

Here is the online help for the Web Dynpro Phase Model:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/d2/8acd409cc4dd50e10000000a1550b0/frameset.htm

>what are the helper class?

Here is the online help for Service Classes and Interfaces:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/5f/1b6541a40c031de10000000a155106/frameset.htm

Here is the online help for APIs:

http://help.sap.com/saphelp_nw70ehp1/helpdata/en/64/be5b4150b38147e10000000a1550b0/frameset.htm

There is nothing specially called a helper class in WD.

[Former Member]

1) WDDOINIT method is triggered first when we executed a WD application.

2) Check out the below link:

http://sapinformation.chandrait.com/2009/05/abap-web-dynpro-lets-make-simple-report.html

In this link, we use the component usages of Select option component. We use the Helper class CL_WDR_SELECT_OPTIONS method SET_GLOBAL_OPTIONS of the WD component WDR_SELECT_OPTIONS.

Hope it helps you.