Web Dynpro ABAP

Purpose

Web Dynpro for ABAP or Web Dynpro for ABAP (WD4A, WDA) is the SAP standard UI technology for developing Web applications in the ABAP environment. It consists of a runtime environment and a graphical development environment with special Web Dynpro tools that are integrated in the ABAP Workbench (SE80).

Web Dynpro offers the following advantages for application developers:

● The use of declarative and graphical tools significantly reduces the implementation effort

● Web Dynpro supports a structured design process

● Strict separation between layout and business data

● Reuse and better maintainability by using components

● The layout and navigation is easily changed using the Web Dynpro tools

● Stateful applications are supported – that is, if the page is changed and the required data remains intact so that you can access it at any time throughout the entire application context.

Note that stateless applications are not possible.

● Automatic data transport using data binding

● Automatic input check

● User interface accessibility is supported

● Full integration in the reliable ABAP development environment

BADI in SAP

IMPLEMENTATION OF BADI DEFINITION

1) EXECUTE tcode se18.choose menuitem create from the implementation menubar.
2) Specify aname for implementation ZIM_LINESEL
3) Specify short desc.
4) Choose interface tab. System proposes a name fo the implementation class.
ZCL_IM_IMLINESEL which is already generarted.
5) Specify short desc for method
6) Dbl clk on method to insert code..(check the code in “AAA”).
7) Save , check and activate the code.


Now write a sample program to use this badi method..
Look for “BBB” sample program.


“AAA”

data : wa_flights type sflight,
it_flights type table of sflight.

format color col_heading.
write:/ 'Flight info of:', i_carrid, i_connid.
format color col_normal.

select * from sflight
into corresponding fields of table it_flights
where carrid = i_carrid
and connid = i_connid.

loop at it_flights into wa_flights.
write:/ wa_flights-fldate,
wa_flights-planetype,
wa_flights-price currency wa_flights-currency,
wa_flights-seatsmax,
wa_flights-seatsocc.
endloop.



“BBB”

*&---------------------------------------------------------------------*
*& Report ZBADI_TEST *
*& *
*&---------------------------------------------------------------------*
*& *
*& *
*&---------------------------------------------------------------------*

REPORT ZBADI_TEST .

tables: spfli.

data: wa_spfli type spfli,
it_spfli type table of spfli with key carrid connid.

*Initialise the object of the interface.
data: exit_ref type ref to ZCL_IM_IM_LINESEL,
exit_ref1 type ref to ZIF_EX_BADISPFLI1.

selection-screen begin of block b1.
select-options: s_carr for spfli-carrid.
selection-screen end of block b1.

start-of-selection.
select * from spfli into corresponding fields of table it_spfli
where carrid in s_carr.

end-of-selection.
loop at it_spfli into wa_spfli.
write:/ wa_spfli-carrid,
wa_spfli-connid,
wa_spfli-cityfrom,
wa_spfli-deptime,
wa_spfli-arrtime.

hide: wa_spfli-carrid, wa_spfli-connid.

endloop.


at line-selection.
check not wa_spfli-carrid is initial.
create object exit_ref.
exit_ref1 = exit_ref.

call method exit_ref1->lineselection
EXPORTING
i_carrid = wa_spfli-carrid
i_connid = wa_spfli-connid.

clear wa_spfli.