An SAP Consultant: ABAP - Drop Down List Box on Screen or Selection screen

Use function module VRM_SET_VALUES at AT SELECTION-OUTPUT event if it is SE38 program or at PROCESS BEFORE EVENT if it is module pool program.

To get Drop Drown Box on screen .
Follow these steps.
1.Go to T.Code SE51 and Select Laypout for the Screen.
2.Double click on the field for which u want Dropdown box.
3.Then U will see Name ,Text ,DROPDOWN.Click on that and select List Box

or ListBox with key . Better to to select first one.
4.Save and Activate ur screen .
5.Enter the following piece of code in the PBO of the screen.(Change for ur

requirement).

TYPE-POOLS :vrm.
DATA:
  i_natio TYPE vrm_values, "-->Table that is passed through FM vrm_set_values
  w_natio LIKE LINE OF i_natio.
DATA: 
BEGIN OF i_t005t OCCURS 0,
    land1 TYPE t005t-land1,
    natio TYPE t005t-natio,
END OF i_t005t.

IF i_t005t[] IS INITIAL.
  SELECT land1 natio
     FROM t005t
       INTO TABLE i_t005t
   WHERE spras = sy-langu.
  IF sy-subrc = 0.
    LOOP AT i_t005t .
      w_natio-key = i_t005t-land1.
      w_natio-text = i_t005t-natio.
      APPEND w_natio TO i_natio.
      CLEAR w_natio.
    ENDLOOP.
  ENDIF.
ENDIF.
CALL FUNCTION 'VRM_SET_VALUES'
  EXPORTING
    id              = 'I_IT0002-NATIO' "-->Field for which dropdown is needed.
    values          = i_natio
  EXCEPTIONS
    id_illegal_name = 1
    OTHERS          = 2.
IF sy-subrc <> 0.
  "MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
  " WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.

To get Drop Drown Box on Selection-screen for parameter.

1.define parameter.

PARAMETERS: p_drop type pernr-pernr as listbox.

2.Write down the above code under AT SELECTION-SCREEN OUTPUT event.

2 comments:

UnknownNovember 14, 2016 at 11:57 AM
how to make one of the list values as default and that value should not be repeated twice in the list .because when I am trying to make it as a default , it is displayed twice in the list.
UnknownNovember 14, 2016 at 11:59 AM
how to make one of the values of list as a default value and it should not be repeated twice in the list. kindly help me with this