ARTICLE
Screens, List Box with Value List from PBO Module
The example shows the method (not recommended) of activating a dropdown
list box.
ABAP_SOURCE_CODE
ABAP_EXEC
ABAP_DESCRIPTION
The static next screen number of screen 100 is 200. The input field has
been assigned the component CARRIER2 of the structure
DEMOF4HELP from the ABAP Dictionary. Its dropdown
attribute is L, the output length is 15, the value list attribute
is empty, and it has been assigned the function code CARRIER . The
function code of the pushbutton is CANCEL with function type
E . The screen flow logic is as follows:
PROCESS BEFORE OUTPUT.
PROCESS AFTER INPUT.
MODULE cancel AT EXIT-COMMAND.
MODULE user_command_100.
The static next screen number of screen 200 is 100. The input field has
been assigned the component CONNID of the structure
DEMOF4HELP from the ABAP
Dictionary. Its dropdown attribute is L, the output length is 30,
the value list attribute is A, and it has been assigned the
SELECTED function code. The function code of the pushbutton is
CANCEL with the function type E . The screen flow logic is
as follows:
PROCESS BEFORE OUTPUT.
MODULE init_listbox.
PROCESS AFTER INPUT.
MODULE cancel AT EXIT-COMMAND.
MODULE user_command_200.
The user is not allowed to enter values in the screen fields. When
choosing the input field on screen 100, the user sees a value list in th
e list box derived from the input help of the DEMOF4HELP-CARRIER2
field. In this case, this is the search help H_SCARR assigned to
the SCARR check table in the
Dictionary. The value list contains the names of the airlines. When the
user selects an entry, the screen field is filled with the ID of the
airline, and the event PAI is triggered. The module
user_command_100 checks the OK field and calls screen 200.
In the PBO event of screen 200, the system fills an internal
table called list with values from database table
SPFLI . The key component is
filled with flight connection numbers, and the corresponding information
is stored in text . The list table is passed to the
VRM_SET_VALUES function module. When the user chooses the input
field on screen 200, the internal table column text is displayed
in the list box. When the user selects an entry, the screen field is
filled with the associated entry from the key column, and the
event PAI is triggered. The module user_command_200 checks
and processes the OK field.
Documentation extract taken from SAP system, � Copyright SAP AG. All rights reserved