SAP 实例- 下拉框

效果图

 源代码

REPORT rsdemo_dropdown_listbox .

DATA  init.
TABLES scarr.

TABLES spfli.
TABLES sflight.
TABLES sbook.
DATA  save_ok LIKE sy-ucomm.
DATA  ok_code LIKE sy-ucomm.

CALL SCREEN 100.

*&---------------------------------------------------------------------*
*&      Module  STATUS_0100  OUTPUT
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
MODULE status_0100 OUTPUT.
  IF init is initial.
    SET PF-STATUS 'GRUND'.
    SET TITLEBAR '100'.

* preset of listboxes
    spfli-carrid = 'LH'.
    sflight-carrid = 'LH'.
    sbook-carrid = 'LH'.
  ENDIF.

ENDMODULE.                             " STATUS_0100  OUTPUT
*&---------------------------------------------------------------------*
*&      Module  SET_DATA_CARRID  INPUT
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
MODULE set_data_carrid INPUT.
  TYPES: BEGIN OF type_carrid,
         carrid LIKE spfli-carrid,
         carrname LIKE scarr-carrname,
         END OF type_carrid.

  DATA itab_carrid TYPE STANDARD TABLE OF type_carrid WITH HEADER LINE.

  SELECT carrid carrname
                FROM scarr
                INTO CORRESPONDING FIELDS OF TABLE itab_carrid.

  CALL FUNCTION 'F4IF_INT_TABLE_VALUE_REQUEST'
       EXPORTING
            retfield        = 'CARRID'
            value_org       = 'S'
       TABLES
            value_tab       = itab_carrid
       EXCEPTIONS
            parameter_error = 1
            no_values_found = 2
            OTHERS          = 3.
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
            WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
  ENDIF.


ENDMODULE.                             " SET_DATA_CARRID  INPUT
*&---------------------------------------------------------------------*
*&      Module  FILL_CARRID  OUTPUT
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
MODULE fill_carrid OUTPUT.
* Do not use this process (but it works)

  TYPE-POOLS vrm.
  DATA values TYPE vrm_values WITH HEADER LINE.

  IF init is initial.
    SELECT * FROM scarr.
      values-text = scarr-carrname.
      values-key = scarr-carrid.
      APPEND values.
    ENDSELECT.
    CALL FUNCTION 'VRM_SET_VALUES'
         EXPORTING
              id              = 'SBOOK-CARRID'
              values          = values[]
         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.

  ENDIF.
  scarr-carrid = 'LH'.
  init = 'X'.
ENDMODULE.                             " FILL_CARRID  OUTPUT
*&---------------------------------------------------------------------*
*&      Module  EVENT_FROM_LISTBOX  INPUT
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
MODULE event_from_listbox INPUT.
  save_ok = ok_code.
  CLEAR ok_code.
  CASE save_ok.
    WHEN 'LISTBOX_2'.
      MESSAGE i300(eu) WITH save_ok.
    WHEN 'LISTBOX_3'.
      MESSAGE i300(eu) WITH save_ok.
  ENDCASE.
ENDMODULE.                             " EVENT_FROM_LISTBOX  INPUT
*&---------------------------------------------------------------------*
*&      Module  EXIT  INPUT
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
MODULE exit INPUT.
  LEAVE PROGRAM.
ENDMODULE.                             " EXIT  INPUT

屏幕逻辑流