Dropdown list in ALV

By Swarna S, Tata Consultancy Services

****************************************************************************
*Simple code for creating dropdown lists for columns in ALV grid output
*Author : Swarna.S.
* Published at SAPTechnical.COM
****************************************************************************

REPORT zalv_dropdowns.

*Type pools declarations for ALV
TYPE-POOLS : slis.

*data declarations for ALV container,ALV grid, Fieldcatalogues & layout
DATA: g_grid  TYPE REF TO cl_gui_alv_grid,
      g_custom_container TYPE REF TO cl_gui_custom_container,
      gt_fieldcat TYPE lvc_t_fcat,
      gs_layout TYPE lvc_s_layo.

*INTERNAL TABLE AND WA DECLARATIONS FOR t517 A table
DATA: gt_outtab TYPE STANDARD TABLE OF t517a INITIAL SIZE 0,
      wa_outtab TYPE t517a.

*initialisation event
INITIALIZATION.

*Start of selection event
START-OF-SELECTION.

*Call to ALV
  CALL SCREEN 600.

*On this statement double click  it takes you to the screen painter SE51.
*Create a Custom container and name it CCONT and OK code as OK_CODE.
*Save check and Activate the screen painter.
*Now a normal screen with number 600 is created which holds the ALV grid.
* PBO of the actual screen , Here we can give a title and customized menus
* Here we also call the subroutine for ALV output.
*---------------------------------------------------------------------*
*       MODULE PBO OUTPUT                                             *
*---------------------------------------------------------------------*
MODULE pbo OUTPUT.
*  set pf-status 'xxx'.
*  set titlebar 'MAIN100'.
* Subroutine to display the output in alv
  PERFORM alv_output.

ENDMODULE.                    "pbo OUTPUT

* PAI module of the screen created. In case we use an interactive ALV or
*for additional functionalities we can create OK codes and
* based on the user command we can do the coding.

*---------------------------------------------------------------------*
*       MODULE PAI INPUT                                              *
*---------------------------------------------------------------------*
MODULE pai INPUT.

ENDMODULE.                    "pai INPUT
*&---------------------------------------------------------------------*
*&      Form  BUILD_FIELDCAT
*&---------------------------------------------------------------------*

FORM build_fieldcat.

  DATA ls_fcat TYPE lvc_s_fcat.

*Build the field catalogue
  CALL FUNCTION 'LVC_FIELDCATALOG_MERGE'
    EXPORTING
      i_structure_name = 'T517A'
    CHANGING
      ct_fieldcat      = gt_fieldcat.

* To assign dropdown in the fieldcataogue
  LOOP AT gt_fieldcat INTO ls_fcat.

    CASE ls_fcat-fieldname.

      WHEN 'SLART'.
*drdn-hndl = '1' is the first list box
        ls_fcat-drdn_hndl = '1'.
        ls_fcat-outputlen = 15.
        MODIFY gt_fieldcat FROM ls_fcat.

*drdn-hndl = '2' is the second list box

      WHEN 'ABART'.

        ls_fcat-drdn_hndl = '2'.
        ls_fcat-outputlen = 15.
        MODIFY gt_fieldcat FROM ls_fcat.

    ENDCASE.

  ENDLOOP.

ENDFORM.                    "build_fieldcat
*&---------------------------------------------------------------------*
*&      Form  ALV_OUTPUT
*&---------------------------------------------------------------------*
FORM alv_output .

*Create object for container
  CREATE OBJECT g_custom_container
         EXPORTING container_name = 'CCONT'.

*create object for grid
  CREATE OBJECT g_grid
         EXPORTING i_parent = g_custom_container.

* Build fieldcat and set column
*Assign a handle for the dropdown listbox.
  PERFORM build_fieldcat.

*Build layout
  PERFORM build_layout.

* Define a drop down table.
  PERFORM dropdown_table.

*fetch values from the T517A table
  SELECT * FROM t517a INTO TABLE gt_outtab.

*Display ALV output
  CALL METHOD g_grid->set_table_for_first_display
    EXPORTING
      is_layout       = gs_layout
    CHANGING
      it_fieldcatalog = gt_fieldcat
      it_outtab       = gt_outtab.

ENDFORM.                               "ALV_OUTPUT

*&---------------------------------------------------------------------*
*&      Form  dropdown_table
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*  -->  p1        text
*  <--  p2        text
*----------------------------------------------------------------------*
FORM dropdown_table.

*Declarations for drop down lists in ALV.
  DATA: lt_dropdown TYPE lvc_t_drop,
        ls_dropdown TYPE lvc_s_drop.

* First SLART listbox (handle '1').
  ls_dropdown-handle = '1'.
  ls_dropdown-value = '01 Primary school'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '1'.
  ls_dropdown-value = '02 Lower Secondary'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '1'.
  ls_dropdown-value = '03 Upper Secondary'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '1'.
  ls_dropdown-value = '04 Professional School'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '1'.
  ls_dropdown-value = '05 College'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '1'.
  ls_dropdown-value = '06 University'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '1'.
  ls_dropdown-value = '09 Other Establishment'.
  APPEND ls_dropdown TO lt_dropdown.

* Second ABART listbox (handle '2').

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '10 Primary School certificate'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '20 Lower secondary/Junior high'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '30 High school diploma(B-levels)'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '31 Vocational'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '32 Matriculation'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '40 Specialist vocational certificate'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '50 College degree Level1'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '51 College degree Level2'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '52 Masters degree'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '60 Univ Degree level1'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '61 Bachelors degree'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '62 Masters degree'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '63 Licenciate'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '64 Doctors Degree Ph.D'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '89 None'.
  APPEND ls_dropdown TO lt_dropdown.

  ls_dropdown-handle = '2'.
  ls_dropdown-value = '90 Unknown'.
  APPEND ls_dropdown TO lt_dropdown.

*method to display the dropdown in ALV
  CALL METHOD g_grid->set_drop_down_table
    EXPORTING
      it_drop_down = lt_dropdown.

ENDFORM.                               " dropdown_table
*&---------------------------------------------------------------------*
*&      Form  build_layout
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
*layout for ALV output
FORM build_layout .

  gs_layout-cwidth_opt = 'X'.
  gs_layout-grid_title = 'ALV DROPDOWN LISTS'.
  gs_layout-no_toolbar = 'X'.

ENDFORM.                    " build_layout

ALV Dropdown lists output 

Drop down List 1 for field SLART (educational establishment) 

Drop down List 2 for field ABART(certificate)