ABAP--如何在list屏幕上输出GRID列表

在List输出屏幕输出GRID列表，输出结果如图：

 

代码如下：

REPORT  ZSAPM.

data repid    like sy-repid.

DATA: docking_t tYPE REF TO CL_GUI_DOCKING_CONTAINER,
      g_grid  TYPE REF TO cl_gui_alv_grid,
      gs_layout TYPE lvc_s_layo,
      g_max type i value 100,
      gt_outtab type table of sflight.
parameters p_maxnum type i default 2.

START-OF-SELECTION.
  perform LIST_DOCKER.

AT USER-COMMAND.

*&---------------------------------------------------------------------*
*&      Form  LIST_DOCKER
*&---------------------------------------------------------------------*
*       text
*----------------------------------------------------------------------*
FORM LIST_DOCKER.
  NEW-PAGE NO-HEADING NO-TITLE.
  data:
    i type i.
*leave to list-processing.
  if docking_t is initial.
    CREATE OBJECT docking_t
         EXPORTING
           repid = 'SAPMSSY0'
           dynnr = '120'
           side  = cl_gui_docking_container=>dock_at_top
           extension = 200
         EXCEPTIONS
           cntl_error                  = 1
           cntl_system_error           = 2
           create_error                = 3
           lifetime_error              = 4
           lifetime_dynpro_dynpro_link = 5
           others                      = 6.

    CREATE OBJECT g_grid
           EXPORTING i_parent = docking_t.
*§1.Set status of all cells to editable using the layout structure.
  endif.
  gs_layout-edit = 'X'.
  gs_layout-NO_TOOLBAR = 'X'.
  select * from sflight into table gt_outtab up to p_maxnum  rows.

  CALL METHOD g_grid->set_table_for_first_display
    EXPORTING
      i_structure_name = 'SFLIGHT'
      is_layout        = gs_layout
    CHANGING
      it_outtab        = gt_outtab.
  i = 100.
  do 30 times.
    write: / i, 40 'TEST_________X'.
    i = i + 1.
  enddo.
ENDFORM.                    "LIST_DOCKER