ABAP ALV steps

https://blog.csdn.net/qq_41401008/article/details/103575163

First step ： Declare variables

TYPE-POOLS:sils.
DATA: lt_fieldcat TYPE slis_t_fieldcat_alv,
wt_fieldcat TYPE slis_fieldcat_alv,
ls_layout TYPE slis_layout_alv.

The second step : Define the inner table
TYPE:BEGIN OF lt_xs,
vbeln TYPE vbak-vbeln,
matnr TYPE vbap_matnr,
END OF lt_xs.
DATA :gw_xs TYPE lt_xs,
gt_xs TYPE TABLE OF lt_xs.

The third step ： Reading data
SELECT vbak~vbeln matnr FROM vbak
LEFT JOIN vbap
on vbak~vbeln = vbap~vbeln
INTO TABLE gt_xs.

Step four ：ALV Format control
ls_layout-zebra = ‘X’.
ls_layout-detail_popup = ‘X’.
ls_layout-detail_titlebar = ‘ Details ’.
ls_layout-f2code = ‘&ETA’.
ls_layout-colwidth_optimize = ‘X’.

wt_fieldcat-fieldname = ‘VBELN’.
wt_fieldcat-col_pos = ‘1’.
wt_fieldcat-key = ‘X’.
wt_fieldcat-datatype = ‘CHAR’.
wt_fieldcat-outputlen = ‘10’.
wt_fieldcat-seltext_m = ‘ Sales voucher ’.
APPEND wt_fieldcat TO lt_fieldcat.

wt_fieldcat-fieldname = ‘MATNR’.
wt_fieldcat-col_pos = ‘2’.
wt_fieldcat-key = ‘X’.
wt_fieldcat-datatype = ‘CHAR’.
wt_fieldcat-outputlen = ‘18’.
wt_fieldcat-seltext_m = ‘ Material number ’.
APPEND wt_fieldcat TO lt_fieldcat.

Step five ：ALV data display
CALL FUNCTION ‘REUSE_ALV_GRID_DISPLAY’
EXPORTING

• I_INTERFACE_CHECK                 = ' '
  

• I_BYPASSING_BUFFER                = ' '
  

• I_BUFFER_ACTIVE                   = ' '
  

• I_CALLBACK_PROGRAM                = ' '
  

• I_CALLBACK_PF_STATUS_SET          = ' '
  

• I_CALLBACK_USER_COMMAND           = ' '
  

• I_CALLBACK_TOP_OF_PAGE            = ' '
  

• I_CALLBACK_HTML_TOP_OF_PAGE       = ' '
  

• I_CALLBACK_HTML_END_OF_LIST       = ' '
  

• I_STRUCTURE_NAME                  =
  

• I_BACKGROUND_ID                   = ' '
  

• I_GRID_TITLE                      =
  

• I_GRID_SETTINGS                   =
  

  IS_LAYOUT = ls_layout
  IT_FIELDCAT = lt_fieldcat

• IT_EXCLUDING                      =
  

• IT_SPECIAL_GROUPS                 =
  

• IT_SORT                           =
  

• IT_FILTER                         =
  

• IS_SEL_HIDE                       =
  

• I_DEFAULT                         = 'X'
  

• I_SAVE                            = ' '
  

• IS_VARIANT                        =
  

• IT_EVENTS                         =
  

• IT_EVENT_EXIT                     =
  

• IS_PRINT                          =
  

• IS_REPREP_ID                      =
  

• I_SCREEN_START_COLUMN             = 0
  

• I_SCREEN_START_LINE               = 0
  

• I_SCREEN_END_COLUMN               = 0
  

• I_SCREEN_END_LINE                 = 0
  

• I_HTML_HEIGHT_TOP                 = 0
  

• I_HTML_HEIGHT_END                 = 0
  

• IT_ALV_GRAPHICS                   =
  

• IT_HYPERLINK                      =
  

• IT_ADD_FIELDCAT                   =
  

• IT_EXCEPT_QINFO                   =
  

• IR_SALV_FULLSCREEN_ADAPTER        =
  

• IMPORTING

• E_EXIT_CAUSED_BY_CALLER           =
  

• ES_EXIT_CAUSED_BY_USER            =
  

  TABLES
  t_outtab = gt_xs
  EXCEPTIONS
  PROGRAM_ERROR = 1
  OTHERS = 2
  .
  IF sy-subrc <> 0.
• Implement suitable error handling here
  ENDIF.