ABAP在ALV列表上WRITE一些内容

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本文介绍了一个使用ABAP编程语言生成报告的具体示例。该示例通过定义本地类lcl_report来实现数据获取(get_data)、数据列表展示(write_list)及高级列表视图(ALV)生成(generate_alv)等功能。报告首先从sflight表中根据选择条件筛选数据，然后以不同的形式展示这些数据。

*----------------------------------------------------------------------*
*  Local class for report
*----------------------------------------------------------------------*
CLASS lcl_report DEFINITION.
*
  PUBLIC SECTION.
*
    DATA: t_data   TYPE STANDARD TABLE OF sflight,  " Output data
          r_carrid TYPE RANGE OF sflight-carrid.    " Select Option
*
    METHODS:
      get_data,
      write_list,
      generate_alv.
*
ENDCLASS.                    "lcl_report DEFINITION
*
DATA: o_report TYPE REF TO lcl_report.
*
DATA: v_carrid TYPE sflight-carrid.
*
** Selection Screen
SELECTION-SCREEN: BEGIN OF BLOCK blk1 WITH FRAME TITLE aaa.
SELECT-OPTIONS:   s_carrid FOR v_carrid.
SELECTION-SCREEN: END   OF BLOCK blk1.
*
** Initialization
INITIALIZATION.
  aaa = 'Selection Criteria'.
 
*
** Start of Selection
START-OF-SELECTION.
* object for the report
  CREATE OBJECT o_report.
 
* Get data
  o_report->r_carrid = s_carrid[].
  o_report->get_data( ).
 
* generate output
  o_report->write_list( ).
  o_report->generate_alv( ).
 
*----------------------------------------------------------------------*
* Local Class Implementation
*----------------------------------------------------------------------*
CLASS lcl_report IMPLEMENTATION.
*
  METHOD get_data.
*   data selection
    SELECT * FROM sflight
           INTO  TABLE me->t_data
           WHERE carrid IN s_carrid.
 
  ENDMETHOD.                    "get_data
*
  METHOD write_list.
 
    WRITE: / 'This list is generated using the Good Old fashioned WRITE'.
    WRITE: / ' --- Total number of records', LINES( t_data ).
 
  ENDMETHOD.
*
  METHOD generate_alv.
*   local data
    DATA: lo_dock TYPE REF TO cl_gui_docking_container,
          lo_cont TYPE REF TO cl_gui_container,
          lo_alv  TYPE REF TO cl_salv_table.
 
    DATA: lv_repid TYPE sy-repid,
          lv_dynnr TYPE sy-dynnr.
 
    lv_repid = 'SAPMSSY0'.
    lv_dynnr = '0120'.
 
*
*   Create a docking control at bottom
    CHECK lo_dock IS INITIAL.
    CREATE OBJECT lo_dock
      EXPORTING
        repid = lv_repid
        dynnr = lv_dynnr
        ratio = 80
        side  = cl_gui_docking_container=>dock_at_bottom
        NAME  = 'DOCK_CONT'.
    IF sy-subrc <> 0.
      MESSAGE 'Error in the Docking control' TYPE 'S'.
    ENDIF.
*
*   Create a SALV for output
    CHECK lo_alv IS INITIAL.
    TRY.
*       Narrow Casting: To initialize custom container from
*       docking container
        lo_cont ?= lo_dock.
*
*       SALV Table Display on the Docking container
        CALL METHOD cl_salv_table=>factory
          EXPORTING
            list_display   = if_salv_c_bool_sap=>false
            r_container    = lo_cont
            container_name = 'DOCK_CONT'
          IMPORTING
            r_salv_table   = lo_alv
          CHANGING
            t_table        = me->t_data.
      CATCH cx_salv_msg .
    ENDTRY.
*
*   Pf status
    DATA: lo_functions TYPE REF TO cl_salv_functions_list.
    lo_functions = lo_alv->get_functions( ).
    lo_functions->set_default( abap_true ).
*
*   output display
    lo_alv->display( ).
*
  ENDMETHOD.                    "generate_ALV
*
ENDCLASS.                    "lcl_report IMPLEMENTATION