ALV 动态显示列Demo

*-------------ALV 相关--------------------------

DATA: wa_layo TYPE lvc_s_layo.

DATA: wa_fcat TYPE lvc_s_fcat,

      it_fcat TYPE lvc_t_fcat.

 

DATA  it_scol TYPE lvc_t_scol.

 

DATA: g_grid TYPE REF TO cl_gui_alv_grid.

 

FIELD-SYMBOLS: < dyn_table > TYPE STANDARD TABLE,

               < dyn_wa >,

               < dyn_field >.

 

DATA: dy_table TYPE REF TO data,

      dy_line  TYPE REF TO data.

 

DATA: colname(10),

      index(2).

 

* 列数

PARAMETERS: col TYPE i.

 

CLEAR: it_fcat.

 

* 根据条件动态生成列

DO col TIMES.

  index = index + 1.

  CONCATENATE 'COL' index INTO colname.

  PERFORM frm_add_fcat USING:

         colname 'C' '描述' '100'.

ENDDO.

 

* 根据it_fact生成动态表

CALL METHOD cl_alv_table_create=>create_dynamic_table

  EXPORTING

    it_fieldcatalog = it_fcat

  IMPORTING

    ep_table        = dy_table.

 

ASSIGN dy_table->* TO < dyn_table >.

 

CREATE DATA dy_line LIKE LINE OF < dyn_table >.

 

ASSIGN dy_line->* TO < dyn_wa >.

 

* 给表字段赋值

CLEAR: index.

DO col TIMES.

  index = index + 1.

  CONCATENATE 'COL' index INTO colname.

  ASSIGN COMPONENT colname OF STRUCTURE < dyn_wa>  TO < dyn_field >.

  < dyn_field > = '列数据'.

ENDDO.

APPEND < dyn_wa > TO < dyn_table >.

 

* 相当于给内表放入两条数据

CLEAR: index.

DO col TIMES.

  index = index + 1.

  CONCATENATE 'COL' index INTO colname.

  ASSIGN COMPONENT colname OF STRUCTURE < dyn_wa > TO < dyn_field >.

  < dyn_field > = '列数据'.

ENDDO.

APPEND < dyn_wa > TO < dyn_table >.

 

CLEAR: wa_layo.

wa_layo-zebra = 'X'.

wa_layo-cwidth_opt = 'X'.

 

CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC'

  EXPORTING

    i_callback_program = sy-repid

    is_layout_lvc      = wa_layo

    it_fieldcat_lvc    = it_fcat

  TABLES

    t_outtab           = < dyn_table >

  EXCEPTIONS

    program_error      = 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.

 

*&---------------------------------------------------------------------*

*&      Form  frm_add_fcat

*&---------------------------------------------------------------------*

*       text

*----------------------------------------------------------------------*

*      -->VALUE1     text

*      -->VALUE2     text

*      -->VALUE3     text

*      -->VALUE4     text

*----------------------------------------------------------------------*

FORM frm_add_fcat USING value1 value2 value3 value4.

  wa_fcat-fieldname = value1.

  wa_fcat-inttype = value2.

  wa_fcat-reptext = value3.

  wa_fcat-intlen   = value4.

  APPEND wa_fcat TO it_fcat.

  CLEAR: wa_fcat.

ENDFORM.                    "frm_add_fcat