創建步驟：
- 先定义动态结构體，然後用系統標準的方法：cl_alv_table_create=>create_dynamic_table，生成動態內表
- 赋值。遍歷动态结构，获取指定的字段，然后给指定的字段赋值。
- 顯示。遍歷动态结构，获取指定的字段，然后读取对应字段的值。
TABLES: ekbe.
SELECT-OPTIONS: ebeln FOR ekbe-ebeln NO INTERVALS,
matnr FOR ekbe-matnr NO INTERVALS,
bwart FOR ekbe-bwart NO INTERVALS.
DATA tdate LIKE TABLE OF sy-datum WITH HEADER LINE.
DATA: BEGIN OF itab OCCURS 0,
dmbtr like ekbe-dmbtr,
waers like ekbe-waers,
menge LIKE ekbe-menge,
belnr like ekbe-belnr,
budat LIKE ekbe-budat,
END OF itab.
DATA: dy_table TYPE REF TO data,
dy_wa TYPE REF TO data,
it_strtab TYPE lvc_t_fcat,
wa_str TYPE lvc_s_fcat.
data fieldname(20).
DATA: gt_fieldcat TYPE lvc_t_fcat,
gs_fieldcat TYPE lvc_s_fcat.
DEFINE: add_field.
gs_fieldcat-fieldname = &1.
gs_fieldcat-coltext = &2.
append gs_fieldcat to gt_fieldcat.
END-OF-DEFINITION.
SELECT dmbtr
waers
belnr
menge
budat FROM ekbe
INTO CORRESPONDING FIELDS OF TABLE itab
WHERE ebeln IN ebeln
AND matnr IN matnr
AND bwart IN bwart.
SORT itab BY budat.
LOOP AT itab.
tdate = itab-budat.
COLLECT tdate.
ENDLOOP.
FIELD-SYMBOLS: <dy_table> TYPE table,
<dyn_wa> TYPE ANY,
<fs> TYPE ANY.
wa_str-fieldname = 'BELNR'.
wa_str-col_pos = 1.
APPEND wa_str TO it_strtab.
PERFORM input_fieldcat USING 'BELNR' 'BELNR'.
CLEAR: wa_str.
wa_str-fieldname = 'DMBTR'.
wa_str-col_pos = 2.
APPEND wa_str TO it_strtab.
CLEAR: wa_str.
PERFORM input_fieldcat USING 'DMBTR' 'DMBTR'.
wa_str-fieldname = 'WAERS'.
wa_str-col_pos = 3.
APPEND wa_str TO it_strtab.
CLEAR: wa_str.
PERFORM input_fieldcat USING 'WAERS' 'WAERS'.
LOOP AT tdate.
wa_str-fieldname = tdate.
wa_str-col_pos = 1.
APPEND wa_str TO it_strtab.
CLEAR wa_str.
PERFORM input_fieldcat USING tdate tdate.
ENDLOOP.
CALL METHOD cl_alv_table_create=>create_dynamic_table//生成動態內表
EXPORTING
it_fieldcatalog = it_strtab
IMPORTING
EP_TABLE = dy_table
EXCEPTIONS
GENERATE_SUBPOOL_DIR_FULL = 1
others = 2 .
assign dy_table->* to <dy_table>.
create data dy_wa like line of <dy_table>.
assign dy_wa->* to <dyn_wa>.
loop at itab.
assign component 'BELNR' of structure <dyn_wa> to <fs>.
<fs> = itab-belnr.//指定字段賦指定字段的值
assign component 'DMBTR' of structure <dyn_wa> to <fs>.
<fs> = itab-dmbtr.
assign component 'WAERS' of structure <dyn_wa> to <fs>.
<fs> = itab-waers.
fieldname = itab-budat.
assign component fieldname of structure <dyn_wa> to <fs>.
<fs> = itab-menge.
at end of belnr.
append <dyn_wa> to <dy_table>.
clear: <dyn_wa>.
endat.
endloop.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC'
EXPORTING
I_CALLBACK_PROGRAM = sy-repid
IT_FIELDCAT_LVC = gt_fieldcat
TABLES
t_outtab = <dy_table>
EXCEPTIONS
PROGRAM_ERROR = 1
OTHERS = 2 .
*---------------------------------------------------------------------*
* FORM input_fieldcat *
*---------------------------------------------------------------------*
* ........ *
*---------------------------------------------------------------------*
* --> P_TDATE1 *
* --> P_TDATE2 *
*---------------------------------------------------------------------*
FORM input_fieldcat USING p_tdate1
p_tdate2.
add_field p_tdate1 p_tdate2.
ENDFORM.
REPORT ztest_work6 .
TYPE-POOLS:slis.
DATA: dyntab LIKE dntab OCCURS 0 WITH HEADER LINE,
gt_fcat TYPE lvc_t_fcat,
gs_fcat TYPE lvc_s_fcat,
gt_fieldcat TYPE slis_t_fieldcat_alv,
gs_fieldcat TYPE slis_fieldcat_alv,
dref TYPE REF TO data.
FIELD-SYMBOLS:<rec_tab> TYPE STANDARD TABLE.
PARAMETERS : p_table LIKE dd02l-tabname,
hits LIKE rseumod-tbmaxsel.
CALL FUNCTION 'NAMETAB_GET'
EXPORTING
langu = sy-langu
tabname = p_table
TABLES
nametab = dyntab
EXCEPTIONS
internal_error = 1
table_has_no_fields = 2
table_not_activ = 3
no_texts_found = 4
OTHERS = 5.
LOOP AT dyntab.
gs_fcat-fieldname = dyntab-fieldname.
gs_fcat-ref_field = dyntab-fieldname.
gs_fcat-ref_table = dyntab-tabname.
APPEND gs_fcat TO gt_fcat.
gs_fieldcat-fieldname = dyntab-fieldname.
gs_fieldcat-ref_tabname = dyntab-tabname.
APPEND gs_fieldcat TO gt_fieldcat.
ENDLOOP.
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = gt_fcat
IMPORTING
ep_table = dref.
ASSIGN dref->* TO <rec_tab>.
SELECT * FROM (dyntab-tabname)
INTO CORRESPONDING FIELDS OF TABLE <rec_tab> UP TO hits ROWS.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
EXPORTING
it_fieldcat = gt_fieldcat
TABLES
t_outtab = <rec_tab>
EXCEPTIONS
program_error = 1
OTHERS = 2.
