ALV下拉框
如圖在ALV下拉框內做了1到5 的選擇下拉框，下面一起來看下如何實施
1.在GT_DATA中增加一個字段來用於下拉框的使用：
| TYPES:BEGIN OF ty_data,
checkbox TYPE c,
matnr TYPE mara-matnr,
mtart TYPE mara-mtart,
matkl TYPE mara-matkl,
maktx TYPE makt-maktx,
context TYPE char10,"用於下拉框
END OF ty_data.
DATA gt_data TYPE TABLE OF ty_data WITH EMPTY KEY. |
2.設置fieldcat屬性：
設置context字段可輸入，設置fieldcat-drdn_hndl = ‘1’.
(這個1是下面下拉框對應的組，可以用2 3 4 5 6··· 來標記下拉框的組，以此來實現多個下拉框)
| FORM frm_set_fieldcat.
DATA lv_pos TYPE i.
DATA ls_fieldcat LIKE LINE OF gt_fieldcat.
DEFINE %%append_fieldcat.
lv_pos = lv_pos + 1.
ls_fieldcat-col_pos = lv_pos.
ls_fieldcat-fieldname = &1."字段名
ls_fieldcat-coltext = &2."文本
* ls_fieldcat-no_zero = &3."去掉前導零
ls_fieldcat-ref_table = &3.
ls_fieldcat-ref_field = &4.
APPEND ls_fieldcat TO gt_fieldcat.
CLEAR ls_fieldcat.
END-OF-DEFINITION.
%%append_fieldcat:
'CHECKBOX' '選擇' '' '',
'MATNR' '' 'MARA' 'MATNR',
'MTART' '' 'MARA' 'MTART',
'MATKL' '' 'MARA' 'MATKL',
'MAKTX' '' 'MAKT' 'MAKTX',
'CONTEXT' '下拉輸入1' '' ''.
READ TABLE gt_fieldcat ASSIGNING FIELD-SYMBOL(<fs1>) WITH KEY fieldname = 'CONTEXT'.
IF sy-subrc EQ 0.
<fs1>-edit = 'X'.
<fs1>-drdn_hndl = '1'.“分組標識
ENDIF. |
3.設置下拉框內容
如下圖，set_drop_down_table()方法需要在 set_table_for_first_display()方法之前調用，否則下拉框沒有下拉值。
Handle = 1 就是給下拉框分組
| "ALV 下拉框
DATA:ls_drop_down TYPE lvc_s_drop,
lt_drop_down TYPE lvc_t_drop.
"句柄HANDLE 為I類型，相同數字為同一組下拉框
DO 5 TIMES.
CLEAR ls_drop_down.
ls_drop_down-handle = '1'.“對應分組標識
ls_drop_down-value = sy-index.
APPEND ls_drop_down TO lt_drop_down.
ENDDO. |
| "ALV 下拉框
cr_grid->set_drop_down_table(
it_drop_down = lt_drop_down
). CALL METHOD cr_grid->set_table_for_first_display
EXPORTING
is_variant = ls_disvariant
i_default = 'X'
i_save = 'U'
is_layout = ls_layout
it_toolbar_excluding = lt_exclude
CHANGING
it_outtab = ct_data
it_fieldcatalog = ct_fieldcat. |
4.有多個下拉框分組的時候效果：
這樣應該理解了handle = 1 / 2 時分組的概念了。
