data_changed在可編輯字段的數據發生變化時才會觸發。可用來檢查輸入數據的正確性。
data_changed_finished在回車時和可編輯字段數據發生變化后，光標移動時觸發，如果可編輯字段數據檢查失敗，則不會觸發此事件。
這兩個事件都需要調用方法才能觸發。
call METHOD g_grid01->register_edit_event
EXPORTING
i_event_id = cl_gui_alv_grid=>mc_evt_enter.//回車觸發事件
call METHOD g_grid01->register_edit_event
EXPORTING
i_event_id = cl_gui_alv_grid=>mc_evt_modified.//修改觸發事件
下面是個完整例子，屏幕就只有一個customer control：
REPORT Z_TALV.
data: gv_repid TYPE sy-repid,
gv_sname TYPE sy-dynnr.
DATA: gs_data TYPE spfli.
DATA: gt_data LIKE TABLE OF gs_data.
DATA: g_con01 TYPE REF TO cl_gui_custom_container.
DATA: g_grid01 TYPE REF TO cl_gui_alv_grid.
DATA: gs_fieldcat TYPE lvc_s_fcat.
DATA: gt_fieldcat TYPE lvc_t_fcat.
data: ok_code type sy-ucomm,
save_ok type sy-ucomm.
CONSTANTS: g_cus01 TYPE scrfname VALUE 'CUS01'.
*----------------------------------------------------------------------*
* CLASS cl_event_receiver DEFINITION
*----------------------------------------------------------------------*
*
*----------------------------------------------------------------------*
CLASS cl_event_receiver DEFINITION.
PUBLIC SECTION.
" 声明Toolbar事件方法
METHODS handle_toolbar
FOR EVENT toolbar OF cl_gui_alv_grid
IMPORTING e_object e_interactive.
METHODS handle_data_changed
for EVENT data_changed of cl_gui_alv_grid
IMPORTING
er_data_changed
e_onf4
e_onf4_before
e_onf4_after
e_ucomm.
METHODs handle_data_changed_finished
for EVENT data_changed_finished of cl_gui_alv_grid
IMPORTING
e_modified
et_good_cells.
ENDCLASS. "cl_event_receiver DEFINITION
*----------------------------------------------------------------------*
* CLASS cl_event_receiver IMPLEMENTATION
*----------------------------------------------------------------------*
*
*----------------------------------------------------------------------*
CLASS cl_event_receiver IMPLEMENTATION.
" 实现Toolbar事件方法
METHOD handle_toolbar.
DATA: ls_toolbar TYPE stb_button.
CLEAR: ls_toolbar.
ls_toolbar-butn_type = 3. " 分隔符
APPEND ls_toolbar TO e_object->mt_toolbar.
CLEAR: ls_toolbar.
ls_toolbar-function = 'RESH'. " 功能码
ls_toolbar-icon = icon_REFRESH. " 图标名称
ls_toolbar-quickinfo = 'Refresh'. " 图标的提示信息
ls_toolbar-disabled = ''. " X表示灰色，不可用
ls_toolbar-text = ''. " 按钮上显示的文本
APPEND ls_toolbar TO e_object->mt_toolbar.
ENDMETHOD. "handle_toolbar
METHOD handle_data_changed.
PERFORM handle_data_changed using er_data_changed.
ENDMETHOD.
METHOD handle_data_changed_finished.
MESSAGE 'it is work' TYPE 'I'.
ENDMETHOD.
ENDCLASS. "cl_event_receiver IMPLEMENTATION
DATA: event_receiver TYPE REF TO cl_event_receiver.
START-OF-SELECTION.
PERFORM get_data.
CALL SCREEN 100.
*&---------------------------------------------------------------------*
*& Form GET_DATA
*&---------------------------------------------------------------------*
* text 获取数据
*----------------------------------------------------------------------*
FORM get_data.
SELECT *
INTO CORRESPONDING FIELDS OF TABLE gt_data
UP TO 30 ROWS
FROM spfli.
ENDFORM. "GET_DATA
*&---------------------------------------------------------------------*
*& Form SET_FIELDCAT
*&---------------------------------------------------------------------*
* text ALV显示字段文本
*----------------------------------------------------------------------*
FORM set_fieldcat.
CLEAR: gt_fieldcat[].
DEFINE macro_fieldcat.
clear gs_fieldcat.
gs_fieldcat-fieldname = &1.
gs_fieldcat-coltext = &2.
gs_fieldcat-hotspot = &3.
append gs_fieldcat to gt_fieldcat.
END-OF-DEFINITION.
macro_fieldcat 'CARRID' '航线代码' 'X'.
macro_fieldcat 'CONNID' '航班连接Id' ''.
macro_fieldcat 'COUNTRYFR' '起飞国家' ''.
macro_fieldcat 'CITYFROM' '起飞城市' ''.
macro_fieldcat 'AIRPFROM' '起飞机场' ''.
macro_fieldcat 'COUNTRYTO' '目标国家' ''.
macro_fieldcat 'CITYTO' '目标城市' ''.
macro_fieldcat 'AIRPTO' '目标机场' ''.
macro_fieldcat 'FLTIME' '航班时间' ''.
macro_fieldcat 'DEPTIME' '启程时间' ''.
macro_fieldcat 'ARRTIME' '到达时间' ''.
macro_fieldcat 'DISTANCE' '距离' ''.
ENDFORM. "SET_FIELDCAT
*&---------------------------------------------------------------------*
*& Form SET_LAYOUT
*&---------------------------------------------------------------------*
* text 布局
*----------------------------------------------------------------------*
* -->P_LAYOUT text
*----------------------------------------------------------------------*
FORM set_layout CHANGING p_layout TYPE lvc_s_layo.
p_layout-cwidth_opt = 'X'. " 自动调节字段长度
p_layout-sel_mode = 'D'. " 选择模式，可选择多行
p_layout-zebra = 'X'. " 颜色交替显示
p_layout-edit = 'X'.
ENDFORM. "SET_LAYOUT
*&---------------------------------------------------------------------*
*& Module INIT_CON OUTPUT
*&---------------------------------------------------------------------*
* text 创建ALV
*----------------------------------------------------------------------*
MODULE init_con OUTPUT.
DATA: ls_layout TYPE lvc_s_layo.
IF g_con01 IS INITIAL.
PERFORM set_fieldcat.
PERFORM set_layout CHANGING ls_layout.
" 创建SAP容器实例
CREATE OBJECT g_con01
EXPORTING
container_name = g_cus01 " 自定义控件名称
EXCEPTIONS
cntl_error = 1
cntl_system_error = 2
create_error = 3
lifetime_error = 4
lifetime_dynpro_dynpro_link = 5
OTHERS = 6.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
" 创建GRID实例
CREATE OBJECT g_grid01
EXPORTING
i_parent = g_con01
EXCEPTIONS
error_cntl_create = 1
error_cntl_init = 2
error_cntl_link = 3
error_dp_create = 4
OTHERS = 5.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.
CREATE OBJECT event_receiver.
" 注册事件handler方法
SET HANDLER event_receiver->handle_toolbar FOR g_grid01.
set HANDLER event_receiver->handle_data_changed for g_grid01.
set HANDLER event_receiver->handle_data_changed_finished FOR g_grid01.
call METHOD g_grid01->register_edit_event
EXPORTING
i_event_id = cl_gui_alv_grid=>mc_evt_enter."回車觸發事件
call METHOD g_grid01->register_edit_event
EXPORTING
i_event_id = cl_gui_alv_grid=>mc_evt_modified."修改完成后光標移動觸發事件，但修改完后，data_changed檢查輸入錯誤，就不會走這個事件
" 调用ALV 显示方法
CALL METHOD g_grid01->set_table_for_first_display
EXPORTING
* i_structure_name = 'SPFLI' " 参照表结构字段显示
is_layout = ls_layout " 布局
CHANGING
it_fieldcatalog = gt_fieldcat " 显示字段
it_outtab = gt_data[]
EXCEPTIONS
invalid_parameter_combination = 1
program_error = 2
too_many_lines = 3
OTHERS = 4.
IF sy-subrc <> 0.
* Implement suitable error handling here
ENDIF.
ENDIF.
ENDMODULE. " INIT_CON OUTPUT
*&---------------------------------------------------------------------*
*& Module STATUS_0100 OUTPUT
*&---------------------------------------------------------------------*
*----------------------------------------------------------------------*
MODULE status_0100 OUTPUT.
SET PF-STATUS 'S0001'.
IF gv_repid is INITIAL.
gv_repid = 'Z_TALV'.
gv_sname = '0101'.
ENDIF.
ENDMODULE. " STATUS_0100 OUTPUT
*&---------------------------------------------------------------------*
*& Module USER_EXIT_0100 INPUT
*&---------------------------------------------------------------------*
*----------------------------------------------------------------------*
MODULE user_exit_0100 INPUT.
save_ok = ok_code.
clear ok_code.
case save_ok.
when 'BACK'.
leave program.
when 'BTN'.
MESSAGE 'btn' TYPE 'I'.
endcase.
ENDMODULE. " USER_EXIT_0100 INPUT
form handle_data_changed using
p_er_data_changed TYPE ref to cl_alv_changed_data_protocol.
data: mod_data TYPE lvc_t_modi,
wa_mod_data TYPE lvc_s_modi.
mod_data = p_er_data_changed->mt_mod_cells.
LOOP AT mod_data INTO wa_mod_data WHERE fieldname = 'CONNID'.
IF strlen( wa_mod_data-value ) > 4.
call METHOD p_er_data_changed->add_protocol_entry
EXPORTING
i_msgid = '00'
i_msgty = 'E'
i_msgno = '001'
i_msgv1 = 'length is too long'
i_fieldname = wa_mod_data-fieldname.
ENDIF.
ENDLOOP.
ENDFORM.
