*&---------------------------------------------------------------------*
*& Report ZDEMO_ALVGRID_EDIT *
*& *
*&---------------------------------------------------------------------*
*& *
*& Example of a simple ALV Grid Report *
*& ................................... *
*& *
*& The basic ALV grid, Enhanced to display specific fields as *
*& editable depending on field value *
*&---------------------------------------------------------------------*
REPORT ZDEMO_ALVGRID_EDIT .
TABLES: ekko.
TYPE-POOLS: slis. "ALV Declarations
*Data Declaration
*----------------
TYPES: BEGIN OF t_ekko,
ebeln TYPE ekpo-ebeln,
ebelp TYPE ekpo-ebelp,
statu TYPE ekpo-statu,
aedat TYPE ekpo-aedat,
matnr TYPE ekpo-matnr,
menge TYPE ekpo-menge,
meins TYPE ekpo-meins,
netpr TYPE ekpo-netpr,
peinh TYPE ekpo-peinh,
field_style TYPE lvc_t_styl, "FOR DISABLE
END OF t_ekko.
DATA: it_ekko TYPE STANDARD TABLE OF t_ekko INITIAL SIZE 0,
wa_ekko TYPE t_ekko.
*ALV data declarations
DATA: fieldcatalog TYPE slis_t_fieldcat_alv WITH HEADER LINE.
DATA: it_fieldcat TYPE lvc_t_fcat, "slis_t_fieldcat_alv WITH HEADER LINE,
wa_fieldcat TYPE lvc_s_fcat,
gd_tab_group TYPE slis_t_sp_group_alv,
gd_layout TYPE lvc_s_layo, "slis_layout_alv,
gd_repid LIKE sy-repid.
************************************************************************
*Start-of-selection.
START-OF-SELECTION.
PERFORM data_retrieval.
PERFORM set_specific_field_attributes.
PERFORM build_fieldcatalog.
PERFORM build_layout.
PERFORM display_alv_report.
*&---------------------------------------------------------------------*
*& Form BUILD_FIELDCATALOG
*&---------------------------------------------------------------------*
* Build Fieldcatalog for ALV Report
*----------------------------------------------------------------------*
FORM build_fieldcatalog.
wa_fieldcat-fieldname = 'EBELN'.
wa_fieldcat-scrtext_m = 'Purchase Order'.
wa_fieldcat-col_pos = 0.
wa_fieldcat-outputlen = 10.
wa_fieldcat-emphasize = 'X'.
wa_fieldcat-key = 'X'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'EBELP'.
wa_fieldcat-scrtext_m = 'PO Item'.
wa_fieldcat-col_pos = 1.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'STATU'.
wa_fieldcat-scrtext_m = 'Status'.
wa_fieldcat-col_pos = 2.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'AEDAT'.
wa_fieldcat-scrtext_m = 'Item change date'.
wa_fieldcat-col_pos = 3.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'MATNR'.
wa_fieldcat-scrtext_m = 'Material Number'.
wa_fieldcat-col_pos = 4.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'MENGE'.
wa_fieldcat-scrtext_m = 'PO quantity'.
wa_fieldcat-col_pos = 5.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'MEINS'.
wa_fieldcat-scrtext_m = 'Order Unit'.
wa_fieldcat-col_pos = 6.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'NETPR'.
wa_fieldcat-scrtext_m = 'Net Price'.
*设置单价字段可编辑
wa_fieldcat-edit = 'X'.
wa_fieldcat-col_pos = 7.
wa_fieldcat-outputlen = 15.
wa_fieldcat-datatype = 'CURR'.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
wa_fieldcat-fieldname = 'PEINH'.
wa_fieldcat-scrtext_m = 'Price Unit'.
wa_fieldcat-col_pos = 8.
APPEND wa_fieldcat TO it_fieldcat.
CLEAR wa_fieldcat.
ENDFORM. " BUILD_FIELDCATALOG
*&---------------------------------------------------------------------*
*& Form BUILD_LAYOUT
*&---------------------------------------------------------------------*
* Build layout for ALV grid report
*----------------------------------------------------------------------*
FORM build_layout.
* Set layout field for field attributes(i.e. input/output)
gd_layout-stylefname = 'FIELD_STYLE'.
gd_layout-zebra = 'X'.
ENDFORM. " BUILD_LAYOUT
*&---------------------------------------------------------------------*
*& Form DISPLAY_ALV_REPORT
*&---------------------------------------------------------------------*
* Display report using ALV grid
*----------------------------------------------------------------------*
FORM display_alv_report.
gd_repid = sy-repid.
* call function 'REUSE_ALV_GRID_DISPLAY'
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY_LVC'
EXPORTING
i_callback_program = gd_repid
* i_callback_user_command = 'USER_COMMAND'
is_layout_lvc = gd_layout
it_fieldcat_lvc = it_fieldcat
i_save = 'X'
TABLES
t_outtab = it_ekko
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.
ENDFORM. " DISPLAY_ALV_REPORT
*&---------------------------------------------------------------------*
*& Form DATA_RETRIEVAL
*&---------------------------------------------------------------------*
* Retrieve data form EKPO table and populate itab it_ekko
*----------------------------------------------------------------------*
FORM data_retrieval.
SELECT ebeln ebelp statu aedat matnr menge meins netpr peinh
UP TO 10 ROWS
FROM ekpo
INTO CORRESPONDING FIELDS OF TABLE it_ekko.
ENDFORM. " DATA_RETRIEVAL
*&---------------------------------------------------------------------*
*&根据条件设置字段是否可编辑
*&---------------------------------------------------------------------*
* populate FIELD_STYLE table with specific field attributes
*----------------------------------------------------------------------*
form set_specific_field_attributes .
DATA ls_stylerow TYPE lvc_s_styl .
DATA lt_styletab TYPE lvc_t_styl .
* Populate style variable (FIELD_STYLE) with style properties
* The NETPR field/column has been set to editable in the fieldcatalog...
* The following code sets it to be disabled(display only) if 'NETPR'
* is gt than 10.
LOOP AT it_ekko INTO wa_ekko.
IF wa_ekko-netpr GT 10.
ls_stylerow-fieldname = 'NETPR' .
ls_stylerow-style = cl_gui_alv_grid=>mc_style_disabled.
"set field to disabled
APPEND ls_stylerow TO wa_ekko-field_style.
*可以按上面的代码添加多个字段的是否可修改
MODIFY it_ekko FROM wa_ekko.
ENDIF.
ENDLOOP.
endform. " set_specific_field_attributes
来源：https://www.cnblogs.com/xiaomaohai/archive/2007/11/02/6157142.html