具有edit和save to db功能的ALV

*&---------------------------------------------------------------------*
*& Report  Z_DEMO_ALV_JG
*&
*&---------------------------------------------------------------------*
*&
*&
*&---------------------------------------------------------------------*

REPORT  Z_DEMO_ALV_JG.
******************************************************************\*
* TYPE-POOLS *
******************************************************************\*
TYPE-POOLS: slis.
******************************************************************\*
* INTERNAL TABLES/WORK AREAS/VARIABLES *
******************************************************************\*
DATA: i_fieldcat TYPE slis_t_fieldcat_alv,
i_index TYPE STANDARD TABLE OF i WITH HEADER LINE,
w_field TYPE slis_fieldcat_alv,
p_table LIKE dd02l-tabname,
dy_table TYPE REF TO data,
dy_tab TYPE REF TO data,
dy_line TYPE REF TO data.
******************************************************************\*
* FIELD-SYMBOLS *
******************************************************************\*
FIELD-SYMBOLS: <dyn_table> TYPE STANDARD TABLE,
<dyn_wa> TYPE ANY,
<dyn_field> TYPE ANY,
<dyn_tab_temp> TYPE STANDARD TABLE.
******************************************************************\*
* SELECTION SCREEN *
******************************************************************\*
PARAMETERS: tabname(30) TYPE c,
lines(5) TYPE n.
******************************************************************\*
* START-OF-SELECTION *
******************************************************************\*
START-OF-SELECTION.
* Storing table name
p_table = tabname.
* Create internal table dynamically with the stucture of table name
* entered in the selection screen
CREATE DATA dy_table TYPE STANDARD TABLE OF (p_table).
ASSIGN dy_table->* TO <dyn_table>.
IF sy-subrc <> 0.
MESSAGE i000(z_zzz_ca_messages) WITH ' No table found'.
LEAVE TO LIST-PROCESSING.
ENDIF.
* Create workarea for the table
CREATE DATA dy_line LIKE LINE OF <dyn_table>.
ASSIGN dy_line->* TO <dyn_wa>.
* Create another temp. table
CREATE DATA dy_tab TYPE STANDARD TABLE OF (p_table).
ASSIGN dy_tab->* TO <dyn_tab_temp>.
SORT i_fieldcat BY col_pos.
* Select data from table
SELECT * FROM (p_table)
INTO TABLE <dyn_table>
UP TO lines ROWS.
REFRESH <dyn_tab_temp>.
* Display report
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
EXPORTING
i_callback_program = sy-repid
i_structure_name = p_table
i_callback_user_command = 'USER_COMMAND'
i_callback_pf_status_set = 'SET_PF_STATUS'
TABLES
t_outtab = <dyn_table>
EXCEPTIONS
program_error = 1
OTHERS = 2.
IF sy-subrc <> 0.
ENDIF.
*&----------------------------------------------------------------\-*
*& Form SET_PF_STATUS
*&----------------------------------------------------------------\-*
* Setting custom PF-Status
*\-----------------------------------------------------------------\-*
* \-->RT_EXTAB Excluding table
*\-----------------------------------------------------------------\-*
FORM set_pf_status USING rt_extab TYPE slis_t_extab.
SET PF-STATUS 'Z_STANDARD'.
ENDFORM. "SET_PF_STATUS
*&---------------------------------------------------------------\-*
*& Form user_command
*&----------------------------------------------------------------\-*
* Handling custom function codes
*\-----------------------------------------------------------------\-*
* \-->R_UCOMM Function code value
* \-->RS_SELFIELD Info. of cursor position in ALV
*\-----------------------------------------------------------------\-*
FORM user_command USING r_ucomm LIKE sy-ucomm
rs_selfield TYPE slis_selfield.
* Local data declaration
DATA: li_tab TYPE REF TO data,
l_line TYPE REF TO data.
* Local field-symbols
FIELD-SYMBOLS:<l_tab> TYPE table,
<l_wa> TYPE ANY.
* Create table
CREATE DATA li_tab TYPE STANDARD TABLE OF (p_table).
ASSIGN li_tab->* TO <l_tab>.
* Create workarea
CREATE DATA l_line LIKE LINE OF <l_tab>.
ASSIGN l_line->* TO <l_wa>.
CASE r_ucomm.
* When a record is selected
WHEN '&IC1'.
* Read the selected record
READ TABLE <dyn_table> ASSIGNING <dyn_wa> INDEX
rs_selfield-tabindex.
IF sy-subrc = 0.
* Store the record in an internal table
APPEND <dyn_wa> TO <l_tab>.
* Fetch the field catalog info
CALL FUNCTION 'REUSE_ALV_FIELDCATALOG_MERGE'
EXPORTING
i_program_name = 'Z_DEMO_PDF_JG'
i_structure_name = p_table
CHANGING
ct_fieldcat = i_fieldcat
EXCEPTIONS
inconsistent_interface = 1
program_error = 2
OTHERS = 3.
IF sy-subrc = 0.
* Make all the fields input enabled except key fields
w_field-input = 'X'.
MODIFY i_fieldcat FROM w_field TRANSPORTING input
WHERE key IS INITIAL.
ENDIF.
* Display the record for editing purpose
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
EXPORTING
i_callback_program = sy-repid
i_structure_name = p_table
it_fieldcat = i_fieldcat
i_screen_start_column = 10
i_screen_start_line = 15
i_screen_end_column = 200
i_screen_end_line = 20
TABLES
t_outtab = <l_tab>
EXCEPTIONS
program_error = 1
OTHERS = 2.
IF sy-subrc = 0.
* Read the modified data
READ TABLE <l_tab> INDEX 1 INTO <l_wa>.
* If the record is changed then track its index no.
* and populate it in an internal table for future
* action
IF sy-subrc = 0 AND <dyn_wa> <> <l_wa>.
<dyn_wa> = <l_wa>.
i_index = rs_selfield-tabindex.
APPEND i_index.
ENDIF.
ENDIF.
ENDIF.
* When save button is pressed
WHEN 'SAVE'.
* Sort the index table
SORT i_index.
* Delete all duplicate records
DELETE ADJACENT DUPLICATES FROM i_index.
LOOP AT i_index.
* Find out the changes in the internal table
* and populate these changes in another internal table
READ TABLE <dyn_table> ASSIGNING <dyn_wa> INDEX i_index.
IF sy-subrc = 0.
APPEND <dyn_wa> TO <dyn_tab_temp>.
ENDIF.
ENDLOOP.
* Lock the table
CALL FUNCTION 'ENQUEUE_E_TABLE'
EXPORTING
mode_rstable = 'E'
tabname = p_table
EXCEPTIONS
foreign_lock = 1
system_failure = 2
OTHERS = 3.
IF sy-subrc = 0.
* Modify the database table with these changes
MODIFY (p_table) FROM TABLE <dyn_tab_temp>.
REFRESH <dyn_tab_temp>.
* Unlock the table
CALL FUNCTION 'DEQUEUE_E_TABLE'
EXPORTING
mode_rstable = 'E'
tabname = p_table.
ENDIF.
ENDCASE.
rs_selfield-refresh = 'X'.
ENDFORM. "user_command