ALV issue - capturing user changes in editable fields using custom button?

Hi,
I created a custom button in ALV tool bar.   And also in my ALV grid I have couple of fields Editable option. User can change values for these 2 fields.
My question is -
After changing values for these editable fields(more than 1 record) , user will click on custom button and then I have to update all the user changed values in to my internal table(lt_tab) and then I have to process logic.
Problem is when user click on Custom button in ALV tool bar it is not having the changed values in lt_tab table.
Only when user clicks some thing on ALV grid records or fields then it is getting all the changed values in to lt_tab.
Can any one tell me how I can get changed values when user clicks on custom button?
1. Can we place custom button in ALV Grid? instead of ALV tool bar?
or
How I can capture user changes when they click on custom button?
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
TABLES
      T_OUTTAB                          = lt_tab
Please check this logic-
CASE r_ucomm.
    WHEN '&IC1'.
- It_tab having all changed field values
WHEN 'custom button'.
      lt_tab - not having any changed values - showing all initial lt_tab values.
I highly appreciate your answers on this.
Thanks.
Rajesh.

Hi,
Use this code, its working:-
*&      Form ALV_DISPLAY
*       SUB-ROUTINE ALV_DISPLAY IS USED TO SET THE PARAMETERS
*       FOR THE FUNCTION MODULE REUSE_ALV_GRID_DISPLAY
*       AND PASS THE INTERNAL TABLE EXISTING THE RECORDS TO BE
*       DISPLAYED IN THE GRID FORMAT
FORM alv_display .
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
   EXPORTING
*     I_INTERFACE_CHECK                 = ' '
*     I_BYPASSING_BUFFER                = ' '
*     I_BUFFER_ACTIVE                   = ' '
     i_callback_program                = v_rep_id       " report id
     i_callback_pf_status_set          = 'PF'           " for PF-STATUS
     i_callback_user_command           = 'USER_COMMAND' " for User-Command
*     I_CALLBACK_TOP_OF_PAGE            = ' '
*     I_CALLBACK_HTML_TOP_OF_PAGE       = ' '
*     I_CALLBACK_HTML_END_OF_LIST       = ' '
*     I_STRUCTURE_NAME                  =
*     I_BACKGROUND_ID                   = ' '
*     I_GRID_TITLE                      =
*     I_GRID_SETTINGS                   =
     is_layout                         = wa_layout      " for layout
     it_fieldcat                       = it_field       " field catalog
*     IT_EXCLUDING                      =
*     IT_SPECIAL_GROUPS                 =
     it_sort                           = it_sort        " sort info
*     IT_FILTER                         =
*     IS_SEL_HIDE                       =
*     I_DEFAULT                         = 'X'
     i_save                            = 'A'
     is_variant                        = wa_variant     " variant name
*     IT_EVENTS                         =
*     IT_EVENT_EXIT                     =
*     IS_PRINT                          =
*     IS_REPREP_ID                      =
*     I_SCREEN_START_COLUMN             = 0
*     I_SCREEN_START_LINE               = 0
*     I_SCREEN_END_COLUMN               = 0
*     I_SCREEN_END_LINE                 = 0
*     I_HTML_HEIGHT_TOP                 = 0
*     I_HTML_HEIGHT_END                 = 0
*     IT_ALV_GRAPHICS                   =
*     IT_HYPERLINK                      =
*     IT_ADD_FIELDCAT                   =
*     IT_EXCEPT_QINFO                   =
*     IR_SALV_FULLSCREEN_ADAPTER        =
*   IMPORTING
*     E_EXIT_CAUSED_BY_CALLER           =
*     ES_EXIT_CAUSED_BY_USER            =
    TABLES
      t_outtab                          = it_final      " internal table
   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.                    " ALV_DISPLAY
*&      Form USER_COMMAND
*       SUB-ROUTINE USER_COMMAND IS USED TO HANDLE THE USER ACTION
*       AND EXECUTE THE APPROPIATE CODE
*      -->LV_OKCODE   used to capture the function code
*                     of the user-defined push-buttons
*      -->L_SELFIELD   text
FORM user_command USING lv_okcode LIKE sy-ucomm l_selfield TYPE slis_selfield.
* assign the function code to variable v_okcode
lv_okcode = sy-ucomm.
* handle the code execution based on the function code encountered
CASE lv_okcode.
* when the function code is EXECUTE then process the selected records
    WHEN 'EXECUTE'. "user-defined button
* to reflect the data changed into internal table
      DATA : ref_grid TYPE REF TO cl_gui_alv_grid. "new
      IF ref_grid IS INITIAL.
        CALL FUNCTION 'GET_GLOBALS_FROM_SLVC_FULLSCR'
          IMPORTING
            e_grid = ref_grid.
      ENDIF.
      IF NOT ref_grid IS INITIAL.
        CALL METHOD ref_grid->check_changed_data.
      ENDIF.
* refresh the ALV Grid output from internal table
      l_selfield-refresh = c_check.
ENDCASE.
ENDFORM.
This will reflect all the changes in the internal table. Now you can include your logic as per your requirement.
Hope this solves your problem.
Thanks & Regards,
Tarun Gambhir

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