Update ZTable from editable ALV

Hi All,
i'm calling a Function Module from within a Badi Class ( Workorder_Update) which uses an ALV to Add Comments in a Field of the ALV for Transportation to a ZTable. Therefore the ALV is set to editable.
The Problem is that if the User does not press 'enter' after she/he added the Comment, the value is not send back to the internal Table wich updates the ZTab. If the User presses 'enter' ONLY the Comment is transported but the remainder of the Fields are cleared.
This is part of the Coding:
Before Calling FM -->
+ IF wa_header_old-pronr NE wa_header-pronr.
        CLEAR wa_zthlog.
        wa_zthlog-uzeit     = sy-uzeit.
        wa_zthlog-aufnr     = wa_header-aufnr.
        wa_zthlog-objnr     = wa_header-objnr.
        wa_zthlog-vornr     = wa_operation-vornr.
        wa_zthlog-ktext     = wa_header-ktext.
        wa_zthlog-aenam     = sy-uname.
        wa_zthlog-aedat     = sy-datum.
        wa_zthlog-larnt     = wa_operation-larnt.
        wa_zthlog-pronr     = wa_header-pronr.
        wa_zthlog-arbei     = wa_operation-arbei.
        wa_zthlog-dauno     = wa_operation-dauno.
        wa_zthlog-dauno     = wa_operation-dauno.
        wa_zthlog-ltxa1     = wa_operation-ltxa1.
        wa_zthlog-arbid     = wa_operation-arbid.
        wa_zthlog-fieldname = 'PRONR'.
        wa_zthlog-matkl     = wa_operation-matkl.
        wa_zthlog-preis     = wa_operation-preis.
        wa_zthlog-waers     = wa_header-waers.
        wa_zthlog-old_value = wa_header_old-pronr.
        wa_zthlog-new_value = wa_header-pronr.
Fill t_zthlog - Call FM
        APPEND wa_zthlog TO t_zthlog.
      ENDIF.
    ENDLOOP.
Secure Values before change
    MOVE t_zthlog TO y_zthlog.+
Calling FM -->
+function z_thlog.
t_zthlog[] = c_zthlog[].
call screen 0100 starting at 10 3.
c_zthlog[] = t_zthlog[].
endfunction.+
ALV Grid - Processing -->
+module output_0100 output.
Fill Fieldcatalog
call function 'LVC_FIELDCATALOG_MERGE'
    exporting
      i_structure_name       = 'ZTHLOG'
    changing
      ct_fieldcat            = gt_fieldcat[]
    exceptions
      inconsistent_interface = 1
      program_error          = 2
      others                 = 3.
if g_custom_container is initial.
Prepare ALV
    create object g_custom_container
         exporting container_name = g_container.
    create object grid1
         exporting i_parent = g_custom_container.
    g_repid = sy-repid.
    gs_layout-grid_title = 'Änderungsprotokoll'.
    gs_layout-zebra      = 'X'.
    gs_layout-cwidth_opt = 'X'.
    gs_variant-report    = g_repid.
    gs_variant           = '/default'.
gs_layout-edit = 'X'.
Call ALV
    call method grid1->set_table_for_first_display
      exporting
        i_structure_name = 'ZTHLOG'
        is_layout        = gs_layout
        i_save           = 'A'
        is_variant       = gs_variant
      changing
        it_outtab        = t_zthlog
        it_fieldcatalog = gt_fieldcat[].
Ready for Input
    call method grid1->set_ready_for_input
      exporting
        i_ready_for_input = 1.
Eventregistration
    call method grid1->register_edit_event
      exporting
        i_event_id = cl_gui_alv_grid=>mc_evt_enter.
    create object g_event_receiver.
    set handler g_event_receiver->handle_data_changed for grid1.
else.
Refresh, if filled
    call method grid1->refresh_table_display.
endif.
set Cursor
call method cl_gui_control=>set_focus
    exporting
      control = grid1.
endmodule.                 " output_0100 OUTPUT+
There are alot of fields so the manual creation of the fieldcatalog should be avoided if possible.
Any Help is appreciated!
Best Regards
Stefan

Hi,
Check this
* Module Pai INPUT                                                     *
* PAI module                                                           *
module pai input.
save_ok = ok_code.
clear ok_code.
call method grid1->check_changed_data
    importing
      e_valid = v_valid.
" After this system will automatically update your changed data into
" internal table t_zthlog
case save_ok.
    when 'EXIT'.
      perform f_exit_program.
    when 'CANC'.
      perform f_exit_program.
    when 'BACK'.
      perform f_exit_program.
    when 'SAVE'.
      perform f_save_data.
endcase.
endmodule.                               " Pai INPUT
aRs

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Update ZTable from editable ALV

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