Refresh ALV Grid on user action

DATA ref_grid TYPE REF TO cl_gui_alv_grid.

* to reflect the data changed into internal table
      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->refresh_table_display.
      ENDIF.

******************************************************
Option -2.

* to reflect the data changed into internal table
      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 = gc_x.