ALV Grid Summierung erzwingen

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 METHOD on_data_changed.

    CLEAR: t_modi. REFRESH t_modi.

* Modified Fields list.
    t_modi = er_data_changed->mt_mod_cells.

    LOOP AT t_modi INTO w_modi.
      case w_modi-FIELDNAME.
*-
        when 'NETWR' .
          READ TABLE wp INTO wa_wp INDEX w_modi-row_id.
          IF sy-subrc = 0.
            add w_modi-value to wa_wp-NETWR.
            MODIFY wp FROM wa_wp INDEX w_modi-row_id
                      TRANSPORTING TOTAL.
          ENDIF.

* * 
*
*
*
endcase.


  clear: x_row, x_roid, w_row, w_col, w_value, x_col.
  CALL METHOD a1->GET_CURRENT_CELL
    IMPORTING
      E_ROW     = w_row
      E_VALUE   = w_value
      E_COL     = w_col
      ES_ROW_ID = x_row
      ES_COL_ID = x_col
      ES_ROW_NO = x_roid.


  CALL METHOD a1->refresh_table_display.

  call method a1->set_current_cell_via_id
    EXPORTING
      is_row_no    = x_roid
      is_column_id = x_col.
  ENDMETHOD.