数据库记录定位问题

var
  CurrPos: TBookMark;
begin
  with MasterCDS do begin
    if not (State in [dsInsert, dsEdit]) then exit;
    Post;
    CurrPos := GetBookMark;
    ^^^^^^^^^^^^^^^^^^^^^^
    ApplyUpdates(0);
    Try
      GotoBookMark(CurrPos);
      ^^^^^^^^^^^^^^^^^^^^^^
    except
      raise Exception.Create('fdkdfdk')
    end;
  end;
  MasterCDS.ReadOnly := true;
end;Good luck