public String getCode() { Int32 date = 0x00; for (int i = 7; i >= 0; i--) { date <<= 1; date |= dic[(char)(97 + i)]; } if (ode.Equals(Ode.anode)) { date = ~date; } String s = Convert.ToString(date, 16); if (s.Length < 2) { return(s.PadLeft(2, '0')); } return(s.Substring(s.Length - 2, 2)); //return s; }