public string VerifyUser(string userName, string userPassword, string serialNumber, string typeID) { string text = ""; bool flag = false; SystemType type = new SystemType(); SystemTypeInfo info = type.FindByOID(typeID); if (info == null) { text = "系统[" + typeID + "]编号不存在,请与开发商联系!"; flag = true; } if (flag) { return(text); } User user2 = new User(); return(user2.VerifyUser(userName, userPassword, this.m_SessionID)); }