/*查询排队状况 MyQueueStatus(Guid gAppointment)*/
 public QueueStatus MyQueueStatus(string userID, string password, string sAppointment) {
     UserService userService = new UserService();
     UserInfo userInfo = userService.Login(userID, password);
     if (userInfo.ErrorMessage == null) {
         return userService.MyQueueStatus(sAppointment);
     }
     else {
         QueueStatus queueStatus = new QueueStatus();
         queueStatus.ErrorMessage = userInfo.ErrorMessage;
         return queueStatus;
     }
 }