/*获取用户资料:将不为空的ID请求转发至DL,并将反馈结果翻译为数据契约*/
        public UserInfo GetUserInfo(string userID) {

            UserInfoEntity userInfoEntity = null;

            if (userID == null) {
                userInfoEntity = new UserInfoEntity();
                userInfoEntity.ErrorMessage = "314 Empty UserID! @Service";
            }
            else {
                userInfoEntity = doctorLogic.GetUserInfo(userID);
            }

            UserInfo userInfo = new UserInfo();
            TranslateUserInfoEntityToUserInfoContractData(userInfoEntity, userInfo);

            return userInfo;
        }
        /*将UserInfo对应的Entity翻译为数据契约*/
        private void TranslateUserInfoEntityToUserInfoContractData(
            UserInfoEntity userInfoEntity,
            UserInfo userInfo) {

            userInfo.ErrorMessage = userInfoEntity.ErrorMessage;

            userInfo.UserID = userInfoEntity.UserID;
            userInfo.LastName = userInfoEntity.LastName;
            userInfo.FirstName = userInfoEntity.FirstName;
            userInfo.Nationality = userInfoEntity.Nationality;
            userInfo.Gender = userInfoEntity.Gender;
            userInfo.ABO = userInfoEntity.ABO;
            userInfo.Rh = userInfoEntity.Rh;
            userInfo.Birthplace = userInfoEntity.Birthplace;
            userInfo.Birthday = userInfoEntity.Birthday;
            userInfo.Deathplace = userInfoEntity.Deathplace;
            userInfo.Deathday = userInfoEntity.Deathday;
            userInfo.Balance = userInfoEntity.Balance;
            userInfo.LastLoginDate = userInfoEntity.LastLoginDate;
            userInfo.City = userInfoEntity.City;
            userInfo.Address = userInfoEntity.Address;
            userInfo.Phone = userInfoEntity.Phone;
            userInfo.Email = userInfoEntity.Email;
            userInfo.EmergencyContactPerson = userInfoEntity.EmergencyContactPerson;
        }
        /*用户登录:若ID和Password均不为空,则转发至DL,将结果翻译为数据契约*/
        public UserInfo Login(string userID, string password) {

            UserInfoEntity userInfoEntity = null;

            if (userID == null) {
                userInfoEntity = new UserInfoEntity();
                userInfoEntity.ErrorMessage = "401 Empty UserID! @Service";
            }
            else if (password == null) {
                userInfoEntity = new UserInfoEntity();
                userInfoEntity.ErrorMessage = "402 Empty password! @Service";
            }
            else {
                userInfoEntity = userLogic.Login(userID, password);
            }

            UserInfo userInfo = new UserInfo();
            TranslateUserInfoEntityToUserInfoContractData(userInfoEntity, userInfo);

            return userInfo;
        }