ASP.NET MVC 學習 --- 第四課(創建，刪除，獲取，驗證登陸用戶)

        public UserInfo CreateUser(UserInfo user)
        {
            try
            {
                TrainingCloudDataContext _dataContext = new TrainingCloudDataContext();     //Linq to SQL DB
                var _existUserAccount = _dataContext.UserInfos.SingleOrDefault(u => u.UserAccount == user.UserAccount);  //　判斷該用戶是否存在
                if (_existUserAccount != null)　//如果用戶已經存在
                {
                    throw new UserAccountExistException(user.UserAccount);
                }
                UserInfo _userAccount = new UserInfo();
                _userAccount.UserAccount = user.UserAccount;
                _userAccount.Password = user.Password;
                _userAccount.Email = user.Email;
                _userAccount.Phone = user.Phone;
                _dataContext.UserInfos.InsertOnSubmit(_userAccount);　//插入數據庫
                _dataContext.SubmitChanges();
                return GetUserInfo(user.UserAccount);
            }
            catch (Exception ex)
            {
                throw new Exception("Create User Account failed:" + ex.Message);
            }
            //throw new NotImplementedException();
        }

        public bool DeleteUser(UserInfo user)
        {
            try
            {
                TrainingCloudDataContext _dataContext = new TrainingCloudDataContext();
                var _existUserAccount = _dataContext.UserInfos.SingleOrDefault(u => u.UserAccount == user.UserAccount);
                if (_existUserAccount == null)
                {
                    throw new UserAccountNotExistException(user.UserAccount);
                }
                _dataContext.UserInfos.DeleteOnSubmit(_existUserAccount);
                _dataContext.SubmitChanges();
                return true;
            }
            catch (Exception ex)
            {
                throw new Exception("Delete User failed:" + ex.Message);
            }
            //throw new NotImplementedException();
        }

 　　 public UserInfo GetUserInfo(string userAccount)
        {
            try
            {
                TrainingCloudDataContext _dataContext = new TrainingCloudDataContext();
                var _existUserAccount = _dataContext.UserInfos.SingleOrDefault(u => u.UserAccount == userAccount);
                if (null  == _existUserAccount)
                {
                    throw new UserAccountNotExistException(userAccount);
                }
                return ConvertDBUserToContact(_existUserAccount);
            }
            catch (Exception ex)
            {
                throw new Exception("Get User Info failed:" + ex.Message);
            }
            //throw new NotImplementedException();
        }

        public bool VerifyUserLogOn(string accountName, string password)
        {
            try
            {
                TrainingCloudDataContext _dataContext = new TrainingCloudDataContext();
                var _existUserAccount = _dataContext.UserInfos.SingleOrDefault(u => u.UserAccount == accountName);
                if (null == _existUserAccount)
                {
                    throw new UserAccountNotExistException(accountName);
                }
                else
                {
                    string _passWord = HashEncryptPassword(password);　　//加密
                    if (_passWord != _existUserAccount.Password)
                    {
                        throw new UserPassWordNotMatchException();
                    }
                    else
                    {
                        return true;
                    }
                }
            }
            catch (Exception ex)
            {
                throw new Exception("Log on failed:" + ex.Message);
            }
            throw new NotImplementedException();
        }

        private UserInfo ConvertDBUserToContact(UserInfo user)
        {
            return new UserInfo() { UserAccount = user.UserAccount, Email = user.Email, Phone = user.Phone };
        }

        private string HashEncryptPassword(string password)
        {
            return FormsAuthentication.HashPasswordForStoringInConfigFile(password, "MD5");
        }
        #endregion