public BookInfo(int bookId, int userId)
        {
            InitializeComponent();
            //ad = adminMenu;
            //ud = userMenu;
            this.bookId = bookId;
            this.userId = userId;

            using (var db = new LibraryDBEntities())
            {
                var book = db.Books.Find(bookId);
                BookName.Content   = book.Name;
                BookAuthor.Content = book.Author.FName + " " + book.Author.LName;
                BookGenre.Content  = book.Genre.Name;
                BookTheme.Content  = book.Theme.Name;
                Description.Text   = book.Description;
                Location.Content   = book.Location.Name;

                var user = db.Users.Find(userId);

                if (user.RoleID == 1)
                {
                    AddToWs.Visibility = Visibility.Collapsed;
                }


                if (book.Id % 2 == 0)
                {
                    var uriSource = new Uri(@"/SoulMelody;component/Images/cover1.jpg",
                                            UriKind.Relative);
                    Cover.Source = new BitmapImage(uriSource);
                }
                if (book.Id % 2 != 0)
                {
                    var uriSource = new Uri(@"/SoulMelody;component/Images/cover2.jpg",
                                            UriKind.Relative);
                    Cover.Source = new BitmapImage(uriSource);
                }
                if (book.Id % 3 == 0)
                {
                    var uriSource = new Uri(@"/SoulMelody;component/Images/cover3.jpg",
                                            UriKind.Relative);
                    Cover.Source = new BitmapImage(uriSource);
                }
                //else
                //{
                //    var uriSource = new Uri(@"/SoulMelody;component/Images/cover4.jpg",
                //       UriKind.Relative);
                //    Cover.Source = new BitmapImage(uriSource);
                //}
            }
        }
        private void LoginBtn_Click(object sender, RoutedEventArgs e)
        {
            using (LibraryDBEntities db = new LibraryDBEntities())
            {
                var login = Login.Text;

                var password = Password.Password;

                var loginSearch = from user in db.Users
                                  where user.Login == login
                                  select user;

                var userResult = loginSearch.FirstOrDefault();



                try
                {
                    if (Login.Text != "" && Password.Password != "")
                    {
                        if (userResult != null)
                        {
                            if (password == userResult.Password)
                            {
                                if (userResult.RoleID == 1)
                                {
                                    AdminMenu menu = new AdminMenu(userResult.Id);
                                    menu.Show();

                                    StartingUC startUC = new StartingUC(st);
                                    st.startGrid.Children.Clear();
                                    st.startGrid.Children.Add(startUC);
                                }
                                if (userResult.RoleID == 2)
                                {
                                    UserMenu menu = new UserMenu(userResult.Id);
                                    menu.Show();
                                    StartingUC startUC = new StartingUC(st);
                                    st.startGrid.Children.Clear();
                                    st.startGrid.Children.Add(startUC);
                                }
                            }
                            else
                            {
                                MessageBox.Show("Wrong password!");
                            }
                        }

                        else
                        {
                            MessageBox.Show("Login not found!");
                        }
                    }
                    else
                    {
                        MessageBox.Show("Fill in all fields!");
                    }
                }
                catch (Exception exception)
                {
                    MessageBox.Show(exception.Message);
                }
            }
        }