private void AddBtn_Click(object sender, RoutedEventArgs e) { _book = gridBook.DataContext as Book; _book.Genre = (Genre)cbGenre.SelectedItem; _book.Edition = (Edition)cbEdition.SelectedItem; _book.AddedBy = MainWindow.user.Id; _book.AddedTime = DateTime.Now; if (dbContext.AddBook(_book)) { MessageBox.Show("Книга добавлена успешно!"); MainWindow._MainFrame.Navigate(new PageBooks()); } else { MessageBox.Show("Возникли ошибки при добавлении книги!"); } }