private void ByAuthorButton_Click(object sender, EventArgs e)
{
Author author = Author_listBox.SelectedItem as Author;
ShowAllBooks(bookService.BooksByAuthor(author));
ShowAllBookCopies(bookCopyService.BooksByAuthor(author));
}
/// <summary>
/// Checks if an author has been chosen in the listbox and then shows books by author.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnSortByAuthor_Click(object sender, EventArgs e)
{
Author auth = lbAuthors.SelectedItem as Author;
if (lbAuthors.SelectedIndex == -1)
{
MessageBox.Show("Please choose an author.");
}
else
{
ShowAllBooks(bookService.BooksByAuthor(auth.Id), lbBooks);
}
}
