private void Btn_AddAuthorSave_Click(object sender, RoutedEventArgs e)
{
AuthorModel newAuthor = new AuthorModel();
newAuthor.FirstName = TxtBx_AuthorFirstName.Text;
newAuthor.LastName = TxtBx_AuthorLastName.Text;
newAuthor.MiddleName = TxtBx_AuthorMiddleName.Text;
newAuthor.YearOfBirth = TxtBx_AuthorYearOfBirth.Text;
newAuthor.YearOfDeath = TxtBx_AuthorYearOfDeath.Text;
if (newAuthor.IsValid)
{
AuthorTableModel authorTableModel = ((App)Application.Current).Model.AuthorTable;
if (authorTableModel.AddAuthor(newAuthor))
{
Close();
}
}
}