private void BtnUpdateBook_Click(object sender, RoutedEventArgs e)
{
if (!Validation())
{
return;
}
Book newBook = new Book
{
Id = bk.Id,
Name = tbBookName.Text,
Author = tbAuthorName.Text,
CountNow = Convert.ToInt32(tbBookCount.Text),
Count = (Convert.ToInt32(tbBookCount.Text) - bk.CountNow) + bk.Count,
Price = Convert.ToDecimal(tbPrice.Text)
};
dr.UpdateBooks(newBook);
btnAddBook.Visibility = Visibility.Visible;
btnUpdateBook.Visibility = Visibility.Hidden;
btnDeleteBook.Visibility = Visibility.Hidden;
ResetTextBox();
FillDG();
}