//Delete
private void buttonBkDel_Click(object sender, EventArgs e)
{
DialogResult ans = MessageBox.Show("Are you sure you want to delete the Book information?", "Delete Confirmation", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
if (ans == DialogResult.Yes)
{
if (OrderDA.SearchByBook(Convert.ToInt64(textBoxBkISBN.Text)) != null)
{
MessageBox.Show("This book has open orders in the system, please verify the orders before deleting this book.", "ALERT!");
return;
}
BookDA.Delete(createBook().BkISBN);
BookDA.ListBooks(listViewBooks);
UpdateComboBoxes();
}
}