public void deleteButton_Click(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows.Count > 0)
{
int index = dataGridView1.SelectedRows[0].Index;
int id = 0;
bool converted = Int32.TryParse(dataGridView1[0, index].Value.ToString(), out id);
if (converted == false)
{
return;
}
var readerRepository = new ReaderRepository();
var dealRepository = new DealRepository();
var bookCopyInDealRepository = new BookCopyInDealRepository();
List <Deal> deals = dealRepository.GetDealsByReaderId(id);
List <BookCopyInDeal> bookCopyInDeals = bookCopyInDealRepository.GetBookCopiesInDealByReaderId(id);
for (int i = 0; i < bookCopyInDeals.Count; i++)
{
bookCopyInDealRepository.Remove(bookCopyInDeals[i].Id);
}
for (int i = 0; i < deals.Count; i++)
{
dealRepository.Remove(deals[i].Id);
}
readerRepository.Remove(id);
_db.SaveChanges();
SetDataGridView();
MessageBox.Show("Объект удален");
}
}