private void eventAddVoucher(object sender, VoucherInfo e)
 {
     foreach (DataGridViewRow name in dataGridView1.Rows)
     {
         if (name.Cells[0].Value.ToString() == e.Code)
         {
             MessageBox.Show("Mã code này đã tồn tại");
             return;
         }
     }
     info.Add(e);
     using (DatabaseController data = new DatabaseController())
     {
         data.AddVoucher(e);
     }
     Invalidate();
 }
        private void eventAddVoucher(object sender, VoucherInfo e)
        {
            foreach (DataGridViewRow name in dataGridView1.Rows)
            {
                if (name.Cells[0].Value.ToString() == e.Code)
                {
                    MessageBox.Show(CodeIsExists, Error, MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
            int index = dataGridView1.Rows.Add(e.Code, e.ExpiryDate, e.Value, e.NumberInit, e.NumberRemain);

            Console.WriteLine(index);
            reloadTheme(index);
            using (DatabaseController data = new DatabaseController())
            {
                data.AddVoucher(e);
            }
        }