private void button_OpenCart_Click(object sender, EventArgs e) { try { var cartIndex = dataGridView_Carts.CurrentCell.RowIndex; var cartID = Convert.ToInt32(dataGridView_Carts.Rows[cartIndex].Cells["CartID"].Value); CartManager.DisplayCart(cartID); } catch (Exception ex) { //TODO: Message? Issue is most likely having not selected a cart or card } }