private void ProductArrToForm(Product curProduct)
        {
            ProductArr productArr = new ProductArr();

            // productArr.FillRentAvailableNew();
            //productArr.FillRent();
            productArr.FillRentAvailable(dtp_From.Value.Date, dtp_To.Value.Date);


            listbox_Cars.DataSource = productArr;

            if (productArr != null)
            {
                listbox_Cars.ValueMember   = "ID";
                listbox_Cars.DisplayMember = "FullModel";
            }

            if (curProduct != null)
            {
                listbox_Cars.SelectedValue = curProduct.Id;
            }
        }
        private void btn_Save_Click(object sender, EventArgs e)
        {
            if (CheckForm())
            {
                OrderRent orderRent = FormToOrderRent();

                OrderDetailsRentArr orderDetailsRentArr_New;
                OrderDetailsRentArr orderDetailsRentArr_Old = new OrderDetailsRentArr();

                ProductArr productArr = new ProductArr();
                productArr.FillRentAvailable(dtp_From.Value.Date, dtp_To.Value.Date);


                if (orderRent.Id == 0)
                {
                    if (productArr.IsContains(orderRent.Product))
                    {
                        orderRent.Product.Doesavailable = "InRent";

                        if (orderRent.Insert() && orderRent.Product.Update())
                        {
                            OrderRentArr orderRentArr = new OrderRentArr();
                            orderRentArr.Fill();
                            orderRent = orderRentArr.GetOrderRentWithMaxId();

                            orderDetailsRentArr_New = FormToOrderDetailsRentArr(orderRent);
                            orderDetailsRentArr_New.Insert();

                            CarExtraArr carExtraArrInOrder = orderDetailsRentArr_New.GetCarExtraArr();

                            carExtraArrInOrder.Update();

                            foreach (TabPage tp in this.tbc_Order.Controls)
                            {
                                ClearForm(tp);
                            }
                            LoadNew();

                            Form_Pay newform = new Form_Pay(orderRent);
                            Hide();
                            newform.ShowDialog();
                            Close();
                        }
                        else
                        {
                        }
                    }
                    else
                    {
                        MessageBox.Show("This car already in use", "Information", MessageBoxButtons.OK,
                                        MessageBoxIcon.Information);
                    }
                }
                else
                {
                    if (orderRent.Update())
                    {
                        orderDetailsRentArr_New = FormToOrderDetailsRentArr(orderRent);
                        orderDetailsRentArr_Old.Fill();
                        orderDetailsRentArr_Old = orderDetailsRentArr_Old.Filter(orderRent);

                        orderDetailsRentArr_Old.Delete();
                        orderDetailsRentArr_New.Insert();

                        (listbox_InOrder.DataSource as CarExtraArr).Update();
                        (listbox_Potential.DataSource as CarExtraArr).Update();


                        MessageBox.Show("Your Cerdit Card will be charged accordingly", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
                        foreach (TabPage tp in this.tbc_Order.Controls)
                        {
                            ClearForm(tp);
                        }

                        LoadNew();
                    }
                }
            }
        }