private void orderQueryButton_Click(object sender, EventArgs e)
 {
     if (inputOrderIdTextBox.Text != "")
     {
         orderId             = Convert.ToInt32(this.inputOrderIdTextBox.Text);
         orderIdTextBox.Text = orderId.ToString();
         if (customer != null)
         {
             if (SqlManage.orderQuery(orderId).CustomerId == customer.CustomerId)
             {
                 customerIdTextBox.Text    = SqlManage.orderQuery(orderId).CustomerId.ToString();
                 customerNameTextBox.Text  = SqlManage.customerQuery(Convert.ToInt32(SqlManage.orderQuery(orderId).CustomerId)).Name;
                 myDataGridView.DataSource = SqlManage.detailQuery(orderId).Tables[0];
             }
             else
             {
                 MessageBox.Show("该用户没有此订单!");
             }
         }
         else
         {
             customerIdTextBox.Text    = SqlManage.orderQuery(orderId).CustomerId.ToString();
             customerNameTextBox.Text  = SqlManage.customerQuery(Convert.ToInt32(SqlManage.orderQuery(orderId).CustomerId)).Name;
             myDataGridView.DataSource = SqlManage.detailQuery(orderId).Tables[0];
         }
     }
     else
     {
         MessageBox.Show("订单号不能为空!");
     }
 }
 private void OrderQueryForm_Load(object sender, EventArgs e)
 {
     if (customer != null)
     {
         orderIdTextBox.Text       = orderId.ToString();
         customerIdTextBox.Text    = SqlManage.orderQuery(orderId).CustomerId.ToString();
         customerNameTextBox.Text  = SqlManage.customerQuery(Convert.ToInt32(SqlManage.orderQuery(orderId).CustomerId)).Name;
         myDataGridView.DataSource = SqlManage.detailQuery(orderId).Tables[0];
     }
     else
     {
         dealButton.Hide();
     }
 }
        private void dealButton_Click(object sender, EventArgs e)
        {
            float    amount     = SqlManage.amountQuery(orderId);
            Order    order      = SqlManage.orderQuery(orderId);
            int      customerId = order.CustomerId;
            Customer customer   = SqlManage.customerQuery(customerId);

            order.IsDealed = true;
            if (amount < customer.Balance + customer.CustomerCreditLimit)
            {
                Bill     bill          = null;
                DateTime payDate       = DateTime.Now;
                float    amountPayable = amount;
                float    payAmount;
                int      billId = SqlManage.queryMaxBillId() + 1;
                if (customer.Balance < amount)
                {
                    payAmount = customer.Balance;
                }
                else
                {
                    payAmount = amount;
                }
                bill = new Bill(billId, orderId, amountPayable, payDate, payAmount);
                SqlManage.insertBill(bill);

                customer.Balance -= amount;
                if (SqlManage.updateCustomer(customer) &&
                    SqlManage.updateOrder(order))
                {
                    //更新库存
                    for (int i = 0; i < myDataGridView.RowCount - 1; i++)
                    {
                        int   goodsId  = Convert.ToInt32(myDataGridView[0, i].Value);
                        Goods goods    = SqlManage.goodsQuery(goodsId);
                        int   goodsNum = Convert.ToInt32(myDataGridView[1, i].Value);
                        goods.ActualStorage -= goodsNum;
                        SqlManage.updateGoods(goods);
                    }
                    MessageBox.Show("支付成功!");
                }
            }
            else
            {
                MessageBox.Show("已超出最大赊购限额!");
            }
        }