private void FormCreateSale_Load(object sender, EventArgs e)
 {
     dateTimePicker1.Value = (DateTime)salesRow.Cells["time"].Value;
     tbSalesman.Text       = salesRow.Cells["saleMan"].Value.ToString();
     tbCustomer.Text       = salesRow.Cells["customerName"].Value.ToString();
     tbSalesman.Text       = salesRow.Cells["saleMan"].Value.ToString();
     cbPayment.Text        = salesRow.Cells["paymentName"].Value.ToString();
     lbSaleNumber.Text     = salesRow.Cells["saleNumber"].Value.ToString();
     sumPrice          = double.Parse(salesRow.Cells["tatolPrice"].Value.ToString());
     tbTotalPrice.Text = sumPrice.ToString("f") + "元";
     //将支付方式绑定到支付方式文本框
     list = db.GetDataInformation("payment_table", "payment_name");//从数据库中获取支付方式
     foreach (string str in list)
     {
         cbPayment.Items.Add(str);
     }
     //将单位绑定到单位文本框
     list = db.GetDataInformation("quantifier_table", "quantifier_name");//从数据库中获取单位名称
     foreach (string str in list)
     {
         cbQuantifier.Items.Add(str);
     }
     dt = db.GetSalesDetails(lbSaleNumber.Text);
     dataGridView1.DataSource = dt;
 }