/// <summary>
        /// บันทึกการแก้ไข โดยไล่ Disable ตัวเดิมทิ้งให้หมด แล้ว add ใหม่
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button6_Click(object sender, EventArgs e)
        {
            DialogResult dr = MessageBox.Show("คุณต้องการบันทึกข้อมูล ใช่หรือไม่ ?", "คำเตือนจากระบบ", MessageBoxButtons.YesNo);

            switch (dr)
            {
            case DialogResult.Yes:
                using (SSLsEntities db = new SSLsEntities())
                {
                    var order = db.SaleOrderWarehouse.SingleOrDefault(w => w.Code == code);
                    foreach (var item in order.SaleOrderWarehouseDtl.Where(w => w.Enable == true).ToList())
                    {
                        item.UpdateDate      = DateTime.Now;
                        item.UpdateBy        = SingletonAuthen.Instance().Id;
                        item.Enable          = false;
                        db.Entry(item).State = EntityState.Modified;
                    }
                    List <SaleOrderWarehouseDtl> details = new List <SaleOrderWarehouseDtl>();
                    SaleOrderWarehouseDtl        detail;
                    decimal discountList = 0;
                    for (int i = 0; i < dataGridView1.Rows.Count; i++)
                    {
                        detail = new SaleOrderWarehouseDtl();
                        detail.FKSaleOrderWarehouse = order.Id;
                        detail.Enable       = true;
                        detail.Description  = dataGridView1.Rows[i].Cells[colRemark].Value.ToString();
                        detail.CreateDate   = DateTime.Now;
                        detail.CreateBy     = SingletonAuthen.Instance().Id;
                        detail.UpdateDate   = DateTime.Now;
                        detail.UpdateBy     = SingletonAuthen.Instance().Id;
                        detail.FKProductDtl = int.Parse(dataGridView1.Rows[i].Cells[colId].Value.ToString());
                        detail.Qty          = decimal.Parse(dataGridView1.Rows[i].Cells[colQty].Value.ToString());          // จำนวนหน่วย
                        detail.PricePerUnit = decimal.Parse(dataGridView1.Rows[i].Cells[colPricePerUnit].Value.ToString()); // จำนวนหน่วย
                        detail.BathDiscount = decimal.Parse(dataGridView1.Rows[i].Cells[colDiscount].Value.ToString());     // จำนวนเงินส่วนลด
                        detail.TotalPrice   = decimal.Parse(dataGridView1.Rows[i].Cells[colTotalPrice].Value.ToString());   // จำนวนเงิน หลังหักส่วนลด
                        details.Add(detail);
                        discountList += decimal.Parse(dataGridView1.Rows[i].Cells[colDiscount].Value.ToString());
                        if (i >= dataGridView1.Rows.Count - 2)
                        {
                            break;
                        }
                    }
                    db.SaleOrderWarehouseDtl.AddRange(details);
                    order.TotalDiscountInList = discountList;     // วนใน ลิส
                    order.TotalBalance        = decimal.Parse(textBoxTotalBalance.Text);
                    order.UpdateDate          = DateTime.Now;
                    order.UpdateBy            = SingletonAuthen.Instance().Id;
                    db.Entry(order).State     = EntityState.Modified;
                    db.SaveChanges();
                    saleOrderWarehouseListForm.LoadGrid();
                    this.Dispose();
                }
                break;

            case DialogResult.No:
                break;
            }
        }