public bool SaveData()
        {
            var result = false;

            using (var ctx = new EF6.RT2020Entities())
            {
                var item = ctx.ProductSupplement.Where(x => x.ProductId == this._ProductId).FirstOrDefault();
                if (item == null)
                {
                    item = new EF6.ProductSupplement();

                    item.SupplementId = Guid.NewGuid();
                    item.ProductId    = _ProductId;

                    ctx.ProductSupplement.Add(item);
                }
                item.Product.FixedPriceItem = chkFixedPrice.Checked;

                item.VipDiscount_FixedItem      = DecimalHelper.StringToDecimal(txtFixPriceItem.Text);
                item.VipDiscount_DiscountItem   = DecimalHelper.StringToDecimal(txtDiscountItem.Text);
                item.VipDiscount_NoDiscountItem = DecimalHelper.StringToDecimal(txtNoDiscountItem.Text);
                item.StaffDiscount = DecimalHelper.StringToDecimal(txtStaffDiscount.Text);

                ctx.SaveChanges();
            }

            return(result);
        }
        public bool SaveData()
        {
            var result = false;

            using (var ctx = new EF6.RT2020Entities())
            {
                var item = ctx.Product.Where(x => x.ProductId == _ProductId).FirstOrDefault();
                if (item != null)
                {
                    item.AlternateItem = txtVendorItemNum.Text.Trim();
                    item.ReorderLevel  = DecimalHelper.StringToDecimal(txtReorderLevel.Text);
                    item.ReorderQty    = DecimalHelper.StringToDecimal(txtReorderQuantity.Text);

                    ctx.SaveChanges();
                }
            }

            return(result);
        }