Paypal 以折扣方式将多个商品添加到购物车
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【中文标题】Paypal 以折扣方式将多个商品添加到购物车【英文标题】：Paypal add to cart multiple items form with discount 【发布时间】：2011-12-12 00:58:44 【问题描述】：我正在尝试使用 paypal 添加到购物车表单根据买家的购买金额提供折扣。基本上我会提供折扣码 Disc1、Disc2、Disc3、Disc4，它们将打折 5 美元、10 美元、20 美元、50 美元。但只有当购买金额分别超过 25 美元、50 美元、100 美元、250 美元时，它们才能起作用。
我正在尝试通过调用 javascript 文件来执行此操作，如果满足最低价格条件，该文件将应用折扣。
问题是表单用于多个项目。所以“金额”的变量不存在，但每个选项都有不同的金额，所以 option_amount0、option_amount1、option_amount2 ......等等。如果有一个“金额”，我可以使代码工作，但不像这里多个项目/价格。
html 代码如下所示：
<head>
<script language="JavaScript" type="text/javascript" src="coupon.js"></script>
</head>
<form target="_blank" action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_cart">
<input type="hidden" name="business" value="email@email.com">
<input type="hidden" name="lc" value="US">
<input type="hidden" name="item_name" value="Products">
<input type="hidden" name="button_subtype" value="">
<input type="hidden" name="no_shipping" value="1">
<input type="hidden" name="undefined_quantity" value="1">
<input type="hidden" name="rm" value="1">
<input type="hidden" name="return" value="www.website.com">
<input type="hidden" name="cancel_return" value="www.website.com">
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="tax_rate" value="0.000">
<input type="hidden" name="shipping" value="0.00">
<input type="hidden" name="add" value="1">
<input type="hidden" name="bn" value="PP-ShopCartBF:btn_cart_LG.gif:NonHosted">
<table>
<tr><td><br /><h4>
<center><input type="hidden" name="on0" value="Products">Choose a Product</center></h4></td></tr><tr><td><center>
<select name="os0" style="width: 230px"></center>
<option value="item1">Product 1 : $15</option>
<option value="item2">Product 2 : $25</option>
<option value="item3">Product 3 : $75</option>
<option value="item4">Product 4 : $150</option>
<option value="item5">Product 5 : $300</option>
</select> </td></tr>
</table>
<input type="hidden" name="currency_code" value="USD">
<input type="hidden" name="option_select0" value="item1">
<input type="hidden" name="option_amount0" value="15.00">
<input type="hidden" name="option_select1" value="item2">
<input type="hidden" name="option_amount1" value="25.00">
<input type="hidden" name="option_select2" value="item3">
<input type="hidden" name="option_amount2" value="75.00">
<input type="hidden" name="option_select3" value="item4">
<input type="hidden" name="option_amount3" value="150.00">
<input type="hidden" name="option_select4" value="item4">
<input type="hidden" name="option_amount4" value="300.00">
<input type="hidden" name="option_index" value="0">
<input type="hidden" name="discount_amount">
<br />
<!-- Enter Coupon -->
<center>Coupon Code:</span> <br />
<input type="text" name="text1" /> </center>
<br />
<!-- End Coupon -->
<input type="image" src="images/btn_cart.gif" border="0" onclick=CalculateOrder(this.form) name="submit" >
<img border="0" src="images/btn_cart.gif" >
</form>
Javascript 文件是：
var coup1="Disc1";
var coup2="Disc2";
var coup3="Disc3";
var coup4="Disc4";
function CalculateOrder(form)
if (form.text1.value == coup1 && ((form.option_amount.value>=25)))
form.discount_amount.value = "5";
if (form.text1.value == coup2 && ((form.option_amount.value>=50)))
form.discount_amount.value = "10";
if (form.text1.value == coup3 && ((form.option_amount.value>=100)))
form.discount_amount.value = "20";
if (form.text1.value == coup4) && ((form.option_amount.value>=250)))
form.discount_amount.value = "50";
如何从 HTML 表单中创建 option_amount 的脚本帐户？ 任何帮助将不胜感激！
【问题讨论】：
【参考方案1】：我正在使用 PayPalMerchantSDK 进行购物车集成。
对于您的回答，我采用这种情况，因为我需要使用快速结帐按钮将购物篮发送到贝宝。我的篮子里还有一张可以申请总金额的折扣券。我正在使用 Asp.Net MVC 解决方案
请按照贝宝支付集成的代码和说明进行操作。
第一步：下载并参考 PayPal_Merchant_SDK.dll
第 2 步：将所需的设置添加到您的 PayPal_Merchant_SDK 服务的 web.config 文件中
第 3 步：在您的购物篮控制器付款操作中添加以下代码
[HttpPost]
public ActionResult Payment()
var basketForPayment = GetBasket();
if (basketForPayment.Order == null || basketForPayment.OrderItem.Count <= 0 || basketForPayment.Order.DVEcomOrderStatus.ID != (int)DvEcomOrderStatusEnum.Initiated) return View("basket-empty", new DvClientViewModel(UrlBasketEmptyPage, Languages.English));
//Paypal Expresscheckout Integration===============================
// Step 1: Create the paypal request object
var request = new SetExpressCheckoutRequestType();
PopulatePaypalRequestObject(request, basketForPayment);
// Step 2: Invoke the API
SetExpressCheckoutReq getTockenWrapper = new SetExpressCheckoutReq();
getTockenWrapper.SetExpressCheckoutRequest = request;
PayPalAPIInterfaceServiceService service = new PayPalAPIInterfaceServiceService();
SetExpressCheckoutResponseType setEcResponse = service.SetExpressCheckout(getTockenWrapper);
// Step 3: Check for API return status and get the payment tocken
HttpContext currContext = System.Web.HttpContext.Current;
currContext.Items.Add("paymentDetails", request.SetExpressCheckoutRequestDetails.PaymentDetails);
var currResponseContext = SetPayPalKeyResponseObjects(service, setEcResponse);
var responseobject = (Dictionary<string, string>) currResponseContext.Items["Response_keyResponseObject"];
if (responseobject["API Status"] != "SUCCESS")
return View("Invalid-basket", new DvClientViewModel(UrlBasketEmptyPage, Languages.English));
//Step 4: Make Payment with the tocken
var tocken = responseobject["EC token"];
string queryString = "https://www.sandbox.paypal.com/webscr?cmd=_express-checkout";
if(!string.IsNullOrEmpty(tocken))
//Update Order with the transaction token
_orderRepository.UpdateOrder(model.Order.OrderNumber, tocken);
queryString += string.Format("&token=0", tocken);
Response.Redirect(queryString);
return RedirectToAction("Payment");
第 4 步：您的付款响应操作
public ActionResult PaymentResponse()
// If we have a SECURE_SECRET then validate the incoming data using the MD5 hash
//included in the incoming data
if (Request.QueryString["token"].Length > 0 && Request.QueryString["PayerID"].Length > 0 )
var token = Request.QueryString["token"];
var payerId = Request.QueryString["PayerID"];
var order = _orderRepository.GetOrderTransaction(token);
if(order !=null)
//Update Order with the transaction token
_orderRepository.UpdateOrderSuccess(order.OrderNumber, token, payerId);
PaymentResponseClearSessionAndCookie();
Response.Redirect("/");
return View("Invalid-basket", new DvClientViewModel(UrlBasketEmptyPage, Languages.English));
第 5 步：为 paypal 准备购物篮
private void PopulatePaypalRequestObject(SetExpressCheckoutRequestType request, DvEcomOrderViewModel basket)
var ecDetails = new SetExpressCheckoutRequestDetailsType();
ecDetails.ReturnURL = ConfigurationManager.AppSettings["PayPalReturnUrl"]; ecDetails.CancelURL = ConfigurationManager.AppSettings["PayPalCancelUrl"]; ecDetails.BuyerEmail = basket.Order.CustomerEmailAddress;
//Fix for release
ecDetails.AddressOverride = "0";
ecDetails.NoShipping = "1";
/* Populate payment requestDetails.
* SetExpressCheckout allows parallel payments of upto 10 payments.
* This samples shows just one payment.
*/
var paymentDetails = new PaymentDetailsType();
ecDetails.PaymentDetails.Add(paymentDetails);
double orderTotal = 0.0;
double itemTotal = 0.0;
var currency = (CurrencyCodeType)
Enum.Parse(typeof(CurrencyCodeType), ConfigurationManager.AppSettings["PayPalCurrency"]);
paymentDetails.OrderTotal = new BasicAmountType(currency, orderTotal.ToString(CultureInfo.InvariantCulture));
orderTotal += Double.Parse(basket.Order.SubTotal.ToString(CultureInfo.InvariantCulture)); // Subtotal
paymentDetails.ShippingTotal = new BasicAmountType(currency, basket.Order.DeliveryAmount.ToString(CultureInfo.InvariantCulture)); // Add delivery charge
orderTotal += Double.Parse(basket.Order.DeliveryAmount.ToString(CultureInfo.InvariantCulture));
paymentDetails.TaxTotal = new BasicAmountType(currency, basket.Order.VAT.ToString(CultureInfo.InvariantCulture)); //Add Vat Tax
orderTotal += Double.Parse(basket.Order.VAT.ToString(CultureInfo.InvariantCulture));
//paymentDetails.ShippingDiscount = new BasicAmountType(currency, basket.Order.DiscountAmount.ToString(CultureInfo.InvariantCulture)); // Subtract discount
orderTotal -= Double.Parse(basket.Order.DiscountAmount.ToString(CultureInfo.InvariantCulture));
paymentDetails.OrderDescription = string.Format("Payment for the basket order 0", basket.Order.OrderNumber);
paymentDetails.PaymentAction = (PaymentActionCodeType)
Enum.Parse(typeof(PaymentActionCodeType), "SALE");
AddressType shipAddress = new AddressType();
shipAddress.Name = string.Format("0 1", basket.Order.DeliveryFirstName, basket.Order.DeliverySurname);
shipAddress.Street1 = basket.Order.BillingAddress1;
shipAddress.Street2 = basket.Order.BillingAddress2 ?? "-";
shipAddress.CityName = basket.Order.DeliveryTown ?? "-";
shipAddress.StateOrProvince = basket.Order.DeliveryCounty;
shipAddress.Country = (CountryCodeType)
Enum.Parse(typeof(CountryCodeType), "GB");
shipAddress.PostalCode = basket.Order.DeliveryPostcode;
//Fix for release
shipAddress.Phone = basket.Order.DeliveryTelePhone;
ecDetails.PaymentDetails[0].ShipToAddress = shipAddress;
// Each payment can include requestDetails about multiple items
// This example shows just one payment item
//ApplyDiscount
if (basket.Order.DiscountAmount > 0)
decimal disAmt = basket.Order.DiscountAmount -
(basket.Order.DiscountAmount + basket.Order.DiscountAmount);
PaymentDetailsItemType discount = new PaymentDetailsItemType();
discount.Amount = new BasicAmountType(currency, disAmt.ToString(CultureInfo.InvariantCulture));
discount.Description = "Discount Applied";
discount.Name = "Voucher Code";
paymentDetails.PaymentDetailsItem.Add(discount);
var itemDetails = new PaymentDetailsItemType();
foreach (var item in basket.OrderItem)
itemDetails.Name = item.ProductName;
itemDetails.Amount = new BasicAmountType(currency, item.UnitPrice.ToString(CultureInfo.InvariantCulture));
itemDetails.Quantity = Int32.Parse(item.Quantity.ToString(CultureInfo.InvariantCulture));
itemDetails.ItemCategory = (ItemCategoryType)
Enum.Parse(typeof(ItemCategoryType), "0");
itemTotal += Double.Parse(item.UnitPrice.ToString(CultureInfo.InvariantCulture)) * itemDetails.Quantity.Value;
itemDetails.Tax = new BasicAmountType(currency, item.VAT.ToString(CultureInfo.InvariantCulture));
itemDetails.Description = item.ProductName;
paymentDetails.PaymentDetailsItem.Add(itemDetails);
itemTotal -= Double.Parse(basket.Order.DiscountAmount.ToString(CultureInfo.InvariantCulture));
paymentDetails.ItemTotal = new BasicAmountType(currency, itemTotal.ToString(CultureInfo.InvariantCulture));
paymentDetails.OrderTotal = new BasicAmountType(currency, orderTotal.ToString(CultureInfo.InvariantCulture));
request.SetExpressCheckoutRequestDetails = ecDetails;
第 6 步：您无需再开始...
第 7 步：以上步骤将带您到 paypal 成功交易。接下来，您需要通过另一个 Paypal Authorize api 函数调用通过 Post 方法来授权真实的交易。过程同上。
【讨论】：
我正在尝试您的方法，但我不明白何时“PaymentResponse()”以及如何调用“PaymentResponse()”。你能澄清一下吗？我的流程是使用 Ajax 到付款方法，然后获取 Redirect_URL 并在客户端提示新的付款窗口。但是我怎么知道付款是否完成。用户可以在不离开页面的情况下进行交易吗？谢谢。 +1 感谢您提供此代码摘录。这与当今世界（即 2017 年）应该使用的工作流程相同吗？和/或是否有任何改变？？？【参考方案2】：我找到了一个解决方案，虽然有点长，但它仍然可以达到目的。
我对 js 代码做了类似的事情：
var coup1="Disc1";
var coup2="Disc2";
var coup3="Disc3";
var coup4="Disc4";
function CalculateOrder(form)
if (form.text1.value == coup1 && (form.os0.value == "item2" || form.os0.value == "item3" || form.os0.value == "item4" || form.os0.value == "item5"))
form.discount_amount.value = "5";
if (form.text1.value == coup2 && (form.os0.value == "item3" || form.os0.value == "item4" || form.os0.value == "item5"))
form.discount_amount.value = "10";
if (form.text1.value == coup3 && (form.os0.value == "item4" || form.os0.value == "item5"))
form.discount_amount.value = "20";
if (form.text1.value == coup4 && (form.os0.value == "item5"))
form.discount_amount.value = "50";
【讨论】：
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