Question

我参考此tutorial来为我的网站设置基本的PayPal付款系统。点击“立即购买”按钮后，我将重定向到PayPal付款页面进行付款。

付款后，我被重定向回“ CompletePayment.aspx”页面以确认我的付款。但是，当我单击“确认购买”按钮时，它给我一个错误400错误的请求（如下所示）。

我在我的web.config中包含了客户端ID和密码。

这是我的代码：

（ConfirmOrder.aspx）

 List<UserShoppingCartDAO> scList = UserShoppingCartDAO.GetCartOfUser(uID);
        Product p = Product.getProduct(scList[0].ProductID.ToString());


        decimal deliveryCharges = p.price * 0.05m;
        string deliveryChargesStr = deliveryCharges.ToString();
        decimal postagePackingCost = 10m;
        decimal examPaperPrice = p.price;
        int quantityOfExamPapers = scList[0].ProductQuantity; 
        decimal subtotal = (quantityOfExamPapers * examPaperPrice);
        decimal total = subtotal + postagePackingCost;

        //Authenticate with paypal
        var config = ConfigManager.Instance.GetProperties();
        var accessToken = new OAuthTokenCredential(config).GetAccessToken();

        //Get APIContent Object
        var apiContext = new APIContext(accessToken);


        var examPaperItem = new Item();
        examPaperItem.name = "Past Exam Paper";
        examPaperItem.currency = "SGD";
        examPaperItem.price = examPaperPrice.ToString();
        examPaperItem.sku = "PEPCO5027m15";

        examPaperItem.quantity = quantityOfExamPapers.ToString();

        var transactionDetails = new Details();
        transactionDetails.tax = "0";
        transactionDetails.shipping = postagePackingCost.ToString();
        transactionDetails.subtotal = subtotal.ToString("0.00");

        var transactionAmount = new Amount();
        transactionAmount.currency = "SGD";
        transactionAmount.total = total.ToString("0.00");
        transactionAmount.details = transactionDetails;

        var transaction = new Transaction();
        transaction.description = "Your order of Past Exam Papers";
        transaction.invoice_number = Guid.NewGuid().ToString();
        // ^ ID of record storing the order
        transaction.amount = transactionAmount;
        transaction.item_list = new ItemList
        {
            items = new List<Item> { examPaperItem }
        };

        var payer = new Payer();
        payer.payment_method = "paypal";

        var redirectUrls = new RedirectUrls();
        redirectUrls.cancel_url = "http://localhost:53238/Cancel.aspx";
        redirectUrls.return_url = "http://localhost:53238/CompletePurchase.aspx";


        var payment = Payment.Create(apiContext, new Payment
        {
            intent = "sale",
            payer = payer,
            transactions = new List<Transaction> { transaction },
            redirect_urls = redirectUrls
        });

        Session["paymentId"] = payment.id;

        foreach (var link in payment.links)
        {
            if (link.rel.ToLower().Trim().Equals("approval_url"))
            {
                Response.Redirect(link.href);
            }
        }

这是CompletePurchase（包含问题代码的文件）的网络表单

        //Authenticate with paypal
        var config = ConfigManager.Instance.GetProperties();
        var accessToken = new OAuthTokenCredential(config).GetAccessToken();

        //Get APIContent Object
        var apiContext = new APIContext(accessToken);

        var paymentId = Session["paymentId"].ToString();


        if (!String.IsNullOrEmpty(paymentId))
        {
            var payment = new Payment() { id = paymentId };

            //retrieve the payerId from the querystring and use it to create a new payment execution object
            var payerId = Request.QueryString["PayerID"].ToString();

            var paymentExecution = new PaymentExecution() { payer_id = payerId };

            //execute the payment
            var executedPayment = payment.Execute(apiContext, paymentExecution);

            litInformation.Text = "<p>Your order has been completed</p>";
            btnConfirmPurchase.Visible = false;
        }

第二个代码块中的var executePayment行是这里的问题。

请帮助！

C＃PayPal错误（400）付款执行方法中的错误请求

0 个答案: