PayPal Express Checkout开发

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PayPal Express Checkout开发

　　最近在对接PayPal，告一段落，总结一下。

　　　说一下PayPal Express Checkout的支付流程。

　　　　现在去https://www.sandbox.paypal.com/home，注册两个账号，一个是个人账号，一个是商家账号。用来付款测试。商家账号需要获取API许可，如下图：

　　　　这里用ExpressCheckout对接，先添加WCF地址：https://www.paypal.com/wsdl/PayPalSvc.wsdl，这里要添加Web引用，不要添加服务引用。

　　　一切准备就绪，现在来一步一步的完成这个流程。　　

　　　　先看SetExpressCheckout，这是创建支付的方法。

public static SetExpressCheckoutResponseType SetExpressCheckout()        {            //配置服务信息                //API凭证                    string APIAccountName = "*********_api1.qq.com";                string APIAccountPassword = "**********";                string Signature = "**********************************************";                //API凭证            CustomSecurityHeaderType header = new CustomSecurityHeaderType            {                Credentials = new UserIdPasswordType                {                    Username = APIAccountName,                    Password = APIAccountPassword,                    Signature = Signature                }            };            PayPalAPIAASoapBinding service = new PayPalAPIAASoapBinding();            service.Url = "https://api-3t.sandbox.paypal.com/nvp"; //这里是测试地址            service.RequesterCredentials = header;            //配置服务信息            //配置请求信息            SetExpressCheckoutReq req = new SetExpressCheckoutReq();                //商品详情                    var cartItems = new List<PaymentDetailsItemType>();                    cartItems.Add(new PaymentDetailsItemType                    {                        Name ="ProductName",                        Quantity = "3",                        Amount = new BasicAmountType                        {                            currencyID = CurrencyCodeType.USD,                            Value ="2"                        },                        Description = "ProductName"                    });                    cartItems.Add(new PaymentDetailsItemType                    {                        Name = "ProductName2",                        Quantity = "4",                        Amount = new BasicAmountType                        {                            currencyID = CurrencyCodeType.USD,                            Value = "4"                        },                        Description = "ProductName2"                    });                    cartItems.Add(new PaymentDetailsItemType                    {                        Name = "Discount",                        Quantity = "1",                        Amount = new BasicAmountType                        {                            currencyID = CurrencyCodeType.USD,                            Value = "-12"                        },                        Description = "Discount"                    });                //商品详情                                      req.SetExpressCheckoutRequest = new SetExpressCheckoutRequestType            {                Version = "98.0", //版本                SetExpressCheckoutRequestDetails = new SetExpressCheckoutRequestDetailsType                {                    PaymentAction = PaymentActionCodeType.Sale,                    ReturnURL = "http://www.hao123.com/", //返回url                    CancelURL = "http://www.hao123.com/", //取消url                    //付款详情                    PaymentDetails=new PaymentDetailsType[]{                        new PaymentDetailsType{                            ItemTotal = new BasicAmountType                            {                                currencyID = CurrencyCodeType.USD,                                Value ="10"                            },                            ShippingTotal = new BasicAmountType                            {                                currencyID = CurrencyCodeType.USD,                                Value = "5"                            },                            TaxTotal = new BasicAmountType                            {                                currencyID = CurrencyCodeType.USD,                                Value = "2"                            },                            OrderTotal = new BasicAmountType                            {                                currencyID = CurrencyCodeType.USD,                                Value = "17"                            },                            PaymentDetailsItem = cartItems.ToArray()                        }                    }                }               };            //配置请求信息            SetExpressCheckoutResponseType response = service.SetExpressCheckout(req);            return response;        }

　　　　这里有几个地方要说一下：

　　　　　　第一：折扣信息是和商品写在一起的。

　　　　　　第二：价格这里，ItemTotal=商品价格+折扣价格，OrderTotal=ItemTotal+ShippingTotal+TaxTotal。这两个价格不能出错。

　　　　　　第三：这里还可以把自己的地址加进去,在detail下将AddressOverride设置成1，然后就可以在Address中添加自己想要传给PayPal的信息了。这里要注意的是，地址信息不能乱写，PayPal会验证下。这里还有个问题就是我的Name和Phone怎么也传不回

来，希望可以有人帮我解决一下，谢谢。　

　　　　　　第四：这里的ReturnUrl和CancelUrl，只用Url.Action()不行，会报错，要全地址，带http的，这里提供两中方法。

　　　　　　　　　1.　string baseUrl = Request.Url.Scheme + "://" + Request.Url.Authority;　

　　　　　　　　　　　string ReturnUrl=baseUrl+Url.Action("ReturnUrl");

　　　　　　　　　2.　Url.Action("ReturnUrl", "Test", null, "http")

 　　　　　　AddressOverride = "1",            Address = new AddressType { }

　　　　　　获取到response后，就可以取其中的Token来跳转到PayPal去了，找不到Token的看问题一。这里还是测试地址："https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=" + response.Token。

　　　　　　输入账号信息，支付，调回网站，调用GetExpressCheckout方法。　　　　　　

　　   public static GetExpressCheckoutDetailsResponseType GetExpressCheckout(string token)        {            GetExpressCheckoutDetailsReq req = new GetExpressCheckoutDetailsReq();            req.GetExpressCheckoutDetailsRequest = new GetExpressCheckoutDetailsRequestType            {                Token = token,                Version = APIVersion            };                        GetExpressCheckoutDetailsResponseType response = service.GetExpressCheckoutDetails(req);            return response;        }

　　　　　　这里将Service和APIVersion移出去，方便每一个方法调用。　　　　　　

public static PayPalAPIAASoapBinding service        {            get            {                return new PayPalAPIAASoapBinding                {                    Url = "https://api-3t.sandbox.paypal.com/nvp",                    RequesterCredentials = new CustomSecurityHeaderType                    {                        Credentials = new UserIdPasswordType                        {                            Username = "**********_api1.qq.com",                            Password = "*********",                            Signature = "************************"                        }                    }                };            }        }        public static string APIVersion        {            get            {                return "98.0";            }        }

　　　　最后将GetExpressCheckout的返回值作为DoExpressCheckout的参数，用来获取付款。　　　　　　　　

 public static DoExpressCheckoutPaymentResponseType DoExpressCheckout(GetExpressCheckoutDetailsResponseType responseGet)        {            PayerInfoType paymentInfo = responseGet.GetExpressCheckoutDetailsResponseDetails.PayerInfo;            DoExpressCheckoutPaymentReq req = new DoExpressCheckoutPaymentReq();            req.DoExpressCheckoutPaymentRequest = new DoExpressCheckoutPaymentRequestType            {                Version = APIVersion,                DoExpressCheckoutPaymentRequestDetails = new DoExpressCheckoutPaymentRequestDetailsType                {                    PaymentAction = PaymentActionCodeType.Sale,                    PaymentActionSpecified = true,                    Token = responseGet.GetExpressCheckoutDetailsResponseDetails.Token,                    PayerID = paymentInfo.PayerID,                    PaymentDetails = new PaymentDetailsType[] {                         new PaymentDetailsType{                            OrderTotal = new BasicAmountType{                                 Value = responseGet.GetExpressCheckoutDetailsResponseDetails.PaymentDetails[0].OrderTotal.Value,                                 currencyID = CurrencyCodeType.USD                            },                                                       Custom = "123",                            ButtonSource = "nopCommerceCart"                        }                    }                }            };            DoExpressCheckoutPaymentResponseType response = service.DoExpressCheckoutPayment(req);            return response;        }

　　　　这样，付款就完成了，这是一个大概的流程，中间还有一些判断错误，返回错误到页面的代码，没有写，自己加。

　　　　退款

　　　　这里需要新添加一个服务对象，参数社么的都与service一样，类型不同：PayPalAPISoapBinding service2　　　　

　　　　public static RefundTransactionResponseType RefundOrder(string transactionID)        {            RefundTransactionReq req = new RefundTransactionReq();            req.RefundTransactionRequest = new RefundTransactionRequestType {                 RefundType = RefundType.Partial,    //退款类型，是部分退款 还是 全额退款                //退款金额，全额退款的话不需要这个参数                Amount = new BasicAmountType{                                currencyID = CurrencyCodeType.USD,                    Value = "100"                },                                        RefundTypeSpecified = true,                Version = APIVersion,                //付款单的 transactionID                TransactionID = transactionID                            };            RefundTransactionResponseType response = service2.RefundTransaction(req);            return response;        }

　　　　信用卡付款

　　　　　　这里不是很清楚，大概说一下，有待改进。信用卡付款这里，不需要跳转到PayPal支付页面去登录，在本站就可以进行付款。这里用的是PayPal Direct Payment API。　　　　　　

　　　　public static DoDirectPaymentResponseType DirectPayment()        {            DoDirectPaymentRequestDetailsType details = new DoDirectPaymentRequestDetailsType            {                //IPAddress  这里填什么？？                IPAddress = "127.0.0.1",                //信用卡信息                CreditCard = new CreditCardDetailsType                {                    CreditCardNumber = "****96548042****",                    CreditCardType = CreditCardTypeType.Visa,                    ExpMonthSpecified = true,                    ExpMonth = 2,                    ExpYearSpecified = true,                    ExpYear = 2018,                    CVV2 = "234",                    CreditCardTypeSpecified = true,                    CardOwner = new PayerInfoType                    {                        PayerCountry = CountryCodeType.US,                        Address = new AddressType                        {                            CountrySpecified = true,                            Street1 = "Street1",                            Street2 = "Street2",                            CityName = "City",                            StateOrProvince = "CA",                            Country = CountryCodeType.US,                            PostalCode = "Zip"                        },                        Payer = "",                        PayerName = new PersonNameType                        {                            FirstName = "FirstName",                            LastName = "LastName"                        }                    }                },                //支付 详情                PaymentDetails = new PaymentDetailsType                {                    OrderTotal = new BasicAmountType                    {                        Value = "100",                        currencyID = CurrencyCodeType.USD                    },                    Custom = "123",                    ButtonSource = "nopCommerceCart",                    ShipToAddress = new AddressType {                         Name = "Name",                                          Street1 = "Street1",                        CityName = "City",                        StateOrProvince = "State",                        PostalCode = "Zip",                        Country = CountryCodeType.US,                        CountrySpecified = true                    }                },                                 PaymentAction=PaymentActionCodeType.Sale            };            DoDirectPaymentReq req = new DoDirectPaymentReq();            req.DoDirectPaymentRequest = new DoDirectPaymentRequestType            {                Version = APIVersion,                DoDirectPaymentRequestDetails = details            };            DoDirectPaymentResponseType response = service.DoDirectPayment(req);            return response;        }

　　　　问题一：

　　　　SetExpressCheckout下执行后的SetExpressCheckoutResponseType response，response.Token没有值。

　　Answer：找到wcf引用中的下面代码：

　　　　[System.Xml.Serialization.XmlElementAttribute(Order=6)]
        public System.Xml.XmlElement Any {
            get {
                return this.anyField;
            }
            set {
                this.anyField = value;
                this.RaisePropertyChanged("Any");
            }
        }

　　　　将[System.Xml.Serialization.XmlElementAttribute(Order=6)]替换成[System.Xml.Serialization.XmlIgnoreAttribute()]

　　API开发网址：http://www.paypalobjects.com/en_US/ebook/PP_APIReference/dcc.html

　　　　　　　　http://www.codeproject.com/Articles/42894/Introduction-to-PayPal-for-C-ASP-NET-developers#DirectPayment

标签: response.Token

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