Braintree PayPal 支付网关开发（二）

开发准备在上篇文章已经介绍 >>看这里 << 这篇文章说下Demo示例。

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1. 开发流程图这里再贴一下（很重要）：

2. 前端页面
    2.1 代码

    

        

            PayPal支付SandBox演示
        
        

        

            

                


                
                    Amount:
                    
                
            

            
            
            

                

                Shipping   Address

                

                FirstName:  

                LastName:   

                Email:  

                City:      

                Line1:  

                Line2:  

                PostalCode:  


                
            
        
    

      2.2 选择PayPal支付后，JS提交支付信息给BratinTree服务器获取nonce及相关信息，页面如下：

      2.3 JS中获取nonce及相关信息调试截图如下：

      2.4 这里确认信息后选择PayPal支付，会转到后端去进行支付操作。

3. 后端
    3.1 PayPalController

public class PayPalController : Controller
    {
        PayPalAPI payPalAPI = new PayPalAPI();
        public ActionResult Index()
        {
            return View();
        }

        //获取TOKEN
        public string GetPayPalClienToken()
        {
            ViewBag.ClientToken = payPalAPI.GetPayPalClientToken();
            return payPalAPI.GetPayPalClientToken();
        }

        public string SendNonce()
        {
            decimal amount=0.0m;
            //获取收货地址信息
            ShippingAddress shippingAddress = new ShippingAddress();
            try
            {
                amount =Convert.ToDecimal(Request["amount"]);
                shippingAddress = new ShippingAddress {
                    FirstName = Request["FirstName"],
                    LastName= Request["LastName"],
                    Email= Request["Email"],
                    City= Request["City"],
                    Line1= Request["Line1"],
                    Line2= Request["Line2"],
                    PostalCode= Request["PostalCode"]
                };
            }
            catch (FormatException e)
            {               
                return e.Message;
            }

            //获取nonce
            var nonce = Request["payment_method_nonce"];
            return payPalAPI.SendNonce(amount, nonce, shippingAddress);
        }
    }

        3.2 PayPalAPI

public class PayPalAPI
    {
        #region Files
        private string Environment { get; set; }
        private string MerchantId { get; set; }
        private string PublicKey { get; set; }
        private string PrivateKey { get; set; }
        #endregion

        //Create Braintree Gateway Braintree网关初始化
        public BraintreeGateway CreateGateway()
        {
            Environment = System.Environment.GetEnvironmentVariable("BraintreeEnvironment");
            MerchantId = System.Environment.GetEnvironmentVariable("BraintreeMerchantId");
            PublicKey = System.Environment.GetEnvironmentVariable("BraintreePublicKey");
            PrivateKey = System.Environment.GetEnvironmentVariable("BraintreePrivateKey");

            if (MerchantId == null || PublicKey == null || PrivateKey == null)
            {
                Environment = ConfigurationManager.AppSettings["BraintreeEnvironment"];
                MerchantId = ConfigurationManager.AppSettings["BraintreeMerchantId"];
                PublicKey = ConfigurationManager.AppSettings["BraintreePublicKey"];
                PrivateKey = ConfigurationManager.AppSettings["BraintreePrivateKey"];
            }
            return new BraintreeGateway(Environment, MerchantId, PublicKey, PrivateKey);
        }

        //Get PayPal TOKEN
        public string GetPayPalClientToken()
        {
            BraintreeGateway gateway = CreateGateway();
            string ClientToken = gateway.ClientToken.Generate();
            return ClientToken;
        }

        //支付
        public string SendNonce(decimal amount, string nonce, ShippingAddress shippingAddress)
        {
            BraintreeGateway gateway = CreateGateway();
            var request = new TransactionRequest
            {
                Amount = amount,
                PaymentMethodNonce = nonce,
                Options = new TransactionOptionsRequest
                {
                    SubmitForSettlement = true
                },
                ShippingAddress = new AddressRequest
                {
                    FirstName = shippingAddress.FirstName,
                    LastName = shippingAddress.LastName,
                    PostalCode= shippingAddress.PostalCode,
                    StreetAddress= shippingAddress.Line1+ shippingAddress.Line2,
                }
            };
            //网关支付
            Result result = gateway.Transaction.Sale(request);
            //支付成功
            if (result.IsSuccess())
            {
                Transaction transaction = result.Target;
            }
            else if (result.Transaction != null)
            {
                return "Transaction is null,Id=" + result.Transaction.Id;
            }
            else
            {
                string errorMessages = "";
                foreach (ValidationError error in result.Errors.DeepAll())
                {
                    errorMessages += "Error: " + (int)error.Code + " - " + error.Message + "\n";
                }
                return errorMessages;
            }
            return "支付完成！";
        }
    }

4. 整体流程

5. Braintree sandbox中的交易记录：

6. 源码：https://github.com/wangqilong1225/BratinTree_PayPal_Demo