PayPal 教程缺少参考资料？

Question

尝试关注PayPal .NET tutorial on GitHub。

我已尽我所能修复它，但仍然遇到很多与缺少功能等相关的错误。这是我目前所遇到的：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using PayPal.Api;
using System.Configuration;
using PayPal.Sample.Utilities;
using System.Web.Providers.Entities;

/// <summary>
/// Summary description for OAuthTokenCredential
/// </summary>
public class CredentialManager
{
    Dictionary<string, string> _Config = null;
    string _AccessToken = string.Empty;
    APIContext _APIConText = null;


    public CredentialManager()
    {
        // Get a reference to the config
        var config = ConfigManager.Instance.GetProperties();
        _Config = config;

        // Use OAuthTokenCredential to request an access token from PayPal
        var accessToken = new OAuthTokenCredential(config).GetAccessToken();
        _AccessToken = accessToken;

        //API Context
        var apiContext = new APIContext(accessToken);
        _APIConText = apiContext;

        // Initialize the apiContext's configuration with the default configuration for this application.
        apiContext.Config = ConfigManager.Instance.GetProperties();

        // Define any custom configuration settings for calls that will use this object.
        apiContext.Config["connectionTimeout"] = "1000"; // Quick timeout for testing purposes

        // Define any HTTP headers to be used in HTTP requests made with this APIContext object
        //if (apiContext.HTTPHeaders == null)
        //{
        //    apiContext.HTTPHeaders = new Dictionary<string, string>();
        //}
        //apiContext.HTTPHeaders["some-header-name"] = "some-value"; 
    }    

    public Payment GetPAyment(APIContext apiContext, string paymentid)
    {
        var payment = Payment.Get(apiContext, paymentid);

        return payment;
    }

    public bool CreatePayment()
    {
        try
        {
            bool Success = false;
            //var apiContext = Configuration.GetAPIContext();
            string payerId = Request.Params["PayerID"];

            if (string.IsNullOrEmpty(payerId))
            {
                var itemList = new ItemList()
                {
                    items = new List<Item>()
                    {
                        new Item()
                        {
                            name = "Item Name",
                            currency = "USD",
                            price = "15",
                            quantity = "5",
                            sku = "sku"
                        }
                    }
                };
                var payer = new Payer() { payment_method = "paypal" };
                var baseURI = Request.Url.Scheme + "://" + Request.Url.Authority + "/PaymentWithPayPal.aspx?";
                var guid = Convert.ToString((new Random()).Next(100000));
                var redirectUrl = baseURI + "guid=" + guid;
                var redirUrls = new RedirectUrls()
                {
                    cancel_url = redirectUrl + "&cancel=true",
                    return_url = redirectUrl
                };
                var details = new Details()
                {
                    tax = "15",
                    shipping = "10",
                    subtotal = "75"
                };
                var amount = new Amount()
                {
                    currency = "USD",
                    total = "100.00", // Total must be equal to sum of shipping, tax and subtotal.
                    details = details
                };
                var transactionList = new List<Transaction>();

                transactionList.Add(new Transaction()
                {
                    description = "Transaction description.",
                    invoice_number = Common.GetRandomInvoiceNumber(),
                    amount = amount,
                    item_list = itemList
                });

                var payment = new Payment()
                {
                    intent = "sale",
                    payer = payer,
                    transactions = transactionList,
                    redirect_urls = redirUrls
                };
                var createdPayment = payment.Create(_APIConText);
                var links = createdPayment.links.GetEnumerator();
                while (links.MoveNext())
                {
                    var link = links.Current;
                    if (link.rel.ToLower().Trim().Equals("approval_url"))
                    {
                        this.flow.RecordRedirectUrl("Redirect to PayPal to approve the payment...", link.href);
                    }
                }
                Session.Add(guid, createdPayment.id);
                Session.Add("flow-" + guid, this.flow);
            }
            else
            {
                var guid = Request.Params["guid"];
                var paymentId = Session[guid] as string;
                var paymentExecution = new PaymentExecution() { payer_id = payerId };
                var payment = new Payment() { id = paymentId };
                var executedPayment = payment.Execute(apiContext, paymentExecution);
            }
            return Success;
        }
        catch(Exception ex)
        {
            return false;
        }
    }
}

我在以下方面遇到随机错误：

using PayPal.Sample.Utilities;
string payerId = Request.Params["PayerID"];
var baseURI = Request.Url.Scheme + "://" + Request.Url.Authority + "/PaymentWithPayPal.aspx?";
invoice_number = Common.GetRandomInvoiceNumber(),   
Session.Add(guid, createdPayment.id);
Session.Add("flow-" + guid, this.flow);
var guid = Request.Params["guid"];
var paymentId = Session[guid] as string;
var executedPayment = payment.Execute(_APIConText, paymentExecution);

错误：

• “请求”不存在
• “通用”不存在
• “流”不存在
• “会话”在其当前类型中无效

我想我只是缺少参考或其他东西。我正在尝试为 C# ASP .Net（不是 MVC）做这件事

Answer 1

你会发现“普通”类here

Common.GetRandomInvoiceNumber() 只是生成一个随机数。我认为您只需将其替换为您自己生成的发票编号即可。