貝寶PDT與C＃

Question

我試圖實施一個購物車跟蹤系統使用pdt與C＃。 我遇到的麻煩是找到一個貝寶成功回發的例子，特別是在多個項目的情況下！ 任何幫助不勝感激（有些代碼會好得多：D）！ 謝謝

Answer 1

我相信這本書有一些很好的例子。

http://www.amazon.com/Beginning-ASP-NET-E-Commerce-2005-ebook/dp/B001JEPVVE/ref=sr_1_2?ie=UTF8&s=digital-text&qid=1268249356&sr=8-2

Answer 2

下面的代碼解析PDT響應：

using System; 
using System.Collections.Generic; 
using System.Collections.Specialized; 
using System.Configuration; 
using System.Globalization; 
using System.Net; 
using System.IO; 
using System.Text; 

namespace PayPal 
{ 
    public static class PaymentDataTransfer 
    { 
     private const string AppSetting_Identity = "PayPal.PaymentDataTransfer.Identity"; 
     private const string AppSetting_ServiceUrl = "PayPal.PaymentDataTransfer.ServiceUrl"; 

     public class TransactionStatus 
     { 
      public bool Success { get; set; } 
      public int ErrorCode { get; set; } 
      public NameValueCollection Parameters { get; set; } 

      public float PaymentGross { get; set; } 
      public string Currency { get; set; } 

      public string Invoice { get; set; } 
      public PayerInformation Payer { get; set; } 
      public CartItem[] CartItems; 
     } 

     public class PayerInformation 
     { 
      public string FirstName { get; set; } 
      public string LastName { get; set; } 
      public string Email { get; set; } 
     } 

     public class CartItem 
     { 
      public int Number { get; set; } 
      public string Name { get; set; } 
      public int Qunatity { get; set; } 
      public float GrossPrice { get; set; } 
     } 

     public static TransactionStatus GetTransactionStatus(string transactionToken) 
     { 
      return GetTransactionStatus(transactionToken, false); 
     } 

     public static TransactionStatus GetTransactionStatus(string transactionToken, bool sandbox) 
     { 

#if ParsingTest 
      string response = 
       @"SUCCESS 
mc_gross=1100.00 
invoice=334354 
protection_eligibility=Eligible 
address_status=confirmed 
item_number1=1 
tax=0.00 
item_number2=2 
payer_id=DSFSDFSDFSDF 
address_street=1+Main+St 
payment_date=04%3A13%3A49+Oct+20%2C+2011+PDT 
payment_status=Completed 
charset=windows-1252 
address_zip=95131 
mc_shipping=0.00 
mc_handling=0.00 
first_name=Test 
mc_fee=32.20 
address_country_code=US 
address_name=Test+User 
custom= 
payer_status=verified 
business=yourbusiness%40business.com 
address_country=United+States 
num_cart_items=2 
mc_handling1=0.00 
mc_handling2=0.00 
address_city=San+Jose 
payer_email=payer_email%40business.com 
mc_shipping1=0.00 
mc_shipping2=0.00 
txn_id=0SDFSDFSDFSDFD 
payment_type=instant 
last_name=User 
address_state=CA 
item_name1=First+test+item 
receiver_email=yourbusiness%40business.com 
item_name2=Second+test+item 
payment_fee=32.20 
quantity1=1 
quantity2=1 
receiver_id=SDFGDFGDFGDFDFG 
txn_type=cart 
mc_gross_1=1000.00 
mc_currency=USD 
mc_gross_2=100.00 
residence_country=US 
transaction_subject=Shopping+Cart 
payment_gross=1100.00"; 

#else 
      string authToken = GetAppSetting(AppSetting_Identity, sandbox); 
      string serviceUrl = GetAppSetting(AppSetting_ServiceUrl, sandbox); 
      string query = string.Format("cmd=_notify-synch&tx={0}&at={1}", transactionToken, authToken); 

      HttpWebRequest request = (HttpWebRequest)WebRequest.Create(serviceUrl); 

      request.Method = "POST"; 
      request.ContentType = "application/x-www-form-urlencoded"; 
      request.ContentLength = query.Length; 

      using (var requestStreamWriter = new StreamWriter(request.GetRequestStream(), Encoding.ASCII)) 
      { 
       requestStreamWriter.Write(query); 
       requestStreamWriter.Close(); 
      } 

      string response; 

      // Do the request to PayPal and get the response 
      using(StreamReader stIn = new StreamReader(request.GetResponse().GetResponseStream())) 
      { 
       response = stIn.ReadToEnd(); 
       stIn.Close(); 
      } 
#endif 

      string[] lines = response.Split(new []{"\n", "\r\n"}, StringSplitOptions.None); // splitting up by line breaks 

      var result = new TransactionStatus 
          { 
           Success = lines[0] == "SUCCESS", 
           Parameters = new NameValueCollection() 
          }; 

      for(int i=1; i < lines.Length; i++) 
      { 
       string line = lines[i]; 

       string[] keyValuePair = lines[i].Split(new [] {'='}); 

       if(keyValuePair.Length == 2) 
       { 
        result.Parameters.Add(UrlDecode(keyValuePair[0]), UrlDecode(keyValuePair[1])); 
       } 
       else 
       { 
        const string errorCodePrefix = "Error:"; 

        if(line.StartsWith(errorCodePrefix)) 
        { 
         result.ErrorCode = Int32.Parse(line.Substring(errorCodePrefix.Length)); 
        } 
       } 
      } 

      if(result.Success) 
      { 
       result.Invoice = result.Parameters["invoice"]; 

       result.Payer = new PayerInformation 
            { 
             FirstName = result.Parameters["first_name"], 
             LastName = result.Parameters["last_name"], 
             Email = result.Parameters["payer_email"] 
            }; 

       float paymentGross; 
       result.PaymentGross = float.TryParse(result.Parameters["mc_gross"], 
             NumberStyles.Float, 
             CultureInfo.InvariantCulture, 
             out paymentGross) ? paymentGross : 0.0f; 

       result.Currency = result.Parameters["mc_currency"]; 

       int cartItemsNumber; 
       if (int.TryParse(result.Parameters["num_cart_items"], out cartItemsNumber) && cartItemsNumber > 0) 
       { 
        var cartItems = new List<CartItem>(); 

        for(int i=1; i <= cartItemsNumber; i++) 
        { 
         cartItems.Add(new CartItem 
              { 
               Number = int.Parse(result.Parameters["item_number" + i], CultureInfo.InvariantCulture), 
               Name = result.Parameters["item_name" + i], 
               Qunatity = int.Parse(result.Parameters["quantity" + i], CultureInfo.InvariantCulture), 
               GrossPrice = float.Parse(result.Parameters["mc_gross_" + i], CultureInfo.InvariantCulture) 
              }); 
        } 

        result.CartItems = cartItems.ToArray(); 
       } 
      } 

      return result; 
     } 

     private static string UrlDecode(string encodedText) 
     { 
      return Uri.UnescapeDataString(encodedText.Replace("+", " ")); 
     } 

     private static string GetAppSetting(string settingName, bool sandbox) 
     { 
      return ConfigurationManager.AppSettings[settingName + (sandbox ? "_sandbox" : string.Empty)]; 
     } 
    } 
} 

配置部分從web.config中：

<appSettings> 
    ..... 

    <!-- PayPal --> 
    <add key="PayPal.PaymentDataTransfer.Identity" value="....." /> 
    <add key="PayPal.PaymentDataTransfer.Identity_sandbox" value="....." /> 
    <add key="PayPal.PaymentDataTransfer.ServiceUrl" value="https://www.paypal.com/cgi-bin/webscr" /> 
    <add key="PayPal.PaymentDataTransfer.ServiceUrl_sandbox" value="https://www.sandbox.paypal.com/cgi-bin/webscr" /> 
</appSettings>