Question

为什么当我从我的localhost将用户重定向到PAYPAL的沙箱（https://www.sandbox.paypal.com）然后返回到.aspx页面（successful.aspx）后，它会丢失会话，

e.g。 SESSION [“tempUser”]，它适用于所有页面但不在Successful.aspx页面上，它返回null，我正在处理此错误2周，但没有进展，我试过不同的浏览器，甚至不同的系统，改变了一些代码，但没有任何帮助，它已经过了1个月+并且在几个表格上几个帖子之后，甚至没有任何帮助饼干有同样的问题，返回时返回null，我之前的帖子。

重定向页面代码：

<body>
    <form id="form1" runat="server">
<div>
 <h4> Congrats <b> <%# Session["tempSubAdminName"]%>  </b>, Your basic informaton has been submitted , For full activation you need to pay via paypal. Please click the PayPal icon given below. </h4>
</div>
<div>
 <asp:HyperLink ID="homeBtnImage" runat="server" ImageUrl="~/btnPayPal.gif"
      NavigateUrl= "https://www.sandbox.paypal.com/us/cgi-bin/webscr?cmd=_xclick&business=smile2_1355775057_biz@yahoo.com&item_name=MemberShip&amount=20&currency=USD&return=http://127.0.0.1:57135/Online%20Recruitment%20System-Final/paymentSuccessful.aspx?emailAdmin='1234' &cancel_return=https://www.google.com/" >PayPal</asp:HyperLink>
</div>
<h6>Or if you don't have paypal account, click <asp:HyperLink ID="paypalSite" runat="server"
    NavigateUrl="https://www.sandbox.paypal.com/" >here</asp:HyperLink> </h6>
</form>

如果成功，请回到这个年龄

</head>
 <body>
   <form id="form1" runat="server">
   <div>
     <h5> Dear <%# Session["tempSubAdmin"] %>, You have successfully registered ,   Please wait for the approval by admin. </h5>
</div>
</form>

Answer 1

我正在解释我实施的方式。它可能因人而异。

首先，您必须在developer paypal api上创建一个帐户。帐户。
然后创建两个测试帐户，一个用于客户，另一个用于商业（商家）。

在 web.config 文件中声明这些值。

 <appSettings>    
    <!--these keys are for Paypal-->
    <add key="paypalURL" value="https://www.sandbox.paypal.com" />
    <add key="paypalAccount" value="arshad_Mer_biz@gmail.com" />
    <add key="websiteUrl" value="http://www.yourstie.com" />
  </appSettings>

现在您必须相应地设置paypal html变量，详细信息Paypal variables

在 button_click 事件

中编写以下代码

string redirectUrl = ConfigurationManager.AppSettings["paypalURL"]+"/cgi-bin/webscr?cmd=_xclick";
string sellersEmail = "&business=";
string buyersEmail = "&email=";
string productName = "&item_name=";
string amount = "&amount=";
string shippingOption = "&no_shipping=";
string noteOpton = "&no_note=";
string returnUrl = "&return=";
string cancelUrl = "&cancel_return=";
string rmOption = "&rm=";
string notifyUrl = "&notify_url=";
string custom = "&custom=";

// Merchant account
sellersEmail += ConfigurationManager.AppSettings["paypalAccount"];

//calling a method that will return current user email id.
buyersEmail += GeneralClass.GetUserEmail();

//optional value if you want to carry
custom += GeneralClass.GetUseriD();

productName += lblProdeutName.Text;
amount +=lblAmount.Text ;

shippingOption += "1";                      //1 means no shipping option;
noteOpton += "1";                           //1 means no note option;
rmOption += "1";                            

returnUrl +=ConfigurationManager.AppSettings["websiteUrl"]+"/PaypalThankYou.aspx";
cancelUrl +=ConfigurationManager.AppSettings["websiteUrl"] + "/PaypalCancel.aspx";
notifyUrl += ConfigurationManager.AppSettings["websiteUrl"] + "/PaypalNotifyUrl.aspx";

redirectUrl += sellersEmail + buyersEmail + productName + amount + shippingOption +    noteOpton + returnUrl + cancelUrl + notifyUrl + rmOption + custom;
Response.Redirect(redirectUrl);

取消页面： - 如果用户从paypal取消交易，也适用于localhost 感谢您的页面：付款后，paypal将重定向到该页面通知网址：有时它叫IPN（即时付款通知）。这是您从paypal获得价值的地方。它只适用于托管页面。 它不适用于localhost

Notifyurl 页面的代码
添加这些namespaces：

 using System.Net;
 using System.IO;
 using System.Text;
 using System.Collections.Specialized;

page_load

：

  protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
         //Post back to either sandbox or live
        string strURL =ConfigurationManager.AppSettings["paypalURL"]+ "/cgi-bin/webscr";

        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(strURL);

        //Set values for the request back
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";
        byte[] param = Request.BinaryRead(HttpContext.Current.Request.ContentLength);
        string strRequest =Encoding.ASCII.GetString(param);
        string strResponse_copy = strRequest;  //Save a copy of the initial info sent by PayPal
        strRequest += "&cmd=_notify-validate";
        req.ContentLength = strRequest.Length;

        //for proxy
        //WebProxy proxy = new WebProxy(new Uri("http://url:port#"));
        //req.Proxy = proxy;
        //Send the request to PayPal and get the response

        StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
        streamOut.Write(strRequest);
        streamOut.Close();
        StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
        string strResponse = streamIn.ReadToEnd();
        streamIn.Close();

        if (strResponse == "VERIFIED")
        {
            //check the payment_status is Completed
            //check that txn_id has not been previously processed
            //check that receiver_email is your Primary PayPal email
            //check that payment_amount/payment_currency are correct
            //process payment
            // pull the values passed on the initial message from PayPal

            NameValueCollection these_argies = HttpUtility.ParseQueryString(strResponse_copy);

            string pay_stat = these_argies["payment_status"];

            //.
            //.  more args as needed look at the list from paypal IPN doc
            //.


            if (pay_stat.Equals("Completed"))
            {
            //inserting the database
                int intUserID;
                int.TryParse(these_argies["custom"],out intUserID);
                objUserEntity.UserID=intUserID;
                objPapalPayment.strTransactionID = these_argies["txn_id"];
                objPapalPayment.dblPaymentAmount = Convert.ToDouble(these_argies["payment_gross"]);
                objPapalPayment.strBuyerMail = these_argies["payer_email"];
                objPapalPayment.dtmDateAppliedOn = DateTime.Now;
                objPapalPayment.blnIsGlobalAdvertisement = true;
                objSubscription.blnIsPaid = false;
                objSubscription.blnSubscriptionWithHeld = true;
                objUserFunction.AddPaypalPayment(objUserEntity, objPapalPayment, objSubscription, enmSubscriptionType.Global);                         
            }


            // more checks needed here specially your account number and related stuff
        }
        else if (strResponse == "INVALID")
        {
            //log for manual investigation
        }
        else
        {
            //log response/ipn data for manual investigation
        }
        }
    }

那么你将如何在localhost上调试？使用rm value = 2;并在thankyou页面的page_load事件中粘贴相同的代码。它会起作用。

了解更多详情： http://www.codeproject.com/Articles/42894/Introduction-to-PayPal-for-C-ASP-NET-developers
Paypal variables and its usage
希望，它会帮助你。

Answer 2

我认为您正在本地计算机上测试它。

在重定向之前检查cookie ASP.NET_SessionId的值。

然后在调用successful.aspx后检查值。

如果Cookie丢失：Paypal无法对您的Cookie执行任何操作。它只能在同一个域（locahost）上更改。

我会在没有paypal的情况下测试这个：只需要一个简单的页面重定向到你的successful.aspx。如果cookie丢失，您可能配置了非常短的会话超时或运行了一些删除cookie的代码（检入global.asax）

沙盒重定向破坏会话

2 个答案: