ipnhandler.aspx.cs

一个很好的网上购物系统！进行了新的修改具有很多的功能！

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.IO;

public partial class IPNHandler : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string ppTX = Request.Form["txn_id"].ToString();
        string sOrderID = Request.Form["custom"].ToString();
        string sAmount = Request.Form["mc_gross"].ToString();
        string status = Request.Form["payment_status"].ToString();

        //log the incoming IPN
        Log.Write("IPN", "消息", "订单： " + sOrderID, sOrderID, "");
        //all we need at this point is the SUCCESS flag
        if (VerifyIPN()) {
            //get the amount
            if (sAmount != string.Empty) {

                double dPaidFor = double.Parse(sAmount);

                //make sure the totals add up
                int orderID = Convert.ToInt16(sOrderID);
                Order order = OrdersManager.GetOrderByID(orderID);

                double dTotal = order.OrderSubTotal + order.Tax + order.Shipping;
                if (dTotal >= dPaidFor) {
                    OrdersManager.CommitOrder(orderID, ppTX);
                    Log.Write("IPN", "消息", "订单 " + sOrderID, sOrderID, order.UserName);

                    //if your PayPal account is setup to accept eChecks, 
                    //the payment will come back with a status of "Pending"
                    //if it's pending, mark the order as such
                    //the IPN will fire the order when the check clears
                    if (status.ToLower().Equals("pending")) {
                        OrdersManager.UpdateStatus(orderID, OrdersManager.WAITING_ON_PAYPAL_PAYMENT_ID);

                    }
                } else {
                    //set as invalid
                    OrdersManager.UpdateStatus(orderID, OrdersManager.INVALID_TOTALS_DONT_MATCH);
                    Log.Write("IPN", "警告", "订单无效 " + sOrderID, sOrderID, order.UserName);

                    //TODO: Send an email to notify customer as well as store owner of an Invalid Payment

                }

            }
        }

    }
    bool VerifyIPN() {
        string strFormValues = Request.Form.ToString();
        string strNewValue;
        string strResponse;
        string serverURL = "";

        if (SiteConfiguration.UseSandbox) {
            serverURL = "https://www.sandbox.paypal.com/cgi-bin/webscr";
        } else {
            serverURL = "https://www.paypal.com/cgi-bin/webscr"; ;
            //serverURL="http://www.eliteweaver.co.uk/cgi-bin/webscr ";
        }
        // Create the request back
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(serverURL);

        // Set values for the request back
        req.Method = "POST";
        req.ContentType = "application/x-www-form-urlencoded";
        strNewValue = strFormValues + "&cmd=_notify-validate";
        req.ContentLength = strNewValue.Length;

        // Write the request back IPN strings
        StreamWriter stOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
        stOut.Write(strNewValue);
        stOut.Close();

        // Do the request to PayPal and get the response
        StreamReader stIn = new StreamReader(req.GetResponse().GetResponseStream());
        strResponse = stIn.ReadToEnd();
        stIn.Close();


        // Confirm whether the IPN was VERIFIED or INVALID. If INVALID, just ignore the IPN
        return strResponse == "VERIFIED";
        
    }

}