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POPaypal IPN Listener not returning values
 

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    <p>I am trying to create a IPN listener in C# MVC website. After looking online, I have managed to create the ActionResult below. </p> <p>The listener receives a "VERIFIED" response, but unfortunately it does not seems to be receiving any other information about the payment.</p> <pre><code> [HttpPost] public ActionResult IPN() { var log = new LogMessage(); log.LogMessageToFile("IPN recieved!"); var formVals = new Dictionary&lt;string, string&gt;(); formVals.Add("cmd", "_notify-validate"); string response = GetPayPalResponse(formVals, true); if (response == "VERIFIED") { log.LogMessageToFile("IPN VERIFIED!"); //validate the order string sAmountPaid = Request.QueryString["amt"]; string sPayment = ConfigurationManager.AppSettings["amount"].ToString(); Decimal amountPaid = 0; Decimal Payment = 0; Decimal.TryParse(sAmountPaid, out amountPaid); Decimal.TryParse(sPayment, out Payment); if (Payment &lt;= amountPaid) { log.LogMessageToFile("IPN Correct amount"); //process it try { string GUID = Request.QueryString["cm"]; string strGatewayResponse = Request.QueryString["tx"]; var data = new Datalayer(); data.AddPayment(GUID, amountPaid, strGatewayResponse, true); log.LogMessageToFile("IPN Commplete"); return Redirect("/Payment/Success"); } catch { log.LogMessageToFile("IPN Error"); return Redirect("/Payment/Error"); } } else { log.LogMessageToFile("IPN Incorrect amount!"); log.LogMessageToFile("IPN amount:" + Request.QueryString["payment_gross"]); log.LogMessageToFile("IPN GUID:" + Request.QueryString["custom"]); log.LogMessageToFile("IPN ID:" + Request.QueryString["txn_id"]); return Redirect("/Payment/Error"); } } log.LogMessageToFile("IPN not verified!"); return View("/Payment/Error"); } string GetPayPalResponse(Dictionary&lt;string, string&gt; formVals, bool useSandbox) { string paypalUrl = useSandbox ? "https://www.sandbox.paypal.com/cgi-bin/webscr" : "https://www.paypal.com/cgi-bin/webscr"; HttpWebRequest req = (HttpWebRequest)WebRequest.Create(paypalUrl); // Set values for the request back req.Method = "POST"; req.ContentType = "application/x-www-form-urlencoded"; byte[] param = Request.BinaryRead(Request.ContentLength); string strRequest = Encoding.ASCII.GetString(param); StringBuilder sb = new StringBuilder(); sb.Append(strRequest); foreach (string key in formVals.Keys) { sb.AppendFormat("&amp;{0}={1}", key, formVals[key]); } strRequest += sb.ToString(); req.ContentLength = strRequest.Length; string response = ""; using (StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII)) { streamOut.Write(strRequest); streamOut.Close(); using (StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream())) { response = streamIn.ReadToEnd(); } } return response; } </code></pre> <p>I am most likely missing something very simple.</p> <p>Any help would be amazing.</p>
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