Hi,

Im new to paypal dev.I have two sandbox account one for buyer and seller..Both are verified a/c. and i created a buy now button in that i mention succuess page url and faliure page url.when buyer a/c paid amount and return back to my page i check IPN staus its always INVAILDS.

Here i my coded

string strSandbox = "https://www.sandbox.paypal.com/cgi-bin/webscr";

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

//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);
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
}
else if (strResponse == "INVALID")
{
//log for manual investigation
}
else
{
//log response/ipn data for manual investigation
}

can any one help me.. whats went wrong?

Thanks in adv:)

S test tranactions is going thr sandbox only ...i deleted all test a/c and created new and tested but still returns invaild..Please help..( i am testing it in LocalHost..)