protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
// Verify user has completed the checkout process.
if ((string)Session["userCheckoutCompleted"] != "true")
{
Session["userCheckoutCompleted"] = string.Empty;
Response.Redirect("CheckoutError.aspx?" + "Desc=Unvalidated%20Checkout.");
}
PayPalApi payPalCaller = new PayPalApi();
string retMsg = "";
string token = "";
string finalPaymentAmount = "";
string PayerID = "";
NVPCodec decoder = new NVPCodec();
token = Session["token"].ToString();
PayerID = Session["payerId"].ToString();
finalPaymentAmount = Session["payment_amt"].ToString();
bool ret = payPalCaller.DoCheckoutPayment(finalPaymentAmount, token, PayerID, ref decoder, ref retMsg);
if (ret)
{
// Retrieve PayPal confirmation value.
string PaymentConfirmation = decoder["PAYMENTINFO_0_TRANSACTIONID"].ToString();
// Clear order id.
Session["currentOrderId"] = string.Empty;
}
else
{
Response.Redirect("CheckoutError.aspx?" + retMsg);
}
}
}
private string buildCredentialsNVPString()
{
NVPCodec codec = new NVPCodec();
if (!IsEmpty(APIUsername))
codec["USER"] = APIUsername;
if (!IsEmpty(APIPassword))
codec[PWD] = APIPassword;
if (!IsEmpty(APISignature))
codec[SIGNATURE] = APISignature;
if (!IsEmpty(Subject))
codec["SUBJECT"] = Subject;
codec["VERSION"] = "88.0";
return codec.Encode();
}
public bool GetCheckoutDetails(string token, ref string PayerID, ref NVPCodec decoder, ref string retMsg)
{
if (bSandbox)
{
pEndPointURL = pEndPointURL_SB;
}
NVPCodec encoder = new NVPCodec();
encoder["METHOD"] = "GetExpressCheckoutDetails";
encoder["TOKEN"] = token;
string pStrrequestforNvp = encoder.Encode();
string pStresponsenvp = HttpCall(pStrrequestforNvp);
decoder = new NVPCodec();
decoder.Decode(pStresponsenvp);
string strAck = decoder["ACK"].ToLower();
if (strAck != null && (strAck == "success" || strAck == "successwithwarning"))
{
PayerID = decoder["PAYERID"];
return true;
}
else
{
retMsg = "ErrorCode=" + decoder["L_ERRORCODE0"] + "&" +
"Desc=" + decoder["L_SHORTMESSAGE0"] + "&" +
"Desc2=" + decoder["L_LONGMESSAGE0"];
return false;
}
}
public bool ShortcutExpressCheckout(string amt, ref string token, ref string retMsg)
{
if (bSandbox)
{
pEndPointURL = pEndPointURL_SB;
host = host_SB;
}
string returnURL = "http://localhost:50298/User/CheckoutReview.aspx";
string cancelURL = "http://localhost:50298/User/CheckoutCancel.aspx";
NVPCodec encoder = new NVPCodec();
encoder["METHOD"] = "SetExpressCheckout";
encoder["RETURNURL"] = returnURL;
encoder["CANCELURL"] = cancelURL;
encoder["BRANDNAME"] = "Nelo Lodging";
encoder["PAYMENTREQUEST_0_AMT"] = amt;
encoder["PAYMENTREQUEST_0_ITEMAMT"] = amt;
encoder["PAYMENTREQUEST_0_PAYMENTACTION"] = "Sale";
encoder["PAYMENTREQUEST_0_CURRENCYCODE"] = "USD";
string pStrrequestforNvp = encoder.Encode();
string pStresponsenvp = HttpCall(pStrrequestforNvp);
NVPCodec decoder = new NVPCodec();
decoder.Decode(pStresponsenvp);
string strAck = decoder["ACK"].ToLower();
if (strAck != null && (strAck == "success" || strAck == "successwithwarning"))
{
token = decoder["TOKEN"];
string ECURL = "https://" + host + "/cgi-bin/webscr?cmd=_express-checkout" + "&token=" + token;
retMsg = ECURL;
return true;
}
else
{
retMsg = "ErrorCode=" + decoder["L_ERRORCODE0"] + "&" +
"Desc=" + decoder["L_SHORTMESSAGE0"] + "&" +
"Desc2=" + decoder["L_LONGMESSAGE0"];
return false;
}
}
public bool DoCheckoutPayment(string finalPaymentAmount, string token, string PayerID, ref NVPCodec decoder,
ref string retMsg)
{
if (bSandbox)
{
pEndPointURL = pEndPointURL_SB;
}
NVPCodec encoder = new NVPCodec();
encoder["METHOD"] = "DoExpressCheckoutPayment";
encoder["TOKEN"] = token;
encoder["PAYERID"] = PayerID;
encoder["PAYMENTREQUEST_0_AMT"] = finalPaymentAmount;
encoder["PAYMENTREQUEST_0_CURRENCYCODE"] = "USD";
encoder["PAYMENTREQUEST_0_PAYMENTACTION"] = "Sale";
string pStrrequestforNvp = encoder.Encode();
string pStresponsenvp = HttpCall(pStrrequestforNvp);
decoder = new NVPCodec();
decoder.Decode(pStresponsenvp);
string strAck = decoder["ACK"].ToLower();
if (strAck != null && (strAck == "success" || strAck == "successwithwarning"))
{
return true;
}
else
{
retMsg = "ErrorCode=" + decoder["L_ERRORCODE0"] + "&" +
"Desc=" + decoder["L_SHORTMESSAGE0"] + "&" +
"Desc2=" + decoder["L_LONGMESSAGE0"];
return false;
}
}
