Paypal Integration

PayPal

Here I Would like to share payapl integration with the asp.net website.

Step by step

1. Prereqs:
   - Paypal business account with paypal websites pro enabled
   - Paypal sandbox account (you must login and accept the agreement for websites pro from this account)
   - get an API username, password, & signature from your sandbox account

- Create Seller account with 100$ balance and that seller accounts api username,password,signature use.

2. create an ASPX form with the following fields:
   cctypeDdl, ccnumberTextbox, expdateDropDown, yearDropDown, CVVcodeTextBox, amountTextBox, firstnameTextbox, lastnameTextbox, addressTextbox, cityTextbox, regionTextbox, countryDropDown, postalTextbox .and these labels: successLabel, errLabel, errcodeLabe
3. Create a button control and button_click event handler
4. string strUsername = "pxxxxx.xxx_api1.xxxx.com";

string strPassword = "123456780";

string strSignature = "AegUd0h54RhcCVb8dQ2IJUh9IDp6A4MWXidjp5qgcm";

string strCredentials = "USER=" + strUsername + "&PWD=" + strPassword + "&SIGNATURE=" + strSignature;

string strNVPSandboxServer = "https://api-3t.sandbox.paypal.com/nvp";

//string strAPIVersion = "2.3";

string strAPIVersion = "98";

string strNVP = strCredentials + "&METHOD=DoDirectPayment" +

"&CREDITCARDTYPE=" + CreditCardTypeType.Visa.ToString() +

"&ACCT=" + txtCCN.Text +

"&EXPDATE=" + "42018" +

"&CVV2=" + "111" +

"&AMT=" + "7.47" +

"&FIRSTNAME=" + "Parth" +

"&LASTNAME=" + "Mehta" +

"&IPADDRESS=10.x.x.xx" +

"&STREET=452-New street" +

"&CITY=Ahmedabad" +

"&STATE=Gujarat" +

"&COUNTRY=" + "USA" +

"&ZIP=95110" + "14543" +

"&COUNTRYCODE=US" +

"&PAYMENTACTION=" + PaymentActionCodeType.Sale +

"&cancelUrl=http://www.example.com/cancel.html" +

"&returnUrl=http://www.example.com/success.html" +

"&VERSION=" + strAPIVersion;

try

{

//Create web request and web response objects, make sure you using the correct server (sandbox/live)

HttpWebRequest wrWebRequest = (HttpWebRequest)WebRequest.Create(strNVPSandboxServer);

wrWebRequest.Method = "POST";

StreamWriter requestWriter = new StreamWriter(wrWebRequest.GetRequestStream());

requestWriter.Write(strNVP);

requestWriter.Close();

// Get the response.

HttpWebResponse hwrWebResponse = (HttpWebResponse)wrWebRequest.GetResponse();

StreamReader responseReader = new StreamReader(wrWebRequest.GetResponse().GetResponseStream());

//and read the response

string responseData = responseReader.ReadToEnd();

responseReader.Close();

string result = Server.UrlDecode(responseData);

string[] arrResult = result.Split('&');

Hashtable htResponse = new Hashtable();

string[] responseItemArray;

foreach (string responseItem in arrResult)

{

responseItemArray = responseItem.Split('=');

htResponse.Add(responseItemArray[0], responseItemArray[1]);

}

string strAck = htResponse["ACK"].ToString();

if (strAck == "Success" || strAck == "SuccessWithWarning")

{

string strAmt = htResponse["AMT"].ToString();

string strCcy = htResponse["CURRENCYCODE"].ToString();

string strTransactionID = htResponse["TRANSACTIONID"].ToString();

string strSuccess = "Thank you, your order for: $" + strAmt + " " + strCcy + " has been processed.";

successLabel.Text = strSuccess;

}

else

{

string strErr = "Error: " + htResponse["L_LONGMESSAGE0"].ToString();

string strErrcode = "Error code: " + htResponse["L_ERRORCODE0"].ToString();

errLabel.Text = strErr;

errcodeLabel.Text = strErrcode;

return;

}

}

catch (Exception ex)

{

// do something to catch the error, like write to a log file.

Response.Write("error processing");

}

5. once it work successfully deploy in live server . For that
   https://developer.paypal.com/webapps/developer/docs/classic/lifecycle/goingLive/

How to take classic api's username, password and signature

https://developer.paypal.com/webapps/developer/docs/classic/lifecycle/ug_sandbox/