Download Project  (Full Project)

Step-1

In this tutorial I want to show how to integration PayPal payments in ASP.NET application.  Now first go to PayPal official site and create new account. Go to https://www.paypal.com  then sign up.  Now I want create Business account so check Business Account then click next. Then Give your Email address and click continue. Then Give your password and click continue. Now write into all text boxes then click Agree and create account. Then again write into all text boxes then click continue. Now write into all text boxes then click submit. Ok we create our account successfully. We can see our account like that. Then go to account Settings.

Step-2

Now open new tab and go to PayPal developer site. Go to https://developer.paypal.com.

And click dashboard.

Then click create app button. Then give the app name and click create app. Now we can see our Client ID and Secret Code. These two things are use our code.

Step-3

Now Start coding First open visual studio then opens our existing project where we are working. First install PayPal liberty from “nuGet” package manager. Go to tools then “NuGet” package manager.

Step-4

After install then build your solution. Now when we click payment button then we will go to PayPal page. Now first under controllers folder creates a controller name as payment. Now go to “Web.config”  file and add some tag given bellow the code:

<configSections>
    <section name="paypal" type="PayPal.SDKConfigHandler, PayPal"/>
  </configSections>
  <!-- PayPal SDK settings -->
  <paypal>
    <settings>
      <add name="mode" value="sandbox"/>
      <add name="connectionTimeout" value="360000"/>
      <add name="requestRetries" value="1"/>
      <add name="clientId" value="write your clientId"/>
      <add name="clientSecret" value="write your client Secret code"/>
    </settings>
  </paypal>

Step-5

Now create a class under project name as “PaypalConfiguration” in this class file code done the PayPal work. “PaypalConfiguration” method use to assign the value. “GetConfig” method work configure the connection. “GetAccessToken” work for access related work done. “GetAPIContext” method is get API and return it. Given bellow the class source code:

using PayPal.Api;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace PayPalApplicetion
{
    public static class PaypalConfiguration
    {
        //Variables for storing the clientID and clientSecret key  
        public readonly static string ClientId;
        public readonly static string ClientSecret;
        //Constructor  
        static PaypalConfiguration()
        {
            var config = GetConfig();
            ClientId = config["clientId"];
            ClientSecret = config["clientSecret"];
        }
        // getting properties from the web.config  
        public static Dictionary<string, string> GetConfig()
        {
            return PayPal.Api.ConfigManager.Instance.GetProperties();
        }
        private static string GetAccessToken()
        {
            // getting accesstocken from paypal  
            string accessToken = new OAuthTokenCredential(ClientId, ClientSecret, GetConfig()).GetAccessToken();
            return accessToken;
        }
        public static APIContext GetAPIContext()
        {
            // return apicontext object by invoking it with the accesstoken  
            APIContext apiContext = new APIContext(GetAccessToken());
            apiContext.Config = GetConfig();
            return apiContext;
        }
    }
}

Step-6

We use payment getaway in controller. This controller is responsible to connect the PayPal. Given bellow the controller code:

using PayPal.Api;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace PayPalApplicetion.Controllers
{
    public class PaymentController : Controller
    {

        public ActionResult Index()
        {
            return View();
        }

        public ActionResult About()
        {
            return View();
        }


    }
}  

Step-7

 Now build and run the project