How to integrate PayPal in ASP.NET MVC 5?

How to integrate PayPal in ASP.NET MVC 5?

Today i would like to describe here step by step procedure to integrating paypal integration (express checkout) in MVC3 web application using razor view engine.

1)Create new MVC3 internet web application.

2)change Index page under Home section and as per below fig





3) Create paypal model class 



4) Create action in home controller to post data to paypal



here we post item information in form so we can retrieve it using parameter as you can see that value when you debug as per below


in that you need to set following parameters in web.config

• BusinessAccountKey: business account key for seller
• UseSandbox: weathere to use sanbox or live
• CancelURL: return to this when user cancel
• ReturnURL: return after payment
• NotifyURL: use for IPN to notify
• CurrencyCode: transcation in which currency 

to use sandbox you need to create account at https://developer.paypal.com/
and in that you can create business account as well as buyers account to testing as per shown in fig



I have added that in web.config as per below



If you new for paypal integration then first go through this introduction here .

5)create view of this action (empty view) and code as per below



6) Now run the site and click pay with paypal , you will be redirecting to paypal as per below


here you can pay with your personal test account and redirect to back as per app-setting URLs

7) To handle redirected request you need to create following controller and respective views with your logic and message. 

• RedirectFromPaypal 
• CancelFromPaypal 
• NotifyFromPaypal 

8)If you not redirect to your website after payment complete then follow the below steps to set return URL in business account.

a. Click on the business test account id and click enter Sandbox test site 

b. Choose Profile --> More options in the menu under Selling Preferences choose Website Payment Preferences

c. Select Auto Return on radio button to redirect and enter return URL below like http://www.xyz.com if you don't have any domain just enter any valid domain name like your blog URL etc. because its only for testing 

d. Enable on Payment Data Transfer to get payment data return in website and save it.

e. Again go to more option website payment reference and see identity token is generated (under payment data transfer) copy that identity token use it in the website web.config file.