How can i integrate PayPal with ASP.NET, do you have any sites that can get me started or links to any tutorials?
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1Paypal has several integration options. Which option are you wanting to use? ie: Website Payments Pro, Website Payments Standard, Express Checkout, Payflow Pro,.... – NotMe Feb 26 '12 at 19:53
5 Answers
Read paypal integration in asp.net from Rick Strahl
Update: There is PayPal Helper for web matrix that could be easily integrated to asp.net mvc or asp.net web forms.

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You'll have to use Paypal IPN for that. My site runs with Perl, but the way it basically works is as follows:
- Customer fills out an order form at my site with their name, address, email.
- Customer is being redirected to Paypal
- Upon successful payment via Paypal, Paypal calls my IPN-compliant script
- My script sends me an e-mail notifying me about the completed order
If the customer does not pay within 30 minutes or so, my database also sends him a reminder with a Paypal payment link for the respective order.

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Download the ASP.NET E-Commerce Start Kit, which is now "DashCommerce". It has PayPal implemented. http://dashcommerce.org/

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You can give this Paypal NVP API example in C# (asp.net) a try: http://brad.w3portals.com/2008/02/paypal-nvp-api-example-in-c-aspnet.html
Tries to give a simple example to get you up and running quick. The paypal SDK example are not that great. Cheers.

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Michael987 put together posts from different forums to come up with a solution that worked well for him.
NathanRidley integrated the codes from the link above and released an open source library on Github