Paypal Express Checkout Integration

Question

Hi All,
I have paypal express checkout account. I want to integrate it with my apex application. So when a customer wants to pay, he can just click the paypal button on my app's page which takes him to the paypal payment screen.
I would appreciate if someone tells me how to add paypal checkout button on the page?
Thanks in advance.

Answer 1

Hi,
Did you actually read the document or just looked at the title and decided it was not what you wanted?
Here is the text from the PDF document that talks about Express Checkout on Page 4.
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<p>Integrating with the Express Checkout is a little more involved and requires calling three distinct APIs. You first establish with PayPal that you want to start an express checkout transaction by calling SetExpressCheckout. PayPal responds with a token which you will need for subsequent API calls and a redirect. In the call to SetExpressCheckout you pass a URL as a parameter to tell PayPal where to redirect back to. You then redirect to PayPal and pass the token you received.</p>
<p>The consumer then chooses their payment option on the PayPal site and can optionally change their shipping address. Once they finalize the transaction at PayPal, they are redirected to the URL you provided in the call to SetExpressCheckout. Two parameters are passed with the URL you provide, token and payerid.</p>
<p>You create a PL/SQL procedure that has exactly two parameters, token and payerid. This procedure is the URL you pass in SetExpressCheckout to let PayPal know where to redirect to once the transaction is done. The procedure looks up the Application Express session for your application using the token.</p>
<p>Now that the consumer is back at your site, you will make a call to the second API, GetExpressCheckoutDetails. This retrieves information from PayPal about the consumer, such as their name, email, phone number, and shipping address. Your application can use that information to display a summary page and a Pay Now button.</p>
<p>Finally, when the consumer clicks the Pay Now button, you call the third API, DoExpressCheckoutPayment. PayPal responds with an acknowledgement and transaction details which your application can store in a local table.</p>
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As for your query
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Then I copied the script in the html header section of my apex page. But the buy now button is being displayed in the top left corner of my page. How can I display it somewhere in the body of the page?
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You can put the script into the Region Source, Region Header or Region Footer to get the position you want in the regions.
Cheers,
PS: You will find some good tips here as well http://www.apexskins.com/~andrewro/paypal/Paypal_Website_Payments_Standard_and_IPN_Integration.pdf
Edited by: Prabodh on Jul 30, 2012 12:10 PM