For developers: Add custom fields to the Checkout widget

You can create custom widgets or solutions for checkout according to your business needs, such as a special one-page checkout. This article shows how this can be achieved using the API, so that you can integrate the code into your solution.

This technique has you create a web form, and then use the code it provides, as follows:

1. Create Checkout.aspx with the following content:
2. Create Checkout.aspx.cs with the following content:

NOTE: The Checkout.aspx.designer.cs code is created automatically (auto generated code).