What is the difference between postback, autopostback and callback?

Question

can you define autopostback and postback and it's differences and which web server control support autopostback and postback and also the difference between postback and callback?

Answer 1

• postback: the page performs a POST request to itself
• autopostback: a postback is performed automatically, for example when the selected value of a dropdown changes
• callback: a method which is invoked when a certain event occurs such as clicking on a button. It also could have another meaning that a page performs a request back to the server (such as an AJAX request).