What is the difference between Page.IsPostBack and Page.IsCallBack?

Question

I\'ve recently ran into some code that checks Page.IsCallBack but I wasn\'t sure how it is different from Page.IsPostBack. Can anyone enlighten me?

Answer 1

A postback is when the form is posted back to itself, either by clicking a submit button or through Javascript (like AutoPostback controls)

A callback is when an AJAX Control calls a method on the page as part of an ajax request