asp.net postback from code behind

IsPostBack is a property of the Asp.Net page that tells whether or not the page is on its initial load or if a user has perform a button on your web page that has caused the page to post back to itself.

PostBack is the name given to the process of submitting all the information that the user is currently working on and send it all back to the server . Postback is actually sending all the information from client to web server, then web server process all those contents and returns back to client.

In web development, a postback is an HTTP POST to the same page that the form is on . In other words, the contents of the form are POSTed back to the same URL as the form. Postbacks are commonly seen in edit forms, where the user introduces information in a form and hits “save” or “submit”, causing a postback.

A postback is a request sent from a client to server from the same page user is already working with . ASP.NET was introduced with a mechanism to post an HTTP POST request back to the same page. It’s basically posting a complete page back to server (i.e. sending all of its data) on the same page.