Can someone point me to a link which explains difference between IsPostBack, IsCallback and IsCrossPagePostBack in ASP.NET?
I have googled but didn't get exact information.
Found below link for difference between IsPostBack, IsCallback. What is the difference between Page.IsPostBack and Page.IsCallBack?
Thanks, Balu
1) IsPostBack
: "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 (ie sending all of its data) on same page. So, the whole page is refreshed.
2) IsCallBack
: “A callback is generally a call for execution of a function after another function has completed.” But if we try to differentiate it from a postback then we can say: It's a call made to the server to receive specific data instead of whole page refresh like a postback. In ASP.NET, its achieved using AJAX
, that makes a call to server and updating a part of the page with specific data received.
3) IsCrossPagePostBack
: “Gets a value indicating whether the page is involved in a cross-page postback or not." It's a different feature from " IsPostBack
" and " IsCalBack
" because It's generally used when we need to get the data from previous page
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