Home > DeveloperSection > Interviews > What is the difference between synchronous postback and asynchronous postback?

Posted on    September-02-2014 11:13 PM

 ASP.Net ASP.Net 
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Sumit Kesarwani

Total Post:782

Posted on    September-02-2014 12:00 AM

The difference between synchronous and asynchronous postback is as follows:

Asynchronous postback renders only the required part of the page; whereas, synchronous postback renders the entire page for any postback.

Asynchronous postback executes only one postback at a time, that is, if you have two buttons doing asynchronous postback, the actions will be performed one by one; whereas, synchronous postback executes all the actions at once.

Asynchronous postback only modifies the update panel that raises the postback; whereas, synchronous postback modifies the entire page.

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