Why and when should be used Update panel using Ajax Technology

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Normally when we use update panel. And why should we use update panel.
Please explain if possible with example. I will be grateful.

Posted 27-Mar-13 0:04am

Sumon562

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Marco Bertschi · Answer 1 · 2013-03-27T01:07:00

The UpdatePanel prohibits the site from loading the controls part by part (e.g. on CodeProject, if your connection is slow the page loads first and then the ads are loading. If they'd have used an update panel the page would load in the back ground and be displayed as soon as it is completly loaded into your browsers cache.)
You can use the UpdatePanel when you want to prevent the user to make actions before the page is fully loaded.

cheers,
Marco Bertschi