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Answered 2010-03-30 07:44:06

ASP.NET 2.0 includes a new Client Callback feature that enables you to retrieve page values and populate them to an already-generated page with out reconstructing page. This makes it possible to use on a page with out going through the entire post back cycle; that means you can update your pages without completely redrawing the page.

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A callback is executable code that is passed as an argument to other code. It allows a lower-level software layer to call a subroutine (or function) defined in a higher-level layer. Callbacks have a wide variety of uses. For example, imagine a function that reads..

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