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Aaron Li's Blog Write it down before I forget April 2007 Entries
Script Callback
What is the difference between a callback and a postback? A callback is a special postback, so a round-trip always occurs; however, unlike the classic postback, the script callback doesn't redraw the whole page. ViewState is not updated during a callback, it is for postback. How to make a callback? In the client side JavaScript code, if GetCallbackEventReference() method is reference, then when the JavaScript code is executed, a channel to the server is opened and an HTTP request is sent to the remote ......

Posted On Friday, April 20, 2007 2:02 AM

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