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Beginning ASP.NET 3.5 in C# 2008: From Novice to Professional, Second Edition by Matthew MacDonald

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25.4. Timed Refreshes

Using the two controls you've seen so far—the UpdatePanel and UpdateProgress controls—you can create self-contained regions on your page that refresh themselves when certain actions take place. Of course, in order for this technique to work, the user needs to initiate an action that would ordinarily cause a postback, such as clicking a button, selecting an item in an AutoPostBack list, checking an AutoBostBack check box, and so on.

In some situations, you might want to force a full or partial page refresh without waiting for a user action. For example, you might create a page that includes a stock ticker, and you might want to refresh this ticker periodically (say, every 5 minutes) to ensure it doesn't become drastically ...

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