"Atlas" Foundations: ASP.NET 2.0 Callback
Author:
Thiru Thangarathinam
One of the issues developers had when they first started to develop commercial Web sites was some of the limitations of using a browser as the interface. For instance, there were many cases where you wanted to retrieve information from the server after the user had performed some action, like entering an employee number in a Web page to retrieve the details of an employee. To accomplish this, you would post the current page to the server, retrieve the employee information from the database and refresh the page with the information retrieved from the server. Although this method of refreshing the whole page is very common today, it is inefficient because the Web page refreshes and re-renders the entire page of content, even if only a small percentage of the page has actually changed.
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