Building an Web 2.0 Portal

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So, you need to seriously think about (and test) how to optimize script file size and reduce network roundtrips as much as possible. Ideally, you should try to deliver only one large JavaScript file that combines all the smaller JavaScript files that are essential for the web portal to be fully functional on first visit. Rendering a Second-Visit Experience The second visit is piece of cake. NET membership provider. All the Ajax scripts are already in the browser’s cache. So, you just load existing pages and widgets on the page and render the page to the browser (see Figure 2-14).

When you complete a drag-and-drop move, it is reflected on the UI, but the server does not know what just happened. Any kind of postback to inform the server of the position of the widget will create a disruptive user experience because the whole page or column will refresh. The server needs to be informed asynchronously behind the scenes so the user doesn’t notice the widgets’ positions being transmitted to the server and saved after each drag and drop. The second challenge is to provide this entire drag-and-drop functionality in the form of one Extender.

IWidget interface public interface IWidget { void Init(IWidgetHost host); void ShowSettings( ); void HideSettings( ); void Minimized( ); void Maximized( ); void Closed( ); } The IWidget interface defines a way to inform the widget when to initialize the widget area and restore its state. When a user clicks the “edit” link, ShowSettings informs the widget to show the settings area. When a user clicks the maximize or minimize links (the plus or minus icons), Maximized and Minimized functions are called.

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