May 2006
Intermediate to advanced
60 pages
1h 46m
English
Content preview from ASP.NET AJAX UpdatePanel ControlBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Using the UpdatePanel Control
In this section, we'll walk through three increasingly complex
examples of UpdatePanel. Each example
begins from an ASP.NET 2.0 page that runs without ASP.NET Ajax. By adding
UpdatePanel controls in strategic
places, you can considerably improve the user's experience with minimal
changes.
The first example is a wizard, the second is a master/details scenario that you might find on an e-commerce site, and the third is a simple search engine that could be part of the same site.
Making the ASP.NET 2.0 Wizard Control Behave in a More Fluid Manner
ASP.NET 2.0 introduced the Wizard control, a feature that enables
developers to break tasks too complex for a single page into a number of
smaller steps. Before moving from one step to the next, however, the
control must post back to the server, which forces the user to wait
while the browser completes its work. Example 2 shows markup and C#
code for a very simple, three-step wizard page. In the first step, you
enter your name; in the second step, you enter your address; and in the
third step, a summary of the data you entered in the first two steps is
displayed.
Example 2. A simple page with a Wizard control
<%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>A simple wizard</title> </head> <body> <form id="form1" runat="server"> <div> <asp:Wizard runat="server" ID="Wizard1" ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.