September 2012
Beginner
891 pages
26h 55m
English
Content preview from Beginning ASP.NET 4.5 in VB
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CHAPTER 25
ASP.NET AJAX
So far, you’ve learned to build web pages that use the postback model. With this model, pages are perpetually being sent back to the web server and regenerated. For example, consider the greeting card maker you first saw in Chapter 6. When the user picks a font, enters some text, or chooses new colors, the page is posted back to the web server, allowing your code to run. The web page code makes the necessary adjustments, ASP.NET renders the page to HTML all over again, and the browser receives (and displays) the new version of the page.
This process seems somewhat labor intensive, but it’s actually not that bad. The time ...
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