JavaScript and Ajax for Web Applications

Just read an article about Fixing Web, Part 1 referred by Ajaxian blog. It mentioned leading three tools used by developers: jQuery, Dojo and YUI. I know the first two already, actually in the learning progress and very impressed by them, the last one is new.

YUI is Yahoo! User Interface Library with set of utilities and controls based on JavaScript. I went to Yahoo! developer site for YUI and watched the overview vedio. It is another very impressive tool I am going to learn.

As the article says, "We've made major progress on the web since 2005 and the rise of Ajax. JavaScript toolkits like JQuery, Dojo, and YUI have expanded what we can do with web browsers and increased our productivity...", I really like to sharp my skills with these great tools.

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GridView and AJAX PopupCalendar Issue

I tried to use ASP.NET AJAX CalendarExtender control in GridView's edit template for a date field in the way just as the example show on How Do I: Configure the ASP.NET AJAX Calendar Control? That is, I added a text box binding to a field in the gridview as date, a image button next to it as a button, and a CalendarExtender control which is AJAX control. The extender control's TargetControlID is the text box, and PopupButtonID is the image control.

However, it does not work. Actually, the pop-up calendar does pop up, but it disappears right away, and the whole page is refreshed. It looks like that the lick on image button caused a call to server to send a post-back call. The example works fine, but it is too simple(a text box, a image button and a CalendarExtender on an aspx page). I am not sure why this extender does not work when it is embedded in the gridview. I think I have to find a way to prevent the post-back call so that the pop-up calendar will stay.

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