you will find the AJAX extensions here
http://asp.net/ajax/
an example of the UpdatePanel use simple google or look e.g. here
http://geekswithblogs.net/
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Question
Refresh gridview without refreshing the page
I already have a gridview with itemtemplates and everything ready. Now I need to refresh only the gridview every 30 seconds or so without refreshing the whole page. How can I do it? Is it possible to do it without installing ajax? I don't know much about ajax, so it is kind of intimidating to learn a totally new thing from installation to re-writing the code, just to resolve a refresh issue. Please help, thanks.
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Answers
Hi cmleung2,
Whenever you want to refresh only a portion of a page, there are two possibilities.
1) Create a separate page e.g. GridData.aspx and link with IFrame
2) Use Ajax
I would suggest to go for Ajax as you are already using ASP.NET 2.0 that provides neat way of partial page refresh using UpdatePanel.
UpdatePanel + Gridview refresh
http://forums.asp.net/p/10
If your gridview does not have input elements or action elements then you can build dynamic HTML table on the client side using JSON. It would be very fast as compared to UpdatePanel because there is no viewstate overhead.
JSON example
http://www.codeproject.com
Thanks,
Maulik.
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by: iuconStefanPosted on 2007-09-08 at 08:20:10ID: 19853526
Partial page refresh is not possible without AJAX. You should take a look at the Microsoft ASP.NET AJAX-Toolkit. There is not much you have to learn. The central control you will have to use is an UpdatePanel.
You can place any control into an UpdatePanel. The content inside an UpdatePanel will be refreshed and not the whole site