Countdown in ASP.NET

I need to give the countdown as shown here, for each item using ASP.NET with C#.

Any ideas on how to solve this p开发者_C百科roblem?

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You can use setInterval method to implement a count down timer.

You can get the initial time from the server. And then use javascript to get the count down timer working.

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To do this you could use ajax. http://www.asp.net/ajax/

Specifically you could use this control http://www.asp.net/ajax/ajaxcontroltoolkit/Samples/AlwaysVisibleControl/AlwaysVisibleControl.aspx

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You need a webservice that can give the state (time left, current price, #bids etc) of all the items visible on the page back to the client.

The client uses typically AJAX / JSON to retrieve the state of all the items on the page and then jquery to update the countdown timers/bids on each item on the page.

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That site is using AJAX, as you can see from the regular refreshes that occur to the individual timers. You can create a web service or web method to consume. If the times don't need to be refreshed during the life of the page, then I would stick with a simple JavaScript countdown using jQuery or the link the @kieran shared.