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timer in a custom control?

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dennismc@attbi.com

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I am implementing a "news wire" custom control. It is
supposed to periodically poll a web service for new news
stories. How can I do this in an ASP.NET control?

If it were a Windows control, I would just include a
Timer. But I need the timer to run in the browser, and
trigger a postback to my control when the timer interval
expires. There is a window.SetInterval function in
JavaScript, but how can a control produce script that
will be executed when the page that contains the control
is loaded into the browser?

Thanks,
Dennis

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Paul Brenner

[Original message clipped]

see System.Web.UI.Page.RegisterClientScriptBlock and
System.Web.UI.Page.RegisterStartupScript.

Thanks,
Dennis
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Scott Watermasysk (VIP)

Dennis,

You might want to just cache your news items. Once the cache expires, on the
next postback you can hit the web service, get your updates and re-cache the
data for your specified time frame.

I put together a sample control that retrieves data from the KBAlertz XML
newsfeed. The returned dataset is then cached for x (can be set by the user
of the control) numbers of minutes.

The control and full source code can be found at:
http://TripleASP.Net/KBAlertz.aspx?navid=34

HTH,
Scott

-----Original Message-----
From: Click here to reveal e-mail address [mailto:Click here to reveal e-mail address]
Sent: Thursday, June 20, 2002 9:55 AM
To: aspngcontrolscs
Subject: [aspngcontrolscs] timer in a custom control?

-- Moved from [aspngcontrolscs] to [aspngcontrolscs] by devin
<Click here to reveal e-mail address> --

I am implementing a "news wire" custom control. It is
supposed to periodically poll a web service for new news stories. How can I
do this in an ASP.NET control?

If it were a Windows control, I would just include a
Timer. But I need the timer to run in the browser, and
trigger a postback to my control when the timer interval expires. There is
a window.SetInterval function in
JavaScript, but how can a control produce script that
will be executed when the page that contains the control
is loaded into the browser?

Thanks,
Dennis
| [aspngcontrolscs] member Click here to reveal e-mail address =
| YOUR ID http://www.asplists.com/asplists/aspngcontrolscs.asp =
| JOIN/QUIT http://www.asplists.com/search = SEARCH Archives

Reply to this message...

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