Long processes

If an operation runs when a user clicks a button on an aspx page and it takes say 1 hour, will the browser and/or the aspnet process time out?  and if so, can I stop it from timing out?
12/3/2003 7:15:35 PM
asp.net.web-forms 93655 articles. 6 followers. Follow

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You would need very very patient users first, second you need to set the session timeout to 60, 20 is the default.

Sam Cromer
Senior .NET Developer
12/3/2003 7:41:30 PM
you need to set Script timeout as well.
12/5/2003 11:21:40 PM
> If an operation runs when a user clicks a button on an aspx page and it takes say 1 hour, will the browser and/or the aspnet process time out?

hell yes. if the script timeout is huge, then the HTTP connection will time out anyway, killing the process. If you're looking at a process this size, ASP.NET is not a suitable way to run it. I recommend using a background service monitoring an MSMQ queue (or a custom queue). The ASP.NET page just acts as a front-end for the queue, releasing the page quickly. The background process then deals with the processing as necessary.
ASP.NET is fundamentally unsuited to long-running processes, as is 'classic' ASP, PHP, ColdFusion, JSP etc, in their standard form.
I've personally done 25 minute operations by using a WSH script (which is now a full-blown executable) running at cheduled intervals in Windows Task Scheduler, which then handles all the jobs in my 'queue' SQL Server table. It takes a fair bit off effort, but it works.
RTFM - straight talk for web developers. Unmoderated, uncensored, occasionally unreadable

Jason Brown - MVP, IIS
12/6/2003 5:43:02 AM
Another very cool way of handling this is a "OneWay" XML Web Service. Basically, you can start the (long) service from your .ASPX page, and your .ASPX page can return while the long process continues. A good reference for this can be found at:

The WEB Method attributes you want are:

Steve Sharrock

Microsoft MVP - ASP.NET


AspAlliance Columnist

12/6/2003 9:12:14 AM

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