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.NET Forum / ASP.NET / General / February 2008a timed event in asp.net
With the help of some of you guys, we're making progress here. I have a webservice that outputs a file which another apps picks up. I write a row to SQL that has some status flags of this output file. The other apps processes this file, and will set the status in one of the columns to true when the output file IT created is ready. So in my webservice, I want to check every, oh, maybe 1/2 sec to see when the processing app is done. However, I want to time out after about 10 seconds. What's the best way to do a loop that will execute a function, but only execute this function until it returns TRUE or the elapsed time is done? I can obviously take current time, but is there other timer functions that I should use? Larry, This article shows how you can use a timer in the Global class of a web application. It's not exactly the same thing you are asking for, but it's close enough to be of use: http://www.eggheadcafe.com/tutorials/aspnet/223319d8-6366-492a-8eae-e3c7a26c88a4 /refreshing-aspnet--cache.aspx -- Peter Site: http://www.eggheadcafe.com UnBlog: http://petesbloggerama.blogspot.com MetaFinder: http://www.blogmetafinder.com > With the help of some of you guys, we're making progress here. > [quoted text clipped - 12 lines] > is done? I can obviously take current time, but is there other timer > functions that I should use? there are two approaches 1) check the timeout/cancel flag. this is easy if there is a loop, less if not. this approach is also difficult if there are calls to code that may not return in the timeout. 2) use a watchdog thread. this is a second thread that starts a timer, and aborts the processing thread if not completed in time. at completion the process thread would cancel the watchdog. this makes the processing thread easy to code, but the watchdog takes a little work. you have a trival polling loop, so I'd do #1. with a little work, you could have one polling thread that does the work for all concurrent requests. -- bruce (sqlwork.com) > With the help of some of you guys, we're making progress here. > [quoted text clipped - 12 lines] > is done? I can obviously take current time, but is there other timer > functions that I should use? I'm not really sure to understand the overall process but I would just notify the webservice using another call : - the "other app" calls the webservice to get a file - the "other app" process this file to create a "processed file" (at a location that is shared with the web service ?) - the "other app" calls the same webservice to notify the webservice that the "processed file" is ready -- Patrice > With the help of some of you guys, we're making progress here. > [quoted text clipped - 12 lines] > is done? I can obviously take current time, but is there other timer > functions that I should use? Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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