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I am coding in c# using filesystem watcher to check a directory. How can I say "after 8:00 am if file X is not existing do ....." ?, this have to be verified every day. Thanks for your help !

francops henri
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2 Answers2

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I don't think you need a FileSystemWatcher here. Simply use a Timer or Scheduled tasks which runs at 8:00, then check for your file exist and get the job done.

Timer can be used if your application will be running all the time throughout the day 24 x 7, otherise use latter.

FileSystemWatcher is something, that we use to get notifications about change in the file system anytime and not for checking something exist at particular time.

Update: You can use the FileSystemWatcher to get the file update immediately, then process it and also the Timer mentioned above which finds whether file hasn't been created till 8.00.

Community
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Sriram Sakthivel
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    Unless OP needs to process the file as soon as it arrives and take some action if the file doesn't arrive before specified deadline... – Grx70 Nov 13 '14 at 09:09
  • @Grx70 Anyway that's not mentioned in question. – Sriram Sakthivel Nov 13 '14 at 09:12
  • @Gr70 Yes that what I am doing. I need to send an email if the file doesn't arrive before a specified deadline. If the file is exist it will be processed , that is why i am using FileSystemWatcher. Sriram sry to not specify that – francops henri Nov 13 '14 at 09:14
  • @Grx70 But still he needs a timer, and of course `FileSystemWatcher` also. – Sriram Sakthivel Nov 13 '14 at 09:16
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You can use a scheduler such as Quartz.Net to start at a certain time of the day, see the site for more details:

http://www.quartz-scheduler.net/

Ric
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