问题
So here's my problem, I need to do a c# service running on a server who's getting file on ftp one time per day at 3am. I think that I can do it with a thread.sleep() or by compare the DateTime.Now with 3am....
Do you have better solution?
Thank you very much for your help!
回答1:
Write a console app or equivalent, and use the Windows Scheduler (or whatever it's called nowadays...) to run it daily.
回答2:
I've used Scheduled Tasks successfully for backups, but I have a word of caution ...
Scheduled tasks are not be performed if you log out. I'm not sure if this can be overidden, but I have been caught out by tasks not performed because Windows automatically updates, reboots and sits waiting for me to log-in.
I disabled automatic updates - Windows should ASK first.
Another consideration is that 3AM is a time when many users would normally be logged out.
回答3:
Other answers are good. I just thought I'd point out that
compare the DateTime.Now with 3am
is a bad solution, even if you sleep for some time between each check, as it wastes system resources unnecessarily (not only in repeatedly checking the time, but also in the memory usage of the program).
回答4:
If you are expecting a file every night, instead of worrying about when it arrives, just get an event fired when it does.
Look at:
System.IO.FileSystemWatcher
File System Watcher on MSDN
回答5:
Why not set this up to run as a scheduled task. Have it execute and then exit. Set up Windows to start the process as a scheduled task at 3:00 AM daily.
回答6:
System.Threading.Timer might work out for you.
Documented here
来源：https://stackoverflow.com/questions/1373306/how-to-execute-code-in-c-sharp-service-one-time-per-day-at-the-same-hour