计划的任务终止时如何运行代码

Question

We're running a C# console program as a scheduled task on Windows. This program itself runs a lot of "tasks" that would need to be gracefully shutdown when the program itself is ended.

Is there a way to run cleanup code (that could take a second or two) when the scheduled task is ended? For instance when it is ended by calling Stop-ScheduledTask from a PowerShell script.

I've tried catching CTRL-C events as well as catching the ProcessExit event of AppDomain , but none of these appear to be called when the scheduled task is ended.

As outlined by rrirower in the comments, another option would be to send a signal to the process before asking it to terminate, but this does not seem better supported on Windows.

Answer 1

I ended up making an HTTP query to the REST API of the program to ask it to terminate its tasks, right before I terminate the scheduled task:

Invoke-RestMethod -Method Post -Uri ("{0}/Application/TerminateAllTasks" -f $programUrl)
$p = Get-Process "NameOfTheProcess" -ErrorAction Stop
$task | Stop-ScheduledTask -ErrorAction Stop
$p.WaitForExit()

In the longer run, we will convert the program to a proper Windows service, which will make graceful termination easier.