cancellationtokensource

问题 I'm unsure how best to cancel a task that is running a system timer. In the code below, every 60 mins the timer will elapse and then run another method (CheckFileOverflow) that is used to check the file size of a system log txt. file Cancellation of the timer ideally would be done by a button click or another method that calls the cancellation. The timer will effectively be allowed to run for as long as the software is running, but when the user eventually shuts down the software i'd like to

问题 I have web application and it calls different web service to perform different work. Some web services will take long time and some short. Application will call all web services parallel to get result when complete or exception. I have started to write code but i need to know how to implement the following works in the best way. A task will be cancelled if any of web service takes more than 5 seconds but remaining tasks will continue to call web service to get either result or excepton. I

问题 I have created a task which creates an XML string. The task can last multiple seconds. When the task isn't finished after 5 seconds, I want to cancel the Task 'smootly' and continue with writing the rest of the XML. So I built in cancellation inside my task. But although I see the following message in the Log: ProcessInformationTask timed out I also see this line in my log Adding the process information took 10001 ms I wonder why this can happen because I want to cancel the Task after 5

问题 I am struggling with the following: I have a system that has its main flow and has two background threads that can be started and stopped, but they're generally very long running as they stop only during configuration changes. I found that the cancellation token in F# gets checked at async points in the code. The worker threads do not perform any async operations; they are doing background work but nothing is asynchronous. A simplified version looks like that: let workerThread (someParameters

问题 Consider a scenario where you have some asynchronous work to be done and you can run it in a fire and forget mode. This asynchronous work is able to listen for cancellation and so you pass it a cancellation token in order to being able to cancel it. At a given moment in time we can decide to request the cancellation of the ongoing activity, by using the cancellation token source object from which we have taken the cancellation token. Because cancellation token source implements IDisposable ,

问题 Consider a scenario where you have some asynchronous work to be done and you can run it in a fire and forget mode. This asynchronous work is able to listen for cancellation and so you pass it a cancellation token in order to being able to cancel it. At a given moment in time we can decide to request the cancellation of the ongoing activity, by using the cancellation token source object from which we have taken the cancellation token. Because cancellation token source implements IDisposable ,

问题 Consider a scenario where you have some asynchronous work to be done and you can run it in a fire and forget mode. This asynchronous work is able to listen for cancellation and so you pass it a cancellation token in order to being able to cancel it. At a given moment in time we can decide to request the cancellation of the ongoing activity, by using the cancellation token source object from which we have taken the cancellation token. Because cancellation token source implements IDisposable ,

问题 Consider a scenario where you have some asynchronous work to be done and you can run it in a fire and forget mode. This asynchronous work is able to listen for cancellation and so you pass it a cancellation token in order to being able to cancel it. At a given moment in time we can decide to request the cancellation of the ongoing activity, by using the cancellation token source object from which we have taken the cancellation token. Because cancellation token source implements IDisposable ,

问题 I have code that creates a CancellationTokenSource and that passes it to a method. I have code in another are of the app that issues a cts.Cancel(); Is there a way that I can cause that method to stop immediately without me having to wait for the two lines inside the while loop to finish? Note that I would be okay if it caused an exception that I could handle. public async Task OnAppearing() { cts = new CancellationTokenSource(); await GetCards(cts.Token); } public async Task GetCards

问题 I'm not sure if I'm stopping a Parallel.ForEach loop as I intend to do. So let me outline the problem. The loop uses a database driver with limited available connections and it is required to keep track of the open connections, so the database driver doesn't throw an exception. The issue is that keeping track of open connections has been implemented manually (this should be refactored - writing a wrapper or using AutoResetEvent but there are some other things that need to be taken care of