cancellationtokensource

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

问题 I start a task, that start other tasks and so forth. Given that tree, if any task fails the result of the whole operation is useless. I'm considering using cancellation tokens. To my surprise, the token does not have a "CancelThisToken()" method... So my question is: how can I, in possession of ONLY a CancellationToken, cancel it? 回答1: As the docs state you need to call the cancel method from the source object. Example code is included in the link you provided. Here are the relevant sections:

问题 I start a task, that start other tasks and so forth. Given that tree, if any task fails the result of the whole operation is useless. I'm considering using cancellation tokens. To my surprise, the token does not have a "CancelThisToken()" method... So my question is: how can I, in possession of ONLY a CancellationToken, cancel it? 回答1: As the docs state you need to call the cancel method from the source object. Example code is included in the link you provided. Here are the relevant sections:

问题 I start a task, that start other tasks and so forth. Given that tree, if any task fails the result of the whole operation is useless. I'm considering using cancellation tokens. To my surprise, the token does not have a "CancelThisToken()" method... So my question is: how can I, in possession of ONLY a CancellationToken, cancel it? 回答1: As the docs state you need to call the cancel method from the source object. Example code is included in the link you provided. Here are the relevant sections:

问题 I have some code that is validating some data by making calls to a number of other services. I start all of the calls in parallel and then wait until at least one of them finishes. If any of the requests fail, I don't care about the result of the other calls. I make the calls with HttpClient and I have passed an HttpMessageHandler in that does a bunch of logging. Essentially: protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken

问题 I have some code that is validating some data by making calls to a number of other services. I start all of the calls in parallel and then wait until at least one of them finishes. If any of the requests fail, I don't care about the result of the other calls. I make the calls with HttpClient and I have passed an HttpMessageHandler in that does a bunch of logging. Essentially: protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken

问题 I have some code that is validating some data by making calls to a number of other services. I start all of the calls in parallel and then wait until at least one of them finishes. If any of the requests fail, I don't care about the result of the other calls. I make the calls with HttpClient and I have passed an HttpMessageHandler in that does a bunch of logging. Essentially: protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken

问题 I encountered a problem how to properly cancel an asynchronous task. Here is some draft. My entry point runs two asynchronous task. The first task does some 'long' work and the second one cancels it. Entry point: private static void Main() { var ctc = new CancellationTokenSource(); var cancellable = ExecuteLongCancellableMethod(ctc.Token); var cancelationTask = Task.Run(() => { Thread.Sleep(2000); Console.WriteLine("[Before cancellation]"); ctc.Cancel(); }); try { Task.WaitAll(cancellable,

问题 I encountered a problem how to properly cancel an asynchronous task. Here is some draft. My entry point runs two asynchronous task. The first task does some 'long' work and the second one cancels it. Entry point: private static void Main() { var ctc = new CancellationTokenSource(); var cancellable = ExecuteLongCancellableMethod(ctc.Token); var cancelationTask = Task.Run(() => { Thread.Sleep(2000); Console.WriteLine("[Before cancellation]"); ctc.Cancel(); }); try { Task.WaitAll(cancellable,

问题 I'm using Parse as a data store for an app, and I am implementing their Facebook Login functionality. AFAIK, this Login method isn't any different than other async methods so hopefully it applies. So there is a Login.xaml page, that has a button for "Login with Facebook", and tapping this button takes you to the FacebookLogin.xaml page which contains only the WebBrowser control as per the linked Parse documenation. In ContentPanel.Loaded on FacebookLogin.xaml, I can use the following code to