backgroundworker

问题 I am having a difficult time finding documentation on background tasks support for Xamarin.Forms. Does Xamarin.Forms provide support for periodic background tasks? I need to implement this for both Windows Phone 10 and Android. 回答1: XF has no implementation for background tasks. You will need to implement these natively. Below are examples on how to do it for each type of project. UWP https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/BackgroundTask Android https:/

问题 This question already has answers here : How can i use a BackgroundWorker with a timer tick? (6 answers) Closed 2 years ago . I wrote this in VB.NET: Function Net() As Boolean Return My.Computer.Network.Ping("216.58.209.142") End Function Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load Try If Net() = True Then InternetConnection.ForeColor = Color.Green InternetConnection.Text = "OK" ElseIf Net() = False Then InternetConnection.ForeColor = Color.White

问题 I am trying to figure out how BGW decides which thread to run the RunWorkerCompleted handler when its work is done. My initial test uses a WinForm application: On the UI thread, I start bgw1.RunWorkerAsync() . Then I tried to start bgw2.RunWorkerAsync() through bgw1 in 2 different places: bgw1_DoWork() method or bgw1_RunWorkerCompleted() method. My initial guess is BGW should remember which thread it is started on and return to that thread to execute the RunWorkerCompleted event handler when

问题 I am trying to figure out how BGW decides which thread to run the RunWorkerCompleted handler when its work is done. My initial test uses a WinForm application: On the UI thread, I start bgw1.RunWorkerAsync() . Then I tried to start bgw2.RunWorkerAsync() through bgw1 in 2 different places: bgw1_DoWork() method or bgw1_RunWorkerCompleted() method. My initial guess is BGW should remember which thread it is started on and return to that thread to execute the RunWorkerCompleted event handler when

问题 I am trying to figure out how BGW decides which thread to run the RunWorkerCompleted handler when its work is done. My initial test uses a WinForm application: On the UI thread, I start bgw1.RunWorkerAsync() . Then I tried to start bgw2.RunWorkerAsync() through bgw1 in 2 different places: bgw1_DoWork() method or bgw1_RunWorkerCompleted() method. My initial guess is BGW should remember which thread it is started on and return to that thread to execute the RunWorkerCompleted event handler when

问题 I'm writing a WPF application (new technique, mostly I've been writing in WinForms). My goal is to make UI responsive whole time, and I've read that it can be achived using Threading/BackgroundWorker. I think that I should use background worker to put there time consuming methods. But I plan to use method *m_AddLog(string logText)* which should append text to textbox. This method I want to call from main UI thread aswell as from background worker, so messages would be sent immediatelly while

问题 I have defined the following Spring boot application: @SpringBootApplication public class Application implements CommandLineRunner { public static void main(String[] args) { new SpringApplicationBuilder(Application.class).web(WebApplicationType.NONE).run(args); } public void run(String... args) throws Exception { Thread.currentThread().join(); } } I also have a package of workers (i.e. could be classes which implements Runnable ). They are supposed to run indefinitely. What is the "Spring way

问题 I have defined the following Spring boot application: @SpringBootApplication public class Application implements CommandLineRunner { public static void main(String[] args) { new SpringApplicationBuilder(Application.class).web(WebApplicationType.NONE).run(args); } public void run(String... args) throws Exception { Thread.currentThread().join(); } } I also have a package of workers (i.e. could be classes which implements Runnable ). They are supposed to run indefinitely. What is the "Spring way

问题 I have a sample WinForms application that uses the BackgroundWorker component. It works fine but when I hit the Cancel button to cancel the background thread it doesn't cancel the thread. When I hit the Cancel button to call .CancelAsync() method, then in RunWorkerCompleted event handler e.Cancelled Property always remains false . I think when I hit Cancel button it should be set to true. private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) { for (int i = 1; i <= 100; i++)

问题 I find that I am enjoying the simplicity of running code asynchronously through BackgroundWorkers. I have taught myself through example or trial and error on its uses, pitfalls, safe-threading etc., not so much the theory and perhaps my Achilles heel. I have done my reserach but one thing I don't find very much talk of, how can I effectively create and use a pool of BackgroundWorkers? Or what is a better alternative that is just as simple as using BWs? I will illustrate the problem I am