在运行Task时，UI被冻结

本文关键字：UI 冻结 运行 Task | 更新日期: 2023-09-27 18:18:57

可能是我错了，但我的假设是，任何后台线程可以读写到列表或ObservableCollection，如果我不关心任何特定的顺序。如果我需要一个特定的订单，我将使用BlockingCollection。

    private void buttonTesting_Click(object sender, RoutedEventArgs e)
    {
        PrepareDataForTesting();                
        Stopwatch timer1 = new Stopwatch();
        timer1.Start();           
        //some code preparing data
        List<Task> tasks = new List<Task>();
            //Testing for each pair 
        foreach (InterfaceWithClassName aCompound in Group1) 
        { 
            foreach (InterfaceWithClassName bCompound in Group2) 
            { 
                InstancePair pair = new InstancePair(); 
                //some code 
                Task task = Task.Factory.StartNew(() => TestPairSerial(pair));
                 tasks.Add(task);
             }
          }                
            var ui = TaskScheduler.FromCurrentSynchronizationContext();
            Task.Factory.ContinueWhenAll(tasks.ToArray(),
                antecedents =>
                {
                    timer1.Stop();
                    TimeSpan ts1 = timer1.Elapsed;
                    string elapsedTime1 = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts1.Hours, ts1.Minutes, ts1.Seconds, ts1.Milliseconds / 10);
                    statusLabel_1.Content = "Elapsed time to run the test" + elapsedTime1;
                    statusLabel_0.Content = "Testing made " + passes + " passes";
                    pairsResultsDataGrid.ItemsSource = pairsResultsTable.DefaultView;
                    System.Media.SystemSounds.Exclamation.Play();
                }, CancellationToken.None, TaskContinuationOptions.None, ui);            
                System.Media.SystemSounds.Beep.Play();               
            }

(注意:我不确定它是否重要-"pair"是通过反射找到的)当我点击按钮时，我可以听到最后一行- System.Media.SystemSounds.Beep.Play();这意味着我们退出事件处理程序并启动所有线程。但是，我的应用程序仍然冻结，直到ContinueWhenAll完成。TestPairSerial(pair)方法的结构如下:

private void TestPairSerial(object instances)
    {
      do 
      { 
          do 
           { 
             //here are two methods that read data from minData ObservableCollection
             //minData is a public static property of MainWindow
             //minData is bound to Chart control (in XAML)
            } while (isSetbCompoundParams); 
        } while (isSetaCompoundParams); 
              //filling up results into one table and two dictionaries (main window variables)
    }

在运行Task时，UI被冻结

您正在主线程中执行任务。您可以使用Dispatcher.BeginInvoke

异步执行整个代码。
this.Dispatcher.BeginInvoke(new Action(() => {
    // your code here
}), null);
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