C#笔记：线程的几种应用

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        private bool continueCacu = false;
        public delegate void MyCacuDelegate(int a);
        public delegate void MyCacuDelegate2();
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            if (continueCacu)
            {
                continueCacu = false;
                this.StartOrStop.Content = "Resume";
            }
            else
            {
                continueCacu = true;
                this.StartOrStop.Content = "stop";
                StartOrStop.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.SystemIdle, new MyCacuDelegate(this.CheckNextNumber), 3);
                //MyCacuDelegate dele = new MyCacuDelegate(this.CheckNextNumber);
                //dele.BeginInvoke(3, null, null);
                //CheckNextNumber2();
                //MyCacuDelegate2 dele = new MyCacuDelegate2(CheckNextNumber2);
                //dele.BeginInvoke(null, null);
            }
        }
        public void CheckNextNumber(int num)
        {
            // Reset flag.
            bool isPrime = true;
            for (long i = 3; i <= Math.Sqrt(num); i++)
            {
                if (num % i == 0)
                {
                    // Set not a prime flag to ture.
                    isPrime = false;
                    break;
                }
            }           // If a prime number.
            if (isPrime)
            {
                //StartOrStop.Content = num; 
                //Thread.Sleep(1000);
                this.StartOrStop.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal, new MyCacuDelegate((x) =>
                {
                    this.StartOrStop.Content = x;
                }), num);
            }
            if (continueCacu)
            {
                StartOrStop.Dispatcher.BeginInvoke(
                    System.Windows.Threading.DispatcherPriority.SystemIdle,
                    new MyCacuDelegate(this.CheckNextNumber), num + 2);
                //MyCacuDelegate dele = new MyCacuDelegate(this.CheckNextNumber);
                //dele.BeginInvoke(num + 2, null, null);
            }
        }
        public void CheckNextNumber2()
        {
            int num = 3;
            while (continueCacu)
            {
                bool isPrime = true;
                for (long i = 3; i <= Math.Sqrt(num); i++)
                {
                    if (num % i == 0)
                    {
                        // Set not a prime flag to ture.
                        isPrime = false;
                        break;
                    }
                }           // If a prime number.
                if (isPrime)
                {
                    //StartOrStop.Content = num; 
                    Thread.Sleep(100);
                    this.StartOrStop.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal, new MyCacuDelegate((x) =>
                    {
                        this.StartOrStop.Content = x;
                    }
                    ), num);
                }
                num += 2;
            }
        }
    }