C#笔记：线程的几种应用 <p>利用闲暇时间在UI线程的空闲做一些不占时间的操作（不另起线程）和利用委托新建线程实现。 <br/></p><pre class="brush:c#;toolbar:false">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; } } }</pre><p><br/></p> 来自 大脸猫 写于 2015-02-16 22:04 -- 更新于2020-10-19 13:06 -- 0 条评论