WPF中的几种处理线程的工作方式：

1.简单的DispatcherTimer类似Timer控件

2.需要处理UI同步时，Dispatcher DispatcherOpertion

3.增强的Thread对象  System.Windows.Threading

4.BackgroundWorker组建对象

下面看下展示着几种处理方式：xaml文件

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;//引入线程命名空间using System.Windows.Threading;namespace WPF多线程演示{    /// 
    /// MainWindow.xaml 的交互逻辑    /// 
    public partial class MainWindow : Window    {        public MainWindow()        {            InitializeComponent();        }        //方式一        DispatcherTimer tm = new DispatcherTimer();//实例化一个DispatcherTimer对象        private void button1_Click(object sender, RoutedEventArgs e)        {            tm.Tick += new EventHandler(tm_Tick);//订阅Tick事件            tm.Interval = TimeSpan.FromSeconds(0.05);            tm.Start();            // tm.Stop();        }        void tm_Tick(object sender, EventArgs e)        {            if (progressBar1.Value<=100)            {                progressBar1.Value++;                this.label2.Content = progressBar1.Value++ +"%";            }            else            {                tm.Stop();            }                  }        //方式二        public void newActionThread(int value)        {            this.progressBar1.Value = value;            this.label2.Content = progressBar1.Value++ + "%";            System.Threading.Thread.Sleep(100);        }              // 使用线程 方法        public void DispatcherThread()        {            Dispatcher newDispatcher = Dispatcher.CurrentDispatcher;//提供线程工作环境            Action
     
       newAction = new Action
      
       (this.newActionThread);            for (int i = 0; i < 100; i++)            {                newDispatcher.Invoke(newAction, i);                System.Threading.Thread.Sleep(100);                this.DoEvents();                //   newDispatcher.Thread.Abort();            }        }        private void button2_Click(object sender, RoutedEventArgs e)        {            DispatcherThread();        }        //方式三        public void newActionThread2(object value)        {            Action
       
         newAction = new Action
        
         (this.newActionThread);            this.progressBar1.Dispatcher.Invoke(newAction, (int)value);//同步执行指定的委托            System.Threading.Thread.Sleep(100);        }        public void Thread()        {            //winform中的线程            //  System.Threading.Thread;            //wpf环境中的线程            //System.Windows.Threading.Dispatcher.CurrentDispatcher.Thread            System.Threading.ParameterizedThreadStart ts = new System.Threading.ParameterizedThreadStart(this.newActionThread2);//一个线程执行委托            for (int i = 0; i <= 100; i++)            {                System.Threading.Thread t = new System.Threading.Thread(ts);                System.Threading.Thread.Sleep(100);                t.Start(i);                this.label2.Content = progressBar1.Value++ + "%";                this.DoEvents();//界面刷新                        }        }        private void button3_Click(object sender, RoutedEventArgs e)        {            Thread();        }        //方式四BackgroundWorker        //http://msdn.microsoft.com/zh-cn/library/vstudio/system.componentmodel.backgroundworker.aspx更多信息        System.ComponentModel.BackgroundWorker bw;        private void button4_Click(object sender, RoutedEventArgs e)        {            bw = new System.ComponentModel.BackgroundWorker();//创建BackgroundWorker对象实例            bw.DoWork += new System.ComponentModel.DoWorkEventHandler(bw_DoWork);//订阅DoWork事件            bw.ProgressChanged += new System.ComponentModel.ProgressChangedEventHandler(bw_ProgressChanged);//订阅报告进程事件            bw.WorkerReportsProgress = true;            bw.RunWorkerAsync();//开始执行后台操作                  }        void bw_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)        {            this.progressBar1.Value = e.ProgressPercentage;//获取进度百分比            this.label2.Content = (e.ProgressPercentage.ToString() + "%");        }        void bw_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)        {            for (int i = 0; i <= 100; i++)            {                this.bw.ReportProgress(i);                System.Threading.Thread.Sleep(100);            }        }        //方式5我们可以利用线程并行来处理    }}
        
       
      
     

类EX中的是一个扩展方法。进行界面刷新

public static class Ex    {        //扩展方法进行界面刷新        public static void DoEvents(this Window win)        {            DispatcherFrame frame = new DispatcherFrame();            Dispatcher.CurrentDispatcher.BeginInvoke(DispatcherPriority.Background,                new DispatcherOperationCallback(ExitFrames), frame);            Dispatcher.PushFrame(frame);        }        public static object ExitFrames(object f)        {            ((DispatcherFrame)f).Continue = false;            return null;        }    }

 

效果展示：

demo下载：