WPF中的几种处理线程的工作方式：

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WPF多线程演示

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

<Window x:Class="WPF多线程演示.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="MainWindow" Height="350" Width="525" Background="BlanchedAlmond">    <Grid>        <Label Content="UI多线程演示" FontSize="24" Height="49" Margin="139,28,205,0" Name="label1" VerticalAlignment="Top" />        <Button Content="DispatcherTimer" Height="37" Margin="103,73,129,0" Name="button1" VerticalAlignment="Top" Click="button1_Click" />        <Button Content="DispatcherThread" Height="35" Margin="103,116,129,0" Name="button2" VerticalAlignment="Top" Click="button2_Click" />        <Button Content="Thread" Margin="103,167,129,111" Name="button3" Click="button3_Click" />        <Button Content="BackgroundWorker" Height="40" Margin="103,0,129,65" Name="button4" VerticalAlignment="Bottom" Click="button4_Click" />        <ProgressBar Height="35" Margin="64,0,103,24" Name="progressBar1" VerticalAlignment="Bottom" />        <Label Height="35" HorizontalAlignment="Right" Margin="0,252,22,0" Name="label2" VerticalAlignment="Top" Width="60" />    </Grid></Window>

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{    /// <summary>    /// MainWindow.xaml 的交互逻辑    /// </summary>    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<int> newAction = new Action<int>(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<int> newAction = new Action<int>(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：http://files.cnblogs.com/BABLOVE/WPF%E5%A4%9A%E7%BA%BF%E7%A8%8B%E6%BC%94%E7%A4%BA.rar

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