TaskBarProgress(任务栏进度条)

 1  <Window.TaskbarItemInfo>
 2         <TaskbarItemInfo />
 3     </Window.TaskbarItemInfo>
 4     
 5     <Grid>
 6         <ProgressBar x:Name="ProgressBar"  Margin="10"
 7                      HorizontalAlignment="Stretch"
 8                      VerticalAlignment="Center"
 9                      Height="23" />
10     </Grid>

 1 public partial class MainWindow : Window
 2     {
 3         public MainWindow()
 4         {
 5             InitializeComponent();
 6 
 7             Loaded += new RoutedEventHandler(MainWindow_Loaded);
 8         }
 9 
10         void MainWindow_Loaded(object sender, RoutedEventArgs e)
11         {
12             //BackgroundWorker,在单独的线程上执行操作
13             BackgroundWorker worker = new BackgroundWorker();
14 
15             //BW.DoWork,调用BW.RunWorkerAsync()时发生
16 
17 //初始化命名委托;Lambda 运算符的左边是输入参数（如果有），右边包含表达式或语句块;
18             worker.DoWork += (s, ev) =>
19                 {
20                     for (int i = 0; i < 100; i += 10)
21                     {
22                         Thread.Sleep(1000);
23 
24                         //BW.ReportProgress,引发BW.ProgressChanged事件
25                         ((BackgroundWorker)s).ReportProgress(i);
26                     }
27                 };
28             //调用BW.ReportProgress时发生
29             worker.ProgressChanged += new ProgressChangedEventHandler(worker_ProgressChanged);
30 
31             //当后台操作已完成，被取消或引发异常时发生
32             worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);
33 
34             //BackgroundWorker.WorkerReportsProgress 获取或设置一个值，该值指示 BackgroundWorker 能否报告进度更新。
35             worker.WorkerReportsProgress = true;
36 
37             //TaskbarItemInfo获取或设置 System.Windows.Window 的任务栏缩略图。
38 //TaskbarItemInfo.ProgressState 获取或设置一个值，该值指示在任务栏按钮中显示进度指示器的方式。
39 
40             TaskbarItemInfo.ProgressState = TaskbarItemProgressState.Indeterminate;
41 
42              //TaskbarItemProgressState枚举值
43 //None=0,Indeterminate=1(闪烁绿色),Normal=2(绿色),Error=3(红色),Paused=4(黄色)
44 
45 //开始执行后台操作
46             worker.RunWorkerAsync();
47 
48         }
49 
50 
51         void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
52         {
53             //ProgressChangedEventArgs.ProgressPercentage 获取异步任务的进度百分比
54             ProgressBar.Value = e.ProgressPercentage;
55 
56             // double TaskbarItemInfo.ProgressValue获取或设置一个值，该值指示任务栏按钮中进度指示器的填满状态。
57             TaskbarItemInfo.ProgressValue = (double)e.ProgressPercentage / 100;
58         }
59 
60         void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
61         {
62             ProgressBar.Value = 100;
63             TaskbarItemInfo.ProgressValue = 1.0;
64         }
65     }