DispatcherTimer 应用实例

     public partial class MainWindow : Window
     {
         public MainWindow()
         {
             InitializeComponent();
             //实例化
             DispatcherTimer dis = new DispatcherTimer()
             {
                 Interval = TimeSpan.FromMilliseconds()
             };
             dis.Tick += dis_Tick;//写完+=之后按两下Tab可自动创建void dis_Tick(object sender, EventArgs e)
             dis.Start();//dis.Stop();
         }
         double ProgressValue = ;
         void dis_Tick(object sender, EventArgs e)
         {
             if (ProgressValue <= myCan.Width)
             {
                 myBorder.Width = ProgressValue++;
             }
             else
             {
                 ProgressValue = ;
             }
         }
     }

 <Window x:Class="ProgressMask.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">
     <Grid>
         <Canvas Name="myCan" Height="50" Width="500" Background="LightGray">
             <Border Name="myBorder" Background="Green" Height="50" Panel.ZIndex="10" Width="10"></Border>
         </Canvas>
     </Grid>
 </Window>