WPF——TaskBarIconOverlay(任务栏图标叠加)

   <Window.Resources>
<DrawingImage x:Key="OverlayImageVector">
<DrawingImage.Drawing>
<GeometryDrawing Brush="Red">
<GeometryDrawing.Geometry>
<RectangleGeometry Rect="0 0 16 16"  RadiusX="3"  RadiusY="3" />    
</GeometryDrawing.Geometry>
</GeometryDrawing>
</DrawingImage.Drawing>
</DrawingImage>

<DrawingImage x:Key="OverlayImage">
<DrawingImage.Drawing>
<ImageDrawing ImageSource="0726_24px_Republic_32bit_PNG.png" Rect="0 0 24 24" />              
</DrawingImage.Drawing>
</DrawingImage>

</Window.Resources>


<Window.TaskbarItemInfo>
<TaskbarItemInfo />
</Window.TaskbarItemInfo>


<Grid>
<StackPanel Width="120"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center">
<Button x:Name="AddOverlay"
                    Content="Add Overlay"
                    Margin="10" />

<Button x:Name="OtherOverlay"
                    Content="Other Overlay"
                    Margin="10" />

</StackPanel>
</Grid>

 1   public partial class MainWindow : Window
 2     {
 3         public MainWindow()
 4         {
 5             InitializeComponent();
 6 
 7             AddOverlay.Click += new RoutedEventHandler(AddOverlay_Click);
 8             OtherOverlay.Click += new RoutedEventHandler(OtherOverlay_Click);
 9         }
10 
11         void OtherOverlay_Click(object sender, RoutedEventArgs e)
12         {
13             //  TaskbarItemInfo.Overlay,获取或设置在任务栏按钮中的程序图标上方显示的图像
14             //TaskbarItemInfo.Overlay = null;
15             TaskbarItemInfo.Overlay = (ImageSource)Resources["OverlayImageVector"];
16         }
17 
18         void AddOverlay_Click(object sender, RoutedEventArgs e)
19         {
20             TaskbarItemInfo.Overlay = (ImageSource)Resources["OverlayImage"];
21         }
22     }