[WPF] 如何为无边框窗口设置阴影效果

需要将窗口样式添加到 App.xaml 中

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1. <Style x:Key="for_noresize_window" TargetType="{x:Type Window}">  
2.     <Setter Property="AllowsTransparency" Value="true"/>  
3.     <Setter Property="Background" Value="Transparent"/>  
4.     <Setter Property="FontFamily" Value="Consolas, Microsoft YaHei"/>  
5.     <Setter Property="FontSize" Value="24"/>  
6.     <Setter Property="ResizeMode" Value="NoResize"/>  
7.     <Setter Property="WindowStyle" Value="None"/>  
8.     <Setter Property="Template">  
9.         <Setter.Value>  
10.             <ControlTemplate TargetType="{x:Type Window}">  
11.                 <Grid Margin="10">  
12.                     <Rectangle Fill="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"  
13.                                RadiusX="5" RadiusY="5">  
14.                         <Rectangle.Effect>  
15.                             <DropShadowEffect BlurRadius="10" ShadowDepth="0"/>  
16.                         </Rectangle.Effect>  
17.                     </Rectangle>  
18.                     <Border Background="{TemplateBinding Background}"  
19.                             BorderBrush="{TemplateBinding BorderBrush}"  
20.                             BorderThickness="{TemplateBinding BorderThickness}"  
21.                             Padding="{TemplateBinding Margin}"  
22.                             SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"  
23.                             CornerRadius="5">  
24.                         <ContentPresenter />  
25.                     </Border>  
26.                 </Grid>  
27.             </ControlTemplate>  
28.         </Setter.Value>  
29.     </Setter>  
30. </Style>  

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1. <Window x:Class="TestProject.Windows.NoResizeWithShadowEffect"  
2.         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"  
3.         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"  
4.         Background="Transparent" Height="500" Width="500"  
5.         Title="NoResizeWithShadowEffect"  
6.         WindowStartupLocation="CenterScreen"  
7.         Style="{StaticResource for_noresize_window}">  
8.     <Grid>  
9.         <StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">  
10.             <Label Content="NoResizeWithShadowEffect" Foreground="Olive"/>  
11.             <TextBlock Text=""/>  
12.             <Button Padding="20,5" Content="Close Window" Click="Clicked"/>  
13.             <x:Code>  
14.                 <![CDATA[ 
15.                 void Clicked(object sender, RoutedEventArgs e) 
16.                 { 
17.                     this.Close(); 
18.                 } 
19.                 ]]>  
20.             </x:Code>  
21.         </StackPanel>  
22.     </Grid>  
23. </Window>