<Grid>
<Grid HorizontalAlignment="Center" VerticalAlignment="Center" x:Name="g">
<Canvas>
<Rectangle RadiusX="5" RadiusY="5"
Width="{Binding ElementName=g, Path=ActualWidth}"
Height="{Binding ElementName=g, Path=ActualHeight}"
Stroke="Blue" StrokeDashArray="5,2,1,2" StrokeThickness="2"/>
</Canvas>
<TextBlock Margin="10,7,10,7" Text="aaa" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Grid>
</Grid>
效果图：
公共样式：
1 <Style TargetType="ContentControl" x:Key="myBorder"> 2 3 <Setter Property="Template"> 4 5 <Setter.Value> 6 7 <ControlTemplate> 8 9 <Grid x:Name="g" 10 11 Background="{TemplateBinding ContentControl.Background}" 12 13 Width="{TemplateBinding ContentControl.Width}" 14 15 Height="{TemplateBinding ContentControl.Height}"> 16 17 <Canvas> 18 19 <Rectangle RadiusX="5" RadiusY="5" 20 21 Width="{Binding ElementName=g, Path=ActualWidth}" 22 23 Height="{Binding ElementName=g, Path=ActualHeight}" 24 25 Stroke="{TemplateBinding ContentControl.BorderBrush}" 26 27 StrokeDashArray="5,2,1,2" 28 29 StrokeThickness="{TemplateBinding ContentControl.BorderThickness}"/> 30 31 </Canvas> 32 33 <ContentPresenter Margin="5" Content="{TemplateBinding ContentControl.Content}"/> 34 35 </Grid> 36 37 </ControlTemplate> 38 39 </Setter.Value> 40 41 </Setter> 42 43 </Style>
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使用示例：
<ContentControl Margin="10" HorizontalAlignment="Center" VerticalAlignment="Center"
BorderThickness="2" BorderBrush="Blue" Style="{StaticResource myBorder}">
<TextBlock Text="abc"/>
</ContentControl>