按钮周围的虚线边框

Question

我正在尝试在按钮周围绘制虚线边框,但边框不会出现.不知道我在这里做错了什么,你能帮忙吗？

我的Xaml代码:

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Height="300" Width="300">

    <Grid Background="Ivory">
        <Border Width="101" Height="31">
            <Border.BorderBrush>
                <VisualBrush>
                    <VisualBrush.Visual>
                        <Rectangle StrokeThickness="1" Stroke="Red" StrokeDashArray="1 2"/>
                    </VisualBrush.Visual>
                </VisualBrush>
            </Border.BorderBrush>
            <Button Width="100" Height="30">
                Focus Here</Button>
        </Border>
    </Grid>
</Page>

注意:直接问题是边框粗细,但即使添加了borderthickness,仍然没有出现虚线边框.

Answer 1

VisualBrush的Visual无法自动确定其大小,因此未根据Border的大小绘制VisualBrush.另请注意,您需要为Border和Rectangle设置相同的BorderThickness.看看下面的XAML.希望它对你有用.

<Border x:Name="MyBorderedButton" Width="101" Height="31" BorderThickness="2" >
      <Border.BorderBrush>
           <VisualBrush>
               <VisualBrush.Visual>
                   <Rectangle StrokeDashArray="4 2"
                      Stroke="Red"
                      StrokeThickness="2"
                      RadiusX="{Binding RelativeSource={RelativeSource AncestorType={x:Type Border}}, Path=CornerRadius.TopRight}"
                      RadiusY="{Binding RelativeSource={RelativeSource AncestorType={x:Type Border}}, Path=CornerRadius.BottomLeft}"
                      Width="{Binding RelativeSource={RelativeSource AncestorType={x:Type Border}}, Path=ActualWidth}"
                      Height="{Binding RelativeSource={RelativeSource AncestorType={x:Type Border}}, Path=ActualHeight}"/>
               </VisualBrush.Visual>
           </VisualBrush>
       </Border.BorderBrush>
       <Button>Focus Here</Button>
</Border>

它为我工作