按钮周围的虚线边框

时间:2013-02-18 12:11:19

标签: wpf

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:最直接的问题是边框粗细,但即使添加了borderthickness,仍然没有出现虚线边框。

2 个答案:

答案 0 :(得分:6)

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

enter image description here

答案 1 :(得分:2)

在您的解决方案中,您的矩形没有大小,因此在绘制时,没有任何东西可以绘制,解决方案是从父边框继承大小:

<Border Width="101" Height="31" BorderThickness="1">
    <Border.BorderBrush>
        <VisualBrush>
            <VisualBrush.Visual>
                <Rectangle StrokeThickness="1"
                    Stroke="Red" 
                    StrokeDashArray="1 2"
                    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>