在XAML中重用路径对象

问题描述 投票：14回答：5

我有一个Path（一个明星人物）：

<Path x:Name="NiceStar" StrokeThickness="10" Stroke="#ff000000" StrokeMiterLimit="1" Data="F1 M 126.578613,11.297852 L 162.373535,83.825684 L 242.412598,95.456055 L 184.495605,151.911133 L 198.167480,231.626953 L 126.578613,193.990234 L 54.988770,231.626953 L 68.661621,151.911133 L 10.744629,95.456055 L 90.783691,83.825684 L 126.578613,11.297852 Z">
    <Path.Fill>
        <RadialGradientBrush MappingMode="Absolute" GradientOrigin="390.395508,448.130371" Center="390.395508,448.130371" RadiusX="113.034821" RadiusY="113.034821">
            <RadialGradientBrush.Transform>
                <MatrixTransform Matrix="1,0,-0,-1,-263.816895,569.592773" />
            </RadialGradientBrush.Transform>
            <GradientStop Offset="0" Color="#ff00ff00"/>
            <GradientStop Offset="1" Color="#ff006736"/>
        </RadialGradientBrush>
    </Path.Fill>
</Path>

现在我想多次复制这个Path（只是引用“NiceStar”）。我可以在纯XAML中执行此操作吗？

通过这样做，我可以使用它一次：

<Decorator Child="{StaticResource star}" />

但是，我不能复制这一行。我的编译器说：

指定的元素已经是另一个元素的逻辑子元素。首先断开它。

c# .net wpf xaml
5个回答
23
投票

创造一种风格。

<Style x:Key="NiceStarPath" TargetType="{x:Type Path}">
    <Setter Property="StrokeThickness" Value="10"/>
    <Setter Property="Stroke" Value="#FF000000"/>
    <Setter Property="StrokeMiterLimit" Value="1"/>
    <Setter Property="Data" Value="F1 M 126.578613,11.297852 L 162.373535,83.825684 L 242.412598,95.456055 L 184.495605,151.911133 L 198.167480,231.626953 L 126.578613,193.990234 L 54.988770,231.626953 L 68.661621,151.911133 L 10.744629,95.456055 L 90.783691,83.825684 L 126.578613,11.297852 Z"/>
    <Setter Property="Fill">
        <Setter.Value>
            <RadialGradientBrush MappingMode="Absolute" GradientOrigin="390.395508,448.130371" Center="390.395508,448.130371" RadiusX="113.034821" RadiusY="113.034821">
                <RadialGradientBrush.Transform>
                    <MatrixTransform Matrix="1,0,-0,-1,-263.816895,569.592773" />
                </RadialGradientBrush.Transform>
                <GradientStop Offset="0" Color="#ff00ff00"/>
                <GradientStop Offset="1" Color="#ff006736"/>
            </RadialGradientBrush>
        </Setter.Value>
    </Setter>
</Style>

...

<Path Style="{StaticResource NiceStarPath}"/>
7
投票

当然，只需为路径定义样式，然后您可以将其重用为静态资源：

<Page
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Page.Resources>
    <Style x:Key="StarStyle" TargetType="Path">
    <Setter>
        <Setter.Property>Fill</Setter.Property>
        <Setter.Value>                
             <RadialGradientBrush MappingMode="Absolute"
              GradientOrigin="390.395508,448.130371" Center="390.395508,448.130371"
              RadiusX="113.034821" RadiusY="113.034821">
             <RadialGradientBrush.Transform>
                 <MatrixTransform Matrix="1,0,-0,-1,-263.816895,569.592773" />
             </RadialGradientBrush.Transform>
             <GradientStop Offset="0" Color="#ff00ff00"/>
             <GradientStop Offset="1" Color="#ff006736"/>
             </RadialGradientBrush>
         </Setter.Value> 
    </Setter>
    <Setter Property="StrokeThickness" Value="10" />
    <Setter Property="Stroke" Value="#ff000000" />
    <Setter Property="StrokeMiterLimit" Value="1" />
    <Setter Property="Data" Value="F1 M 126.578613,11.297852 L 162.373535,83.825684 L 242.412598,95.456055 L 184.495605,151.911133 L 198.167480,231.626953 L 126.578613,193.990234 L 54.988770,231.626953 L 68.661621,151.911133 L 10.744629,95.456055 L 90.783691,83.825684 L 126.578613,11.297852 Z"/>
    </Style>
</Page.Resources>
<StackPanel>  
    <Path Style="{StaticResource StarStyle}" />
    <Path Style="{StaticResource StarStyle}" />
</StackPanel>
</Page>
6
投票

在相关的说明中，（虽然可能没有直接回答你的问题），你也可以将FrameworkElement声明为资源，给它一个键，只要你添加x:Shared="False"，你就可以在代码中反复访问资源。

这是一个伪编码的例子：

<Window ....>
   <Window.Resources>
      <Ellipse x:Key="ReusableEllipse" x:Shared="False" ...>
         <Ellipse.Fill>
            <!--STUFF-->
         </Ellipse.Fill>
      </Ellipse>
   </Window.Resources>
   <Canvas x:Name="drawCanvas" Background="White"/>
</Window>

然后，在代码中，您可以访问资源化的形状并根据需要重复使用它。

Ellipse tempRect = (Ellipse)FindResouce("ReusableEllipse");
3
投票

我会把路径变成DrawingBrush。这在混合中非常容易，只需选择路径，工具>制作画笔资源>制作DrawingBrush资源。然后，您将拥有资源中的画笔，随时可以重复使用。我希望这个性能非常好，因为画笔是非交互式的并且可以重复使用。

这是XAML：

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="640" Height="480">
    <Window.Resources>
        <DrawingBrush x:Key="NiceStarBrush" Viewbox="0,0,250,240" ViewboxUnits="Absolute">
            <DrawingBrush.Drawing>
                <GeometryDrawing Geometry="F1M126.578613,11.297852L162.373535,83.825684 242.412598,95.456055 184.495605,151.911133 198.16748,231.626953 126.578613,193.990234 54.98877,231.626953 68.661621,151.911133 10.744629,95.456055 90.783691,83.825684 126.578613,11.297852z">
                    <GeometryDrawing.Brush>
                        <RadialGradientBrush MappingMode="Absolute" Center="390.395508,448.130371" GradientOrigin="390.395508,448.130371" RadiusX="113.034821" RadiusY="113.034821">
                            <RadialGradientBrush.Transform>
                                <MatrixTransform Matrix="1,0,0,-1,-263.816895,569.592773"/>
                            </RadialGradientBrush.Transform>
                            <GradientStop Color="Lime" Offset="0"/>
                            <GradientStop Color="#FF006736" Offset="1"/>
                        </RadialGradientBrush>
                    </GeometryDrawing.Brush>
                    <GeometryDrawing.Pen>
                        <Pen Brush="Black" DashCap="Flat" EndLineCap="Flat" LineJoin="Miter" MiterLimit="1" StartLineCap="Flat" Thickness="10">
                            <Pen.DashStyle>
                                <DashStyle/>
                            </Pen.DashStyle>
                        </Pen>
                    </GeometryDrawing.Pen>
                </GeometryDrawing>
            </DrawingBrush.Drawing>
        </DrawingBrush>
    </Window.Resources>
    <Grid x:Name="LayoutRoot">
        <Rectangle Margin="181,115,0,0" Fill="{DynamicResource NiceStarBrush}" HorizontalAlignment="Left" VerticalAlignment="Top" Width="50" Height="46" />
    </Grid>
</Window>

另一种选择是使用DrawingImage将路径包装成一个imagesource

2
投票

您可以将样式与控件模板一起使用

<Style TargetType="Control" x:Key="FolderIcon">
    <Setter Property="IsTabStop" Value="False"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate>
                <Path Data="M -1,0 h 5 M 0,3 h 10 v 5 h -10 Z" StrokeThickness="2" Stroke="White" Fill="White" />
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

然后使用它：

<Button>
    <Control Style="{StaticResource FolderIcon}"/>
</Button>
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