Wpf 将路径填充绑定到ContentPresenter中的按钮前景

我有一个包含ContentPresenter的模板的按钮样式，其中我尝试将路径填充绑定到按钮的前景：

<!-- This is inside the template of a button style -->
<ContentPresenter>
 <ContentPresenter.Resources>
  <Style TargetType="{x:Type Path}">
   <Setter Property="Fill" Value="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType=Button}}"/>
   </Style>
  </ContentPresenter.Resources>
</ContentPresenter>

我还有一个没有填充集的路径，我可以在按钮中引用它作为内容，如下所示：

<Button Style="{DynamicResource MyButtonStyle}" Content="{DynamicResource PathIcon}" Foreground="Blue"/>

我希望按钮内的路径是蓝色的，但它不是。。。它不能从按钮上抓取前景

如何获取绑定到按钮颜色的路径

谢谢大家!

附言：

如果我在值中添加了硬编码颜色（即Value=“Red”），则按钮内的路径为红色。。。所以我知道这很有效

<ContentPresenter>
 <ContentPresenter.Resources>
  <Style TargetType="{x:Type Path}">
   <Setter Property="Fill" Value="Red"/>
   </Style>
  </ContentPresenter.Resources>
</ContentPresenter>

---

编辑：

以下是完整的样式和控件模板：

<Style x:Key="Button_Style" TargetType="{x:Type Button}">
        <Setter Property="Foreground" Value="{StaticResource White_Brush}"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Grid x:Name="grid" Background="Transparent">
                        <ContentPresenter>
                            <ContentPresenter.Resources>
                                <Style TargetType="{x:Type Path}">
                                    <Setter Property="Fill" Value="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType=Button}}"/>
                                </Style>
                            </ContentPresenter.Resources>
                        </ContentPresenter>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                               <!-- Should affect Text as well as Paths in the Content property of the button! -->                              
                               <Setter Property="Foreground" Value="{StaticResource Black_Brush}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

好的，我们来点：

它不能从按钮上抓取前景

在这种结构中：

RelativeSource={RelativeSource AncestorType=Button}

不会起作用，因为

样式

只是setter的集合，他不知道如何控制，是否存在，特别是视觉树的内容。因为

RelativeSource

应该引用可视化树中的上述项。为此，通常使用

DataTemplate

或

ControlTemplate

如果我在值中添加硬编码颜色（即Value=“Red”）

是的，在这种情况下，将起作用，并且总是更好地创建表单的设计：

<SolidColorBrush x:Key="MyButtonColor" Color="Blue" />

在

样式中或其他地方：

<Setter Property="Fill" Value="{StaticResource MyButtonColor}" />   

代码隐藏

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }
}

public class MyDependencyClass : DependencyObject
{
    #region IsCheckedOnDataProperty

    public static readonly DependencyProperty DataForPathProperty;

    public static void SetDataForPath(DependencyObject DepObject, string value)
    {
        DepObject.SetValue(DataForPathProperty, value);
    }

    public static string GetDataForPath(DependencyObject DepObject)
    {
        return (string)DepObject.GetValue(DataForPathProperty);
    }

    #endregion

    static MyDependencyClass()
    {
        PropertyMetadata MyPropertyMetadata = new PropertyMetadata(String.Empty);

        DataForPathProperty = DependencyProperty.RegisterAttached("DataForPath",
                                                            typeof(string),
                                                            typeof(MyDependencyClass),
                                                            MyPropertyMetadata);
    }
}

注意：在
样式中
我没有对attached属性使用TemplateBinding，因为TemplateBinding在模板外部或其VisualTree属性外部不起作用，所以您甚至不能在模板的触发器内部使用TemplateBinding。因此，我们必须使用构造
{relativeSourceTemplatedParent}
和与要检索其值的依赖项属性相等的路径

输出


要下载整个示例，请按照此操作。
我偶然发现了类似的问题，但想知道如何在按钮处于禁用状态时获得“前景色”（以获得正确的绘图颜色）。这里是最后一个简单的解决方案。没有模板，没有样式，没有代码，什么都没有。正是正确的相对绑定：-）：


谢谢您的回复！这里有很多关于WPF最佳实践的好信息，但我不确定如何应用您的评论来解决我的问题。@user1084857:好的，那么您的问题是什么？我可能应该更清楚高级问题：我希望能够将文本块、路径或两者作为按钮的内容，并更改鼠标上方的颜色、显示等。。。无需管理大量状态列表作为数据触发器来强制设置路径的颜色。我想一个简单的方法是直接在样式/模板中为每个状态设置前景，然后我在内容上放置的任何路径都将获取前景的颜色。这就是我要做的…@user1084857:尝试将
相对资源
移动到
控制模板
，在那里它会工作，在
风格
中它不会工作。我相信这就是我要做的。。。我在原来的问题中添加了完整的样式和控件模板。。。你觉得有什么不对劲吗？
<Window x:Class="ButtonPathHelp.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:ButtonPathHelp"
    xmlns:sys="clr-namespace:System;assembly=mscorlib"
    WindowStartupLocation="CenterScreen"
    Title="MainWindow" Height="350" Width="525">

    <Window.Resources>
        <SolidColorBrush x:Key="Green_Brush" Color="Green" />
        <SolidColorBrush x:Key="Black_Brush" Color="Black" />

        <Style x:Key="Button_Style" TargetType="{x:Type Button}">
            <Setter Property="Foreground" Value="{StaticResource Green_Brush}" />
            <Setter Property="HorizontalAlignment" Value="Center" />
            <Setter Property="VerticalAlignment" Value="Center" />

            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Button}">
                        <Grid x:Name="grid">
                            <ContentPresenter x:Name="MyContent"
                                              Content="{TemplateBinding Content}"
                                              HorizontalAlignment="{TemplateBinding HorizontalAlignment}"
                                              VerticalAlignment="{TemplateBinding VerticalAlignment}" />

                            <Path x:Name="MyPath" 
                                  SnapsToDevicePixels="True" 
                                  Width="20" 
                                  Height="18" 
                                  Stretch="Fill" 
                                  Fill="{Binding Path=Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" 
                                  Data="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(local:MyDependencyClass.DataForPath)}" />
                        </Grid>

                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Foreground" Value="{StaticResource Black_Brush}"/>
                            </Trigger>

                            <Trigger Property="Tag" Value="OnlyText">
                                <Setter TargetName="MyPath" Property="Visibility" Value="Collapsed" />
                                <Setter TargetName="MyContent" Property="Visibility" Value="Visible" />
                            </Trigger>

                            <Trigger Property="Tag" Value="OnlyPath">
                                <Setter TargetName="MyPath" Property="Visibility" Value="Visible" />
                                <Setter TargetName="MyContent" Property="Visibility" Value="Collapsed" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>

    <WrapPanel>
        <WrapPanel.Resources>
            <sys:String x:Key="Save">
                F1 M 20.5833,20.5833L 55.4167,20.5833L 55.4167,55.4167L 45.9167,55.4167L 45.9167,44.3333L 30.0833,44.3333L 30.0833,
                55.4167L 20.5833,55.4167L 20.5833,20.5833 Z M 33.25,55.4167L 33.25,50.6667L 39.5833,50.6667L 39.5833,55.4167L 33.25,
                55.4167 Z M 26.9167,23.75L 26.9167,33.25L 49.0833,33.25L 49.0833,23.75L 26.9167,23.75 Z
            </sys:String>

            <sys:String x:Key="Search">
                F1 M 23.4454,49.2637L 31.7739,41.1598C 30.6986,39.2983 30.4792,37.1377 30.4792,34.8333C 30.4792,27.8377 35.7544,
                22.1667 42.75,22.1667C 49.7456,22.1667 55.4167,27.8377 55.4167,34.8333C 55.4167,41.8289 49.7456,47.1042 42.75,
                47.1042C 40.5639,47.1042 38.5072,46.9462 36.7125,45.9713L 28.3196,54.1379C 27.0829,55.3746 24.6821,55.3746 23.4454,
                54.1379C 22.2088,52.9013 22.2088,50.5004 23.4454,49.2637 Z M 42.75,26.9167C 38.3777,26.9167 34.8333,30.4611 34.8333,
                34.8333C 34.8333,39.2056 38.3777,42.75 42.75,42.75C 47.1222,42.75 50.6667,39.2056 50.6667,34.8333C 50.6667,
                30.4611 47.1222,26.9167 42.75,26.9167 Z
            </sys:String>
        </WrapPanel.Resources>

        <Button Name="SaveButton"
                Style="{StaticResource Button_Style}" 
                Tag="OnlyPath"
                local:MyDependencyClass.DataForPath="{StaticResource Save}"
                Margin="10" />

        <Button Name="JustText"
                Style="{StaticResource Button_Style}" 
                Tag="OnlyText"
                Content="Just Text"
                Margin="10" />

        <Button Name="SearchButton"
                Style="{StaticResource Button_Style}" 
                Tag="OnlyPath"
                local:MyDependencyClass.DataForPath="{StaticResource Search}"
                Margin="10" />
    </WrapPanel>
</Window>

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }
}

public class MyDependencyClass : DependencyObject
{
    #region IsCheckedOnDataProperty

    public static readonly DependencyProperty DataForPathProperty;

    public static void SetDataForPath(DependencyObject DepObject, string value)
    {
        DepObject.SetValue(DataForPathProperty, value);
    }

    public static string GetDataForPath(DependencyObject DepObject)
    {
        return (string)DepObject.GetValue(DataForPathProperty);
    }

    #endregion

    static MyDependencyClass()
    {
        PropertyMetadata MyPropertyMetadata = new PropertyMetadata(String.Empty);

        DataForPathProperty = DependencyProperty.RegisterAttached("DataForPath",
                                                            typeof(string),
                                                            typeof(MyDependencyClass),
                                                            MyPropertyMetadata);
    }
}

     <StackPanel Orientation="Horizontal">
        <Button Height="22" IsEnabled="False">
            <Polygon Points="4,0 4,5 5,5 2.5,10 0,5 1,5 1,0 " 
                     Fill="{Binding (TextElement.Foreground), RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentPresenter}}}">
                <Polygon.LayoutTransform>
                    <RotateTransform Angle="90"></RotateTransform>
                </Polygon.LayoutTransform>
            </Polygon>
        </Button>
        <Button Height="22" IsEnabled="True">
            <Polygon Points="4,0 4,5 5,5 2.5,10 0,5 1,5 1,0 " 
                     Fill="{Binding (TextElement.Foreground), RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentPresenter}}}">
                <Polygon.LayoutTransform>
                    <RotateTransform Angle="180"></RotateTransform>
                </Polygon.LayoutTransform>
            </Polygon>
        </Button>
    </StackPanel>