C# 更改WPF图表工具包图例中显示的颜色

我有以下样式，删除数据点并随机为我的线系列图生成线颜色

<Style x:Key="LineDataPointStyle" 
        TargetType="ChartingToolkit:LineDataPoint">
    <Setter Property="Foreground" Value="DarkGreen"/>
    <Setter Property="IsTabStop" Value="False"/>
    <Setter Property="Width" Value="NaN"/>
    <Setter Property="Height" Value="NaN"/>
    <Setter Property="Background" 
            Value="{Binding RelativeSource={RelativeSource Self}, 
                            Converter={StaticResource ColorBrushConverter}}"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="ChartingToolkit:LineDataPoint">
                <Grid x:Name="Root" Opacity="0"/>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

这会生成随机颜色的线条，但图例的颜色不同；要么由库本身自动生成，要么通过样式模板调用my converter

---

我如何才能让图例打印出正确的颜色？

我做了类似的事情，我用变化的颜色生成绘图，但这些颜色是从首选列表中随机选择的（我有黑色背景，有些颜色在黑色上面效果不太好）。我从后面的代码设置颜色，我不确定这是你能做的

在你的情况下，我会尝试以下方法：

//If you declare your style in a resource dictionary, get that resource first

<FreezableControl Property="{Binding RelativeSource={RelativeSource TemplatedParent},
                                     Path=Background}" />

ResourceDictionary resD=（ResourceDictionary）Application.LoadComponent（新Uri（“ResourcesPlot\\ResourceDictionaryPlot.xaml”，UriKind.Relative））

希望这能奏效

编辑：

对于图例，我使用此选项（我有一个额外的复选框用于显示/隐藏特定绘图）


注意：这是对所问的
Killercam
问题的回答。这个问题的答案特别适合他的赏金，所以应他的要求，我在这里发表

在这个答案中，
按钮
控件用于演示如何使用模板

第一部分：ControlTemplate中的绑定

<Window.Resources>
    <Style x:Key="TestButtonStyle" TargetType="{x:Type Button}">
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="IsTabStop" Value="False" />

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <!-- Here we are set Tag for Border Background -->
                    <Border Background="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Tag}" 
                            BorderThickness="{TemplateBinding BorderThickness}">

                        <Grid>
                            <Rectangle Width="24" 
                                       Height="24" 
                                       Fill="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Background}" 
                                       Stroke="{TemplateBinding BorderBrush}" />

                            <ContentPresenter Content="{TemplateBinding Content}" 
                                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

<Grid>
    <Button Name="TestButton"
            Style="{StaticResource TestButtonStyle}"
            Content="Test"
            HorizontalContentAlignment="Center"
            VerticalContentAlignment="Center"
            Tag="Green"
            Background="Aquamarine"
            Width="100"
            Height="100" />
</Grid>

如果要在
控制模板
中使用绑定，应使用以下构造：

<ControlTemplate TargetType="{x:Type SomeControl}">
    <Rectangle Fill="{TemplateBinding Background}" />

此外，您还可以始终使用
模板绑定的替代方法：

<Rectangle Fill="{Binding RelativeSource={RelativeSource TemplatedParent},
                          Path=Background}" />

输出


这里为
矩形
，设置两种颜色：默认为
矩形
，在标签中为
边框
。我认为这不是一个好的解决方案，原因如下：


如果边框和矩形需要设置不同的值，例如：背景、边框厚度、边框笔刷等，一个
标记
是不够的

同一个名字的财产必须明确其目的，一个名字“标签”我们什么也没有说


从这些缺点中可以得出结论，我们应该找到一个替代方案，作为替代方案，我使用一个具有附加依赖属性的扩展程序类

扩展器类
buttonnext.cs

public static class ButtonExt
{
    #region RectangleBackground Property

    public static readonly DependencyProperty RectangleBackgroundProperty;

    public static void SetRectangleBackground(DependencyObject DepObject, Brush value)
    {
        DepObject.SetValue(RectangleBackgroundProperty, value);
    }

    public static Brush GetRectangleBackground(DependencyObject DepObject)
    {
        return (Brush)DepObject.GetValue(RectangleBackgroundProperty);
    }

    #endregion

    #region RectangleBorderBrush Property

    public static readonly DependencyProperty RectangleBorderBrushProperty;

    public static void SetRectangleBorderBrush(DependencyObject DepObject, Brush value)
    {
        DepObject.SetValue(RectangleBorderBrushProperty, value);
    }

    public static Brush GetRectangleBorderBrush(DependencyObject DepObject)
    {
        return (Brush)DepObject.GetValue(RectangleBorderBrushProperty);
    }

    #endregion       

    #region Button Constructor

    static ButtonExt()
    {
        #region RectangleBackground

        PropertyMetadata BrushPropertyMetadata = new PropertyMetadata(Brushes.Transparent);

        RectangleBackgroundProperty = DependencyProperty.RegisterAttached("RectangleBackground",
                                                            typeof(Brush),
                                                            typeof(ButtonExt),
                                                            BrushPropertyMetadata);

        #endregion

        #region RectangleBorderBrush

        RectangleBorderBrushProperty = DependencyProperty.RegisterAttached("RectangleBorderBrush",
                                                            typeof(Brush),
                                                            typeof(ButtonExt),
                                                            BrushPropertyMetadata);

        #endregion
    }

    #endregion
}

MainWindow.xaml

<Window.Resources>
    <Style x:Key="TestButtonExtensionStyle" TargetType="{x:Type Button}">
        <Setter Property="Width" Value="80" />
        <Setter Property="Height" Value="80" />
        <Setter Property="Background" Value="Green" />
        <Setter Property="BorderBrush" Value="Pink" />
        <Setter Property="BorderThickness" Value="4" />

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Border Background="{TemplateBinding Background}" 
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}">

                        <Grid>
                            <Rectangle Fill="{TemplateBinding PropertiesExtension:ButtonExt.RectangleBackground}" 
                                       Stroke="{TemplateBinding PropertiesExtension:ButtonExt.RectangleBorderBrush}"
                                       Width="30" 
                                       Height="30" />

                            <ContentPresenter Content="{TemplateBinding Content}" 
                                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

<Grid>
    <Button Style="{StaticResource TestButtonExtensionStyle}"
            PropertiesExtension:ButtonExt.RectangleBackground="Aquamarine"
            PropertiesExtension:ButtonExt.RectangleBorderBrush="Black"
            Content="Test" />
</Grid>

然后，与他们合作将如下所示：

Set

Get

但在我们的例子中，它并不是那么简单。当我在更新值时使用附加的依赖属性问题时​​没有。但是在我们的例子中，属性在模板中，在我的例子中没有更新按钮。我试图在绑定和属性声明中设置
Mode=TwoWay
，
UpdateSourceTrigger=PropertyChanged
，但没有用

请注意，对于属性设置，会有一个新值，但不会从模板发出属性已更新的通知。也许我错了，而你已经将工作，或者可能它是专门制作的，例如，以避免内存泄漏

在任何情况下，最好不要直接更新dependency属性，并将
模型的属性绑定到它，然后在
视图模型中设置值

例如：

<Button Style="{StaticResource TestButtonExtensionStyle}"
        adp:ButtonExt.RectangleBackground="{Binding Path=Model.RectBackground,
                                                    Mode=TwoWay, 
                                                    UpdateSourceTrigger=PropertyChanged}"
        adp:ButtonExt.RectangleBorderBrush="{Binding Path=Model.RectBorderBrush,
                                                     Mode=TwoWay, 
                                                     UpdateSourceTrigger=PropertyChanged}" />



其中
RectBackground
和
RectBorderBrush
实现
INotifyPropertyChanged
接口

在这种情况下，另一种选择是，不要使用依赖项属性，而使用控件的
DataTemplate
<代码>数据模板
非常适合MVVM，非常灵活和动态

例如，使用
DataTemplate
，您可以看到我的答案：


嗨，我看到你编辑了这个问题。。。您是否尝试过从代码隐藏设置颜色？我尝试过，但您的解决方案无效。此外，我希望避免代码隐藏中的任何代码。我认为这里的解决方案是将控制图例标记颜色的属性绑定到绘图的线颜色。问题是我不知道图例的什么属性决定了颜色？我在答案中添加了一个小编辑。评论时间太长了。
<Window.Resources>
    <Style x:Key="TestButtonStyle" TargetType="{x:Type Button}">
        <Setter Property="BorderThickness" Value="0" />
        <Setter Property="IsTabStop" Value="False" />

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <!-- Here we are set Tag for Border Background -->
                    <Border Background="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Tag}" 
                            BorderThickness="{TemplateBinding BorderThickness}">

                        <Grid>
                            <Rectangle Width="24" 
                                       Height="24" 
                                       Fill="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Background}" 
                                       Stroke="{TemplateBinding BorderBrush}" />

                            <ContentPresenter Content="{TemplateBinding Content}" 
                                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

<Grid>
    <Button Name="TestButton"
            Style="{StaticResource TestButtonStyle}"
            Content="Test"
            HorizontalContentAlignment="Center"
            VerticalContentAlignment="Center"
            Tag="Green"
            Background="Aquamarine"
            Width="100"
            Height="100" />
</Grid>

public static class ButtonExt
{
    #region RectangleBackground Property

    public static readonly DependencyProperty RectangleBackgroundProperty;

    public static void SetRectangleBackground(DependencyObject DepObject, Brush value)
    {
        DepObject.SetValue(RectangleBackgroundProperty, value);
    }

    public static Brush GetRectangleBackground(DependencyObject DepObject)
    {
        return (Brush)DepObject.GetValue(RectangleBackgroundProperty);
    }

    #endregion

    #region RectangleBorderBrush Property

    public static readonly DependencyProperty RectangleBorderBrushProperty;

    public static void SetRectangleBorderBrush(DependencyObject DepObject, Brush value)
    {
        DepObject.SetValue(RectangleBorderBrushProperty, value);
    }

    public static Brush GetRectangleBorderBrush(DependencyObject DepObject)
    {
        return (Brush)DepObject.GetValue(RectangleBorderBrushProperty);
    }

    #endregion       

    #region Button Constructor

    static ButtonExt()
    {
        #region RectangleBackground

        PropertyMetadata BrushPropertyMetadata = new PropertyMetadata(Brushes.Transparent);

        RectangleBackgroundProperty = DependencyProperty.RegisterAttached("RectangleBackground",
                                                            typeof(Brush),
                                                            typeof(ButtonExt),
                                                            BrushPropertyMetadata);

        #endregion

        #region RectangleBorderBrush

        RectangleBorderBrushProperty = DependencyProperty.RegisterAttached("RectangleBorderBrush",
                                                            typeof(Brush),
                                                            typeof(ButtonExt),
                                                            BrushPropertyMetadata);

        #endregion
    }

    #endregion
}

<Window.Resources>
    <Style x:Key="TestButtonExtensionStyle" TargetType="{x:Type Button}">
        <Setter Property="Width" Value="80" />
        <Setter Property="Height" Value="80" />
        <Setter Property="Background" Value="Green" />
        <Setter Property="BorderBrush" Value="Pink" />
        <Setter Property="BorderThickness" Value="4" />

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Button}">
                    <Border Background="{TemplateBinding Background}" 
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}">

                        <Grid>
                            <Rectangle Fill="{TemplateBinding PropertiesExtension:ButtonExt.RectangleBackground}" 
                                       Stroke="{TemplateBinding PropertiesExtension:ButtonExt.RectangleBorderBrush}"
                                       Width="30" 
                                       Height="30" />

                            <ContentPresenter Content="{TemplateBinding Content}" 
                                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                        </Grid>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

<Grid>
    <Button Style="{StaticResource TestButtonExtensionStyle}"
            PropertiesExtension:ButtonExt.RectangleBackground="Aquamarine"
            PropertiesExtension:ButtonExt.RectangleBorderBrush="Black"
            Content="Test" />
</Grid>

public static void SetRectangleBackground(DependencyObject DepObject, Brush value)
{
    DepObject.SetValue(RectangleBackgroundProperty, value);
}

public static Brush GetRectangleBackground(DependencyObject DepObject)
{
    return (Brush)DepObject.GetValue(RectangleBackgroundProperty);
}

ButtonExt.SetRectangleBackground(MyButton, Brushes.Red);

Brush MyBrush = ButtonExt.GetRectangleBackground(MyButton);

<Button Style="{StaticResource TestButtonExtensionStyle}"
        adp:ButtonExt.RectangleBackground="{Binding Path=Model.RectBackground,
                                                    Mode=TwoWay, 
                                                    UpdateSourceTrigger=PropertyChanged}"
        adp:ButtonExt.RectangleBorderBrush="{Binding Path=Model.RectBorderBrush,
                                                     Mode=TwoWay, 
                                                     UpdateSourceTrigger=PropertyChanged}" />