Wpf 为什么我的CustomControl中的MultiDataTrigger绑定失败？

下面是

Generic.xaml

中的代码：

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApp2.Controls">


    <Style TargetType="{x:Type local:SampleControl}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:SampleControl}">
                    <Border Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}">
                    </Border>
                    <ControlTemplate.Triggers>
                        <MultiDataTrigger>
                            <MultiDataTrigger.Conditions>
                                <Condition Property="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True" />
                                <Condition Property="{Binding RelativeSource={RelativeSource Self}, Path=MyProperty}" Value="1" />
                            </MultiDataTrigger.Conditions>
                            <MultiDataTrigger.Setters>
                                <Setter Property="Background" Value="#cde8ff"/>
                            </MultiDataTrigger.Setters>
                        </MultiDataTrigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

以下是所有文件：

程序运行后，会报告一个错误：

System.Windows.Markup.XamlParseException: 'A 'Binding' cannot be set on the 'Property' property of type 'Condition'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject.'

无论我删除

IsMouseOver

还是

MyProperty

条件绑定，它都会报告这一点

---

我的代码有什么问题？

条件.属性

不是

依赖属性

，不能是

绑定.目标

。必须使用

Condition.Binding

属性设置数据绑定：

<MultiDataTrigger>
  <MultiDataTrigger.Conditions>
    <Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True" />
    <Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=MyProperty}" Value="1" />
  </MultiDataTrigger.Conditions>
  <MultiDataTrigger.Setters>
    <Setter Property="Background" Value="#cde8ff"/>
  </MultiDataTrigger.Setters>
</MultiDataTrigger>

类似：。条件不是DependencyObject，不能绑定其属性。

<MultiDataTrigger>
  <MultiDataTrigger.Conditions>
    <Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True" />
    <Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=MyProperty}" Value="1" />
  </MultiDataTrigger.Conditions>
  <MultiDataTrigger.Setters>
    <Setter Property="Background" Value="#cde8ff"/>
  </MultiDataTrigger.Setters>
</MultiDataTrigger>

<MultiTrigger>
  <MultiTrigger.Conditions>
    <Condition Property="IsMouseOver" Value="True" />
    <Condition Property="MyProperty" Value="1" />
  </MultiTrigger.Conditions>
  <MultiTrigger.Setters>
    <Setter Property="Background" Value="#cde8ff"/>
  </MultiTrigger.Setters>
</MultiTrigger>