wpf 属性值的继承

    //自定义canvas 布局
    class CustomCanvas : Canvas
    {        

        public static readonly DependencyProperty Text2InheritProperty =
                DependencyProperty.RegisterAttached("Text2Inherit", // 注册附加属性
                                typeof(string),
                                typeof(CustomCanvas),
                                new FrameworkPropertyMetadata("DefaultTextOfCanvas", FrameworkPropertyMetadataOptions.Inherits));  //设置依赖属性的默认值

        public string Text2Inherit
        {
            set { SetValue(Text2InheritProperty, value); }
            get { return (string)GetValue(Text2InheritProperty); }
        }
    }

    class CustomButton : Button
    {
        public static readonly DependencyProperty Text2InheritProperty; //依赖属性 
        
        public string Text2Inherit
        {
            set { SetValue(Text2InheritProperty, value); }                  //新设置属性值保存在本地的effectiveValue集合中存放

            get { return (string)GetValue(Text2InheritProperty); }
        }

        static CustomButton()
        {
            //设置的依赖属性值的继承       
            Text2InheritProperty = CustomCanvas.Text2InheritProperty.AddOwner(//添加多个依赖属性的共享者
                typeof(CustomButton), new FrameworkPropertyMetadata("DefaultTextOfButton", FrameworkPropertyMetadataOptions.Inherits));

        }
    }

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions> 
        
        <local:CustomCanvas x:Name="canvas0" Width="500" Grid.Row="0">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="Default Text2Inherit of CustomCanvas is: "/>
                <TextBlock x:Name="textBlock1"/>
            </StackPanel>
        </local:CustomCanvas>
        
        <local:CustomCanvas x:Name="canvas1" Width="500" Grid.Row="1">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="Default Text2Inherit of CustomButton is: "/>
                <local:CustomButton x:Name="button1"/>
            </StackPanel>
        </local:CustomCanvas>
        
        <local:CustomCanvas x:Name="canvas2" Width="500" Grid.Row="2" Text2Inherit="TEXT from Canvas!!!">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="After inheriting,Text2Inherit is: "/>
                <local:CustomButton x:Name="button2"/>
            </StackPanel>
        </local:CustomCanvas>
        
    </Grid>