<StackPanel Name="StackPanelOut">
    <StackPanel Name="StackPanelIn">
        <!--绑定元素-->
        <Slider Name="sliderFont" Maximum="40" Minimum="10" Value="20" TickPlacement="BottomRight"  TickFrequency="1" IsSnapToTickEnabled="True" Height="Auto" Margin="5" ></Slider>
        <!--将某一属性绑定到上一个元素（ElementName），绑定值（Path），绑定模式（默认单向）-->
        <Label FontSize="{Binding ElementName=sliderFont,Path=Value,Mode=TwoWay}" Content="{Binding ElementName=sliderFont ,Path=Value}"></Label>

        <!--将某一属性，绑定到非元素资源-->
        <Label Content="{Binding Source={x:Static SystemFonts.IconFontFamily}, Path=Source}"/>
        <!--绑定到静态资源-->
        <Label Content="{Binding Source={StaticResource MyFont}, Path=Source}"></Label>
        <!--绑定到自定义资源-->
        <Label>
            <!--绑定到父类的数据-->
            <Label.Content>
                <Binding Path="Title">
                    <!--绑定到父类的值-->
                    <Binding.RelativeSource>
                        <!--绑定模式，绑定的类型-->
                        <RelativeSource Mode="FindAncestor" AncestorType="{x:Type Window}"/>
                    </Binding.RelativeSource>
                </Binding>
            </Label.Content>
        </Label>
        <!--针对上一个的简写，AncestorLevel在元素树上向上查找的等级-->
        <Label Content="{Binding Path=Name,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type StackPanel}, AncestorLevel=2}}"/>

        <!--多元素，绑定同一数据时的处理（处理相同源）-->
        <Label Content="{Binding Source={x:Static SystemFonts.IconFontFamily}, Path=Source}"/>
        <Label Content="{Binding Source={x:Static SystemFonts.IconFontFamily}, Path=LineSpacing}"/>
        <Label Content="{Binding Source={x:Static SystemFonts.IconFontFamily}, Path= FamilyTypefaces[0].Style}"/>           
        <!--将上面绑定的数据 保存在父级（也可以是更高的父级）的DataContext中-->
        <StackPanel DataContext="{x:Static SystemFonts.IconFontFamily}">
            <!--空出Source，WPF会自动向上查找父级中DataContext不为null的数据，并应用。如果找不到或者错误，则不显示-->
            <Label Content="{Binding  Path=Source}"/>
            <Label Content="{Binding  Path=LineSpacing}"/>
            <Label Content="{Binding  Path= FamilyTypefaces[0].Style}"/>
        </StackPanel>
    </StackPanel>
</StackPanel>