[C#/WINUI3/COMMUNITY TOOLKIT/.NET8] FrameworkElementExtensions 엘리먼트 : AncestorType/Ancestor 첨부 속성을 사용해 조상 엘리먼트 참조하기

■ FrameworkElementExtensions 엘리먼트의 AncestorType/Ancestor 첨부 속성을 사용해 조상 엘리먼트를 참조하는 방법을 보여준다.

※ 비주얼 스튜디오에서 TestProject(Unpackaged) 모드로 빌드한다.
※ TestProject.csproj 프로젝트 파일에서 WindowsPackageType 태그를 None으로 추가했다.

▶ MainPage.xaml


<?xml version="1.0" encoding="utf-8"?>
<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:ctw="using:CommunityToolkit.WinUI"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <StackPanel
        HorizontalAlignment="Center"
        VerticalAlignment="Center"
        Margin="50"
        Spacing="{x:Bind slider.Value, Mode=OneWay}">
        <Slider Name="slider"
            Minimum="5"
            Maximum="20"
            StepFrequency="5"
            Value="10" />
        <TextBlock Text="This is some text in a StackPanel with Spacing :" />
        <TextBlock
            ctw:FrameworkElementExtensions.AncestorType="StackPanel"
            Text="{Binding (ctw:FrameworkElementExtensions.Ancestor).Spacing, RelativeSource={RelativeSource Self}}" />
    </StackPanel>
</Page>

<?xml version="1.0" encoding="utf-8"?>

<Page x:Class="TestProject.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:ctw="using:CommunityToolkit.WinUI"

Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"

FontFamily="나눔고딕코딩"

FontSize="16">

<StackPanel

HorizontalAlignment="Center"

VerticalAlignment="Center"

Margin="50"

Spacing="{x:Bind slider.Value, Mode=OneWay}">

<Slider Name="slider"

Minimum="5"

Maximum="20"

StepFrequency="5"

Value="10" />

<TextBlock

ctw:FrameworkElementExtensions.AncestorType="StackPanel"

Text="{Binding (ctw:FrameworkElementExtensions.Ancestor).Spacing, RelativeSource={RelativeSource Self}}" />

</StackPanel>

</Page>

TestProject.zip