[C#/WINUI3/COMMUNITY TOOLKIT/.NET8] FrameworkElementExtensions 클래스 : FindChild/FindChildren 확장 메소드를 사용해 논리 트리 자식 구하기

■ FrameworkElementExtensions 클래스의 FindChild/FindChildren 확장 메소드를 사용해 논리 트리의 자식을 구하는 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"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <StackPanel Name="stackPanel"
        HorizontalAlignment="Center"
        VerticalAlignment="Center"
        Spacing="10">
        <Button Name="button"
            Width="200"
            Height="200">
            <TextBlock Name="textBlock"
                FontSize="20"
                Text="Test" />
        </Button>
    </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"

Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"

FontFamily="나눔고딕코딩"

FontSize="16">

<StackPanel Name="stackPanel"

HorizontalAlignment="Center"

VerticalAlignment="Center"

Spacing="10">

<Button Name="button"

Width="200"

Height="200">

<TextBlock Name="textBlock"

FontSize="20"

Text="Test" />

</Button>

</StackPanel>

</Page>

▶ MainPage.xaml.cs


using System.Linq;
using System.Collections.Generic;

using Microsoft.UI.Xaml.Controls;

using CommunityToolkit.WinUI;

namespace TestProject;

/// <summary>
/// 메인 페이지
/// </summary>
public sealed partial class MainPage : Page
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 생성자 - MainPage()

    /// <summary>
    /// 생성자
    /// </summary>
    public MainPage()
    {
        InitializeComponent();

        StackPanel stackPanel = this.FindChild("stackPanel") as StackPanel;

        Button button = stackPanel.FindChild("button") as Button;

        IEnumerable<TextBlock> textBlockEnumerable = button.FindChildren().OfType<TextBlock>();

        foreach(TextBlock textBlock in textBlockEnumerable)
        {
            continue;
        }
    }

    #endregion
}

using System.Linq;

using System.Collections.Generic;

using Microsoft.UI.Xaml.Controls;

using CommunityToolkit.WinUI;

namespace TestProject;

/// <summary>

/// 메인 페이지

/// </summary>

public sealed partial class MainPage : Page

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainPage()

/// <summary>

/// 생성자

/// </summary>

public MainPage()

{

InitializeComponent();

StackPanel stackPanel = this.FindChild("stackPanel") as StackPanel;

Button button = stackPanel.FindChild("button") as Button;

IEnumerable<TextBlock> textBlockEnumerable = button.FindChildren().OfType<TextBlock>();

foreach(TextBlock textBlock in textBlockEnumerable)

{

continue;

}

#endregion

}

TestProject.zip