[C#/WINUI3/COMMUNITY TOOLKIT/.NET8] DispatcherQueueExtensions 클래스 : EnqueueAsync 확장 메소드를 사용해 백그라운드 쓰레드에서 UI 작업하기

■ DispatcherQueueExtensions 클래스의 EnqueueAsync 확장 메소드를 사용해 백그라운드 쓰레드에서 UI를 작업하는 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">
    <TextBlock Name="textBlock"
        HorizontalAlignment="Center"
        VerticalAlignment="Center"
        FontSize="20"
        Text="Hello, World!" />
</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">

<TextBlock Name="textBlock"

HorizontalAlignment="Center"

VerticalAlignment="Center"

FontSize="20"

Text="Hello, World!" />

</Page>

▶ MainPage.xaml.cs


using System.Threading.Tasks;

using Microsoft.UI.Dispatching;
using Microsoft.UI.Xaml;
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();

        Loaded += Page_Loaded;
    }

    #endregion

    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Private

    #region 페이지 로드시 처리하기 - Page_Loaded(sender, e)

    /// <summary>
    /// 페이지 로드시 처리하기
    /// </summary>
    /// <param name="sender">이벤트 발생자</param>
    /// <param name="e">이벤트 인자</param>
    private async void Page_Loaded(object sender, RoutedEventArgs e)
    {
        DispatcherQueue dispatcherQueue = DispatcherQueue.GetForCurrentThread();

        await dispatcherQueue.EnqueueAsync
        (
            async () =>
            {
                await Task.Delay(1000);

                this.textBlock.Text = "Hello from a background thread!";
            }
        );
    }

    #endregion
}

using System.Threading.Tasks;

using Microsoft.UI.Dispatching;

using Microsoft.UI.Xaml;

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();

Loaded += Page_Loaded;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

#region 페이지 로드시 처리하기 - Page_Loaded(sender, e)

/// <summary>

/// 페이지 로드시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private async void Page_Loaded(object sender, RoutedEventArgs e)

{

DispatcherQueue dispatcherQueue = DispatcherQueue.GetForCurrentThread();

await dispatcherQueue.EnqueueAsync

(

async () =>

{

await Task.Delay(1000);

this.textBlock.Text = "Hello from a background thread!";

}

);

}

#endregion

}

TestProject.zip