첨부 소스 코드는 나눔고딕코딩 폰트를 사용합니다.
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TestProject.zip
4.11MB

▶ MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml">
    <StackLayout
        HorizontalOptions="Center"
        VerticalOptions="Center"
        Spacing="10">
        <Image x:Name="image"
            HorizontalOptions="Center"
            WidthRequest="300"
            HeightRequest="300"
            BackgroundColor="Beige"
            Aspect="Fill" />
        <Button x:Name="saveButton"
            HorizontalOptions="Center"
            Text="이미지 저장하기" />
    </StackLayout>
</ContentPage>

 

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▶ MainPage.xaml.cs

using System.Reflection;

using Microsoft.Maui.Graphics.Platform;

namespace TestProject;

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

    #region 생성자 - MainPage()

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

        this.saveButton.Clicked += saveButton_Clicked;
    }

    #endregion

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

    #region 이미지 저장하기 버튼 클릭시 처리하기 - saveButton_Clicked(sender, e)

    /// <summary>
    /// 이미지 저장하기 버튼 클릭시 처리하기
    /// </summary>
    /// <param name="sender">이벤트 발생자</param>
    /// <param name="e">이벤트 인자</param>
    private void saveButton_Clicked(object sender, EventArgs e)
    {
        Microsoft.Maui.Graphics.IImage sourceImage;

        using(Stream sourceStream = Assembly.GetExecutingAssembly().GetManifestResourceStream("TestProject.IMAGE.sample.png"))
        {
            sourceImage = PlatformImage.FromStream(sourceStream);
        }

        string filePath = Path.Combine(FileSystem.CacheDirectory, "sample.png");

        using(FileStream saveStream = new FileStream(filePath, FileMode.Create, FileAccess.Write))
        {
            sourceImage.Save(saveStream);
        }

        using(FileStream loadStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
        {
            this.image.Source = ImageSource.FromStream(() => loadStream);
        }
    }

    #endregion
}
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