6.6 Dependency Injection 및 GenericHost 사용

AvaloniaUI에서도 WPF와 동일하게 GenericHost 패턴 적용:

// App.axaml.cs
namespace MyApp;

using Avalonia;
using Avalonia.Controls.ApplicationLifetimes;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

public partial class App : Application
{
    private IHost? _host;

    public override void Initialize()
    {
        AvaloniaXamlLoader.Load(this);
    }

    public override void OnFrameworkInitializationCompleted()
    {
        // GenericHost 생성 및 서비스 등록
        // Create GenericHost and register services
        _host = Host.CreateDefaultBuilder()
            .ConfigureServices((context, services) =>
            {
                // Services 등록
                // Register services
                services.AddSingleton<IUserRepository, UserRepository>();
                services.AddSingleton<IUserService, UserService>();
                services.AddTransient<IDialogService, DialogService>();

                // ViewModels 등록
                // Register ViewModels
                services.AddTransient<MainViewModel>();

                // Views 등록
                // Register Views
                services.AddSingleton<MainWindow>();
            })
            .Build();

        if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
        {
            desktop.MainWindow = _host.Services.GetRequiredService<MainWindow>();
        }

        base.OnFrameworkInitializationCompleted();
    }
}