问新的DbContext与DbContext在WPF应用中的构造器注入

EN

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        using (AppDbContext context = new AppDbContext())
        {
            var people = context.People.ToList();
            // Do stuff with people
        }
    }
}

public class AppDbContext : DbContext
{
    public DbSet<Person> People { get; set; }

    public AppDbContext()
    {

    }

    public AppDbContext(DbContextOptions options) : base(options)
    {

    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer({DB_CONNECTION_STRING});

        base.OnConfiguring(optionsBuilder);
    }
}

public partial class MainWindow : Window
{
    private readonly AppDbContext context;

    public MainWindow(AppDbContext context)
    {
        InitializeComponent();
        this.context = context;

        var people = context.People.ToList();
        // Do stuff with people
   }
}

public partial class App : Application
{
    public static IHost? AppHost { get; private set; }

    public App()
    {
        var builder = Host.CreateDefaultBuilder();

        AppHost = builder.ConfigureServices((hostContext, services) =>
        {
            services.AddSingleton<MainWindow>();
            services.AddDbContext<AppDbContext>(options => 
                options.UseSqlServer({DB_CONNECTION_STRING}));
        }).Build();
    }

    protected override async void OnStartup(StartupEventArgs e)
    {
        await AppHost!.StartAsync();

        AppHost.Services.GetRequiredService<MainWindow>().Show();

        base.OnStartup(e);
    }

    protected override async void OnExit(ExitEventArgs e)
    {
        await AppHost!.StopAsync();

        base.OnExit(e);
    }
}