Using DependencyInjection and configuration file (json)

YouTubeViewers.WPF/App.xaml.cs

@@ -1,4 +1,7 @@
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 using System;
 using System.Collections.Generic;
 using System.Configuration;
@@ -18,59 +21,75 @@ namespace YouTubeViewers.WPF;
 
 public partial class App : Application
 {
-    private readonly ModalNavigationStore _modalNavigationStore;
-    private readonly YouTubeViewersDbContextFactory _youTubeViewersDbContextFactory;
-    private readonly IGetAllYouTubeViewersQuery _getAllYouTubeViewersQuery;
-    private readonly ICreateYouTubeViewerCommand _createYouTubeViewerCommand;
-    private readonly IUpdateYouTubeViewerCommand _updateYouTubeViewerCommand;
-    private readonly IDeleteYouTubeViewerCommand _deleteYouTubeViewerCommand;
-    private readonly YouTubeViewersStore _youTubeViewersStore;
-    private readonly SelectedYouTubeViewerStore _selectedYouTubeViewerStore;
+
+    private readonly IHost _host;
 
     public App()
     {
-        string connectionString = "Data Source=YouTubeViewers.db";
-        _modalNavigationStore = new ModalNavigationStore();
-        _youTubeViewersDbContextFactory = new YouTubeViewersDbContextFactory(
-             new DbContextOptionsBuilder()
-                .UseSqlite(connectionString)
-                .Options
-            );
-        _getAllYouTubeViewersQuery = new GetAllYouTubeViewersQuery(_youTubeViewersDbContextFactory);
-        _createYouTubeViewerCommand = new CreateYouTubeViewerCommand(_youTubeViewersDbContextFactory);
-        _updateYouTubeViewerCommand = new UpdateYouTubeViewerCommand(_youTubeViewersDbContextFactory);
-        _deleteYouTubeViewerCommand = new DeleteYouTubeViewerCommand(_youTubeViewersDbContextFactory);
-        _youTubeViewersStore = new YouTubeViewersStore(
-            _getAllYouTubeViewersQuery,
-            _createYouTubeViewerCommand,
-            _updateYouTubeViewerCommand,
-            _deleteYouTubeViewerCommand
-            );
-        _selectedYouTubeViewerStore = new SelectedYouTubeViewerStore(_youTubeViewersStore);
+        _host = Host.CreateDefaultBuilder()
+            .ConfigureServices((context, services) =>
+            {
+                string connectionString = context.Configuration.GetConnectionString("sqlite");
+                services.AddSingleton<DbContextOptions>(
+                    new DbContextOptionsBuilder()
+                        .UseSqlite(connectionString)
+                        .Options);
+                services.AddSingleton<YouTubeViewersDbContextFactory>();
+
+                services.AddSingleton<IGetAllYouTubeViewersQuery,GetAllYouTubeViewersQuery>();
+                services.AddSingleton<ICreateYouTubeViewerCommand,CreateYouTubeViewerCommand>();
+                services.AddSingleton<IUpdateYouTubeViewerCommand,UpdateYouTubeViewerCommand>();
+                services.AddSingleton<IDeleteYouTubeViewerCommand,DeleteYouTubeViewerCommand>();
+
+                services.AddSingleton<ModalNavigationStore>();
+                services.AddSingleton<YouTubeViewersStore>();
+                services.AddSingleton<SelectedYouTubeViewerStore>();
+
+                services.AddTransient<YouTubeViewersViewModel>(CreateYouTubeViewersViewModel);
+                services.AddSingleton<MainViewModel>();
+
+                services.AddSingleton<MainWindow>((services) => new MainWindow()
+                {
+                    DataContext = services.GetRequiredService<MainViewModel>()
+                });
+            })
+            .Build();
+
     }
 
+
     protected override void OnStartup(StartupEventArgs e)
     {
-        using(YouTubeViewersDbContext context = _youTubeViewersDbContextFactory.Create())
+        _host.Start();
+
+        var youTubeViewersDbContextFactory = _host.Services.GetRequiredService<YouTubeViewersDbContextFactory>();
+        using (YouTubeViewersDbContext context = youTubeViewersDbContextFactory.Create())
         {
             //context.Database.EnsureCreated();
             context.Database.Migrate();
         }
 
-        YouTubeViewersViewModel youTubeViewersViewModel = YouTubeViewersViewModel.LoadViewModel(
-            _youTubeViewersStore,
-            _selectedYouTubeViewerStore,
-            _modalNavigationStore);
-
-        MainWindow = new MainWindow()
-        {
-            DataContext = new MainViewModel(_modalNavigationStore, youTubeViewersViewModel)
-        };
-
+        MainWindow = _host.Services.GetRequiredService<MainWindow>();
         MainWindow.Show();
 
         base.OnStartup(e);
     }
+
+    protected override void OnExit(ExitEventArgs e)
+    {
+        _host.StopAsync();
+        _host.Dispose();
+        base.OnExit(e);
+    }
+
+    private YouTubeViewersViewModel CreateYouTubeViewersViewModel(IServiceProvider services)
+    {
+        return YouTubeViewersViewModel.LoadViewModel(
+            services.GetRequiredService<YouTubeViewersStore>(),
+            services.GetRequiredService<SelectedYouTubeViewerStore>(),
+            services.GetRequiredService<ModalNavigationStore>());
+    }
+
 }
 
 

YouTubeViewers.WPF/YouTubeViewers.WPF.csproj

@@ -10,6 +10,7 @@
   <ItemGroup>
     <PackageReference Include="DropdownMenu.WPF" Version="1.0.0" />
     <PackageReference Include="LoadingSpinner.WPF" Version="1.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Hosting" Version="6.0.1" />
     <PackageReference Include="SimpleModal.WPF" Version="1.0.0" />
   </ItemGroup>
 
@@ -18,4 +19,10 @@
     <ProjectReference Include="..\YouTubeViewers.EntityFramework\YouTubeViewers.EntityFramework.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Update="appsettings.json">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
 </Project>

YouTubeViewers.WPF/appsettings.json

@@ -0,0 +1,5 @@
+{
+	"ConnectionStrings": {
+		"sqlite": "Data Source=YouTubeViewers.db"
+	}
+}