WPF CommunityToolkit.mvvm implement dependency injection via ServiceBuilder and ServiceCollection

Install-Package communitytoolkit.mvvm
Install-Package Microsoft.Extensions.DependencyInjection

 

<Application x:Class="WpfApp3.App"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="clr-namespace:WpfApp3"><Application.Resources><Style TargetType="TextBlock"><Setter Property="FontSize" Value="80"/><Setter Property="HorizontalAlignment" Value="Center"/><Setter Property="VerticalAlignment" Value="Center"/><Style.Triggers><Trigger Property="IsMouseOver" Value="True"><Setter Property="FontSize" Value="150"/><Setter Property="Foreground" Value="Red"/></Trigger></Style.Triggers></Style></Application.Resources>
</Application>using System.Configuration;
using System.Data;
using System.Windows;
using CommunityToolkit.Mvvm;
using CommunityToolkit;
using System.Security.Cryptography;
using Microsoft.Extensions.DependencyInjection;namespace WpfApp3
{/// <summary>/// Interaction logic for App.xaml/// </summary>public partial class App : Application{public static IServiceProvider? ServiceProvider { get; private set; }protected override void OnStartup(StartupEventArgs e){base.OnStartup(e);ConfigureServices();var win = ServiceProvider?.GetRequiredService<MainWindow>();win.Show();}       public void ConfigureServices(){ServiceCollection services = new ServiceCollection();services.AddSingleton<IIDService, IDService>();services.AddSingleton<INameService, NameService>();services.AddSingleton<MainWindow>();services.AddSingleton<MainWindowViewModel>();ServiceProvider=services.BuildServiceProvider();}}public interface IIDService{public int GetID();}public class IDService : IIDService{public static int id = 0;public int GetID(){return Interlocked.Increment(ref id);}}public interface INameService{public string GetName();}public class NameService : INameService{static int idx = 0;public string GetName(){return $"Name_{Interlocked.Increment(ref idx)}";}}
}<Window x:Class="WpfApp3.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"xmlns:local="clr-namespace:WpfApp3"mc:Ignorable="d"WindowState="Maximized"Title="MainWindow" Height="450" Width="800"><Grid><Grid.RowDefinitions><RowDefinition/><RowDefinition/></Grid.RowDefinitions><Grid.ColumnDefinitions><ColumnDefinition/><ColumnDefinition/></Grid.ColumnDefinitions><Button Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2"Content="Load" FontSize="150"Command="{Binding LoadCommand}"/><TextBlock Text="{Binding Id}" Grid.Row="1" Grid.Column="0"/><TextBlock Text="{Binding Name}" Grid.Row="1" Grid.Column="1"/></Grid>
</Window>using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using CommunityToolkit.Mvvm;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Microsoft.Extensions.DependencyInjection;namespace WpfApp3
{/// <summary>/// Interaction logic for MainWindow.xaml/// </summary>public partial class MainWindow : Window{//MainWindowViewModel vm;public MainWindow(MainWindowViewModel vmValue){InitializeComponent();this.DataContext=vmValue;}}public class MainWindowViewModel : ObservableObject{IIDService idService;INameService nameService;public MainWindowViewModel(IIDService idServiceValue, INameService nameServiceValue){idService = idServiceValue;nameService = nameServiceValue;LoadCommand = new RelayCommand<object>(LoadCommandExecuted);}private void LoadCommandExecuted(object? obj){Id = idService.GetID();Name = nameService.GetName();}public RelayCommand<object> LoadCommand { get; set; }private int id;public int Id{get{return id;}set{SetProperty(ref id, value);}}private string name;public string Name{get{return name;}set{SetProperty(ref name, value);}}}
}