Dependency injection in WPF project with .net core

DI WPF-C#.md

Dependency injection in WPF project with .net core

Delete StartupUri="MainWindow.xaml" from App.xaml

Install packages :

Microsoft.Extensions.Configuration.Json
Microsoft.Extensions.DependencyInjection
Microsoft.Extensions.Options.ConfigurationExtensions

Add the file appsettings.json in the root of the project to use it for configuration.

Override OnStartup method in App.Xaml.Cs class :

public IServiceProvider ServiceProvider { get; private set; }

public IConfiguration Configuration { get; private set; }

protected override void OnStartup(StartupEventArgs e)
{
    var builder = new ConfigurationBuilder()
     .SetBasePath(Directory.GetCurrentDirectory())
     .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

    Configuration = builder.Build();

    var serviceCollection = new ServiceCollection();
    ConfigureServices(serviceCollection);

    ServiceProvider = serviceCollection.BuildServiceProvider();

    var mainWindow = ServiceProvider.GetRequiredService<MainWindow>();
    mainWindow.Show();
}

private void ConfigureServices(IServiceCollection services)
{
    services.Configure<AppSettings>(Configuration.GetSection(nameof(AppSettings)));

    services.AddTransient(typeof(MainWindow));
}