Cannot add appsettings.json inside WPF project .net core 3.0

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Steps:

  • To Add the following nuget packages

      Microsoft.Extensions.Configuration
  Microsoft.Extensions.Configuration.FileExtensions
  Microsoft.Extensions.Configuration.Json
  Microsoft.Extensions.DependencyInjection

  • You would need to create and add appsettings.json manually and set copy it to output directory as copy if newer

AppSetting.json

   {
  "ConnectionStrings": {
    "BloggingDatabase": "Server=(localdb)\\mssqllocaldb;Database=EFGetStarted.ConsoleApp.NewDb;Trusted_Connection=True;"
  },
}

Program.cs (For .NetCore Console App)

static void Main(string[] args)
{
    var builder = new ConfigurationBuilder()
        .SetBasePath(Directory.GetCurrentDirectory())
        .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

    IConfigurationRoot configuration = builder.Build();

    Console.WriteLine(configuration.GetConnectionString("BloggingDatabase"));
}

App.xaml.cs (For .NET CORE WPF)

public partial class App : Application
{
    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();

      Console.WriteLine(Configuration.GetConnectionString("BloggingDatabase"));    

        var serviceCollection = new ServiceCollection();
        ConfigureServices(serviceCollection);
 
        ServiceProvider = serviceCollection.BuildServiceProvider();
 
        var mainWindow = ServiceProvider.GetRequiredService<MainWindow>();
        mainWindow.Show();
    }
 
    private void ConfigureServices(IServiceCollection services)
    {
        // ...
 
        services.AddTransient(typeof(MainWindow));
    }
}

References:

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