CODEWITHSUNDEEP
c#asp.net-coredependency-injectionautofacasp.net-core-3.0
mr-dortaj
mr-dortaj

Reputation: 862

'ConfigureServices returning a System.IServiceProvider isn't supported.'

I need ti use this AutoFac in ASP core 3.0

When I use this code in startu up:

public IServiceProvider ConfigureServices(IServiceCollection services)
{
    services.AddControllers();
    return services.BuildAutofacServiceProvider();
}

It show me this error:

'ConfigureServices returning an System.IServiceProvider isn't supported.'

And I change the program.cs by this:

public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run();
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
        .UseServiceProviderFactory(new AutofacServiceProviderFactory())
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            });
}

But it not solved.

This is BuildAutofacServiceProvider() Code:

public static IServiceProvider BuildAutofacServiceProvider(this IServiceCollection services)
{
    var ContainerBuilder = new ContainerBuilder();
    ContainerBuilder.Populate(services);
    ContainerBuilder.AddService();
    var container = ContainerBuilder.Build();

    return new AutofacServiceProvider(container);
}

How can I solve this problem?

Upvotes: 29

Views: 17661

Answers (4)

Sadegh Tohidi
Sadegh Tohidi

Reputation: 21

you must change program.c

public static void Main(string[] args)
{
    CreateWebHostBuilder(args).Build().Run();
}

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
   WebHost.CreateDefaultBuilder(args)
       .ConfigureLogging(options => options.ClearProviders())
       .UseStartup<Startup>();

Upvotes: 0

MaryamTaghavi
MaryamTaghavi

Reputation: 1

Instead of Host use WebHost in Program.cs

It work for me ...

Upvotes: -1

R.Titov
R.Titov

Reputation: 3303

Instead of Host in Program.cs you can use WebHost

public class Program
{
  public static void Main(string[] args)
  {
    CreateWebHostBuilder(args).Build().Run();
  }

  public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
      .UseStartup<Startup>();
}

In this case following code works

public IServiceProvider ConfigureServices(IServiceCollection services)
{
  ...
  var builder = new ContainerBuilder();

  builder.Populate(services);
  var container = builder.Build();
  return new AutofacServiceProvider(container);
}

Upvotes: 9

Nkosi
Nkosi

Reputation: 247591

Startup syntax has changed for configuring Autofac for ASP.NET Core 3.0+

In addition to using the following on the host builder

.UseServiceProviderFactory(new AutofacServiceProviderFactory())

In Startup do the following format

public void ConfigureServices(IServiceCollection services) {
    //... normal registration here

    // Add services to the collection. Don't build or return
    // any IServiceProvider or the ConfigureContainer method
    // won't get called.

    services.AddControllers();
}

// ConfigureContainer is where you can register things directly
// with Autofac. This runs after ConfigureServices so the things
// here will override registrations made in ConfigureServices.
// Don't build the container; that gets done for you. If you
// need a reference to the container, you need to use the
// "Without ConfigureContainer" mechanism shown later.
public void ConfigureContainer(ContainerBuilder builder) {
    // Register your own things directly with Autofac
    builder.AddMyCustomService();

    //...
}

Reference Autofac documentation for ASP.NET Core 3.0+

Upvotes: 38

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