ValueProvider 为空 MVC

Question

我在 asp.net MVC 5 中使用这个启动类（使用 Microsoft.Extensions.DependencyInjection）

    [assembly: OwinStartupAttribute(typeof(MVC5.Startup))]
namespace MVC5
{
    public partial class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            ConfigureAuth(app);

            var services = new ServiceCollection();

            // configure all of the services required for DI
            ConfigureServices(services);           
            
            // Create a new resolver from our own default implementation
            var resolver = new MyDependencyResolver(services.BuildServiceProvider());            
            // Set the application resolver to our default resolver. This comes from "System.Web.Mvc"
            //Other services may be added elsewhere through time
            DependencyResolver.SetResolver(resolver);
        }

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddControllersAsServices(new[]
                { typeof(HomeController), typeof(AccountController), typeof(ManageController)});

            services.AddTransient<AppDbContext>();
                        
            //====================================================
            // ApplicationUserManager
            //====================================================
            // instantiation requires the following instance of the Identity database
            services.AddTransient(typeof(IUserStore<ApplicationUser>), p => new UserStore<ApplicationUser>(new IdentityContext()));

            // with the above defined, we can add the user manager class as a type
            services.AddTransient<ApplicationUserManager>();

            //====================================================
            // ApplicationSignInManager
            //====================================================
            // instantiation requires two parameters, [ApplicationUserManager] (defined above) and [IAuthenticationManager]
            services.AddTransient(typeof(Microsoft.Owin.Security.IAuthenticationManager), p => new OwinContext().Authentication);
            services.AddTransient<ApplicationSignInManager>();            

            //====================================================
            // ApplicationRoleManager
            //====================================================
            // Maps the rolemanager of identity role to the concrete role manager type
            services.AddTransient<RoleManager<IdentityRole>>();

            // Maps the role store role to the implemented type
            services.AddTransient<IRoleStore<IdentityRole, string>, RoleStore<IdentityRole>>();
            
        }

       
        /// <summary>
        /// Provides the default dependency resolver for the application - based on IDependencyResolver, which hhas just two methods.
        /// This is combined dependency resolver for MVC and WebAPI usage.
        /// </summary>
        public class MyDependencyResolver : System.Web.Mvc.IDependencyResolver, System.Web.Http.Dependencies.IDependencyResolver
        {
            protected IServiceProvider serviceProvider;
            protected IServiceScope scope = null;

            public MyDependencyResolver(IServiceProvider serviceProvider)
            {
                this.serviceProvider = serviceProvider;
            }

            public MyDependencyResolver(IServiceScope scope)
            {
                this.scope = scope;
                this.serviceProvider = scope.ServiceProvider;
            }

            public IDependencyScope BeginScope()
            {
                return new MyDependencyResolver(serviceProvider.CreateScope());
            }

            public void Dispose()
            {
                Dispose(true);
            }

            protected virtual void Dispose(bool disposing)
            {
                scope?.Dispose();
            }

            public object GetService(Type serviceType)
            {                
                var ser = this.serviceProvider.GetService(serviceType);
                return ser;
            }

            public IEnumerable<object> GetServices(Type serviceType)
            {
                return this.serviceProvider.GetServices(serviceType);
            }
        }        

    }
    public static class ServiceProviderExtensions
    {
        public static IServiceCollection AddControllersAsServices(this IServiceCollection services, IEnumerable<Type> serviceTypes)
        {
            foreach (var type in serviceTypes)
            {
                services.AddTransient(type);
            }

            return services;
        }
    }

在 ManageController 中，所有服务都被注入并且 Action 方法已准备好运行，但由于其具有 ValueProvider 的 Base Controller 为 NULL，因此控制器在执行任何工作之前就被释放了。 为什么控制器的 valueprovider 为 null 以及如何解决这个问题？

Answer 1

我将 ApplicationUserManager 和 ApplicationSignInManager 和 RoleManager 注入更改为下面的代码，现在一切正常：

...
services.AddTransient<ApplicationUserManager>(p => HttpContext.Current.GetOwinContext().GetUserManager<ApplicationUserManager>());
...
services.AddTransient<ApplicationSignInManager>(p => HttpContext.Current.GetOwinContext().Get<ApplicationSignInManager>());
...
services.AddTransient<RoleManager<IdentityRole>>(p => 
                HttpContext.Current.GetOwinContext().Get<RoleManager<IdentityRole>>());
...