Prevent the service from being injected again.

Resolve #1757

framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/DependencyInjection/AbpAspNetCoreMvcConventionalDependencyRegistrar.cs

@@ -9,22 +9,36 @@ namespace Volo.Abp.AspNetCore.Mvc.DependencyInjection
 {
     public class AbpAspNetCoreMvcConventionalRegistrar : DefaultConventionalRegistrar
     {
-        protected override ServiceLifetime? GetServiceLifetimeFromClassHierarcy(Type type)
+        public override void AddType(IServiceCollection services, Type type)
         {
-            var lifeTime = base.GetServiceLifetimeFromClassHierarcy(type);
+            if (!IsMvcService(type))
-            if (lifeTime != null)
             {
-                return lifeTime;
+                return;
             }
 
-            if (IsController(type) ||
+            var lifeTime = GetMvcServiceLifetime(type);
-                IsPageModel(type) ||
+
-                IsViewComponent(type))
+            var serviceTypes = ExposedServiceExplorer.GetExposedServices(type);
+
+            TriggerServiceExposing(services, type, serviceTypes);
+
+            foreach (var serviceType in serviceTypes)
             {
-                return ServiceLifetime.Transient;
+                var serviceDescriptor = ServiceDescriptor.Describe(serviceType, type, lifeTime);
+                services.Add(serviceDescriptor);
             }
+        }
 
-            return null;
+        protected virtual bool IsMvcService(Type type)
+        {
+            return IsController(type) ||
+                   IsPageModel(type) ||
+                   IsViewComponent(type);
+        }
+
+        protected virtual ServiceLifetime GetMvcServiceLifetime(Type type)
+        {
+            return ServiceLifetime.Transient;
         }
 
         private static bool IsPageModel(Type type)

framework/test/Volo.Abp.AspNetCore.Mvc.Tests/Volo/Abp/AspNetCore/Mvc/DependencyInjection/AbpAspNetCoreMvcConventionalRegistrar_Tests.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using Microsoft.Extensions.DependencyInjection;
+using Shouldly;
+using Volo.Abp.DependencyInjection;
+using Xunit;
+
+namespace Volo.Abp.AspNetCore.Mvc.DependencyInjection
+{
+    public class AbpAspNetCoreMvcConventionalRegistrar_Tests
+    {
+        [Fact]
+        public void Should_Registered_Mvc_Service()
+        {
+            //Arrange
+            var services = new ServiceCollection();
+
+            //Act
+            services.AddConventionalRegistrar(new DefaultConventionalRegistrar());
+            services.AddConventionalRegistrar(new AbpAspNetCoreMvcConventionalRegistrar());
+
+            services.AddTypes(typeof(My_Test_PageModel), typeof(My_Test_Controller), typeof(My_Test_ViewComponent));
+
+            //Assert
+            services.ShouldContainTransient(typeof(My_Test_PageModel)); 
+            services.ShouldContainTransient(typeof(My_Test_Controller)); 
+            services.ShouldContainTransient(typeof(My_Test_ViewComponent)); 
+
+            var serviceProvider = services.BuildServiceProvider();
+            serviceProvider.GetServices<My_Test_PageModel>().Count().ShouldBe(1);
+            serviceProvider.GetServices<My_Test_Controller>().Count().ShouldBe(1);
+            serviceProvider.GetServices<My_Test_ViewComponent>().Count().ShouldBe(1);
+        }
+    }
+
+    public class My_Test_PageModel : PageModel
+    {
+
+    }
+
+    public class My_Test_Controller : Controller
+    {
+
+    }
+
+    public class My_Test_ViewComponent : ViewComponent
+    {
+
+    }
+}