Demo POCO Controller for ASP.NET Core v2

PocoDemoController.cs

using System.Security.Claims;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Infrastructure;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using Microsoft.AspNetCore.Mvc.ModelBinding.Internal;
using Microsoft.AspNetCore.Mvc.ModelBinding.Validation;
using Microsoft.AspNetCore.Mvc.Routing;
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Mvc.ViewFeatures.Internal;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.DependencyInjection;

namespace kwd.github.Controllers
{
    public class PocoDemoController
    {
        protected PocoDemoController(IActionContextAccessor ctxAccessor)
        {
            //Get Action context direct from accessor
            var ctx = ctxAccessor.ActionContext;

            // Microsoft.AspNetCore.Mvc.Core / ControllerBase.cs
            HttpContext httpContext = ctx.HttpContext;
            HttpRequest request = ctx.HttpContext.Request;
            HttpResponse response = ctx.HttpContext.Response;
            RouteData routeData = ctx.RouteData;
            ModelStateDictionary modelState = ctx.ModelState;
            ControllerContext controllerContext = new ControllerContext(ctx);

            IModelMetadataProvider metadataProvider = 
                httpContext.RequestServices.GetService<IModelMetadataProvider>();

            IModelBinderFactory modelBinderFactory = 
                httpContext.RequestServices.GetRequiredService<IModelBinderFactory>();

            IUrlHelper url = 
                httpContext.RequestServices.GetRequiredService<IUrlHelperFactory>()
                .GetUrlHelper(ctx);

            IObjectModelValidator objectValidator =
                httpContext.RequestServices.GetRequiredService<IObjectModelValidator>();

            ClaimsPrincipal user = httpContext.User;

            //A set of methods for creating IActionResult ...

            //A set of methods for TryUpdateModel ...
            
            //A set of methods for TryValidateModel ...
            //objectValidator.Validate(ctx, null, "", new{});
            
            // Microsoft.AspNetCore.Mvc.ViewFeatures / controller.cs
            ViewDataDictionary viewData = new ViewDataDictionary(metadataProvider, modelState);
            ITempDataDictionary tempData =
                httpContext.RequestServices.GetRequiredService<ITempDataDictionaryFactory>()
                    .GetTempData(httpContext);

            //https://stackoverflow.com/questions/40330391/set-viewbag-property-in-the-constructor-of-a-asp-net-mvc-core-controller
            dynamic viewBag = new DynamicViewData(() => viewData);

            //A set of methods for creating ViewResult ...
            //A set of methods for creating PartialViewResult ...
            //A set of methods for creating ViewComponentResult ...
            //A set of methods for creating JsonResult ...

            //Implementations for IActionFilter
            //Implementation for IAsyncActionFilter

            //Implementation for IDisposable
        }

        public PocoDemoController(IActionContextAccessor ctxAccessor,
            IModelMetadataProvider modelMetaDataProvider,
            IModelBinderFactory modelBinderFactory,
            IUrlHelperFactory urlHelperFactory,
            IObjectModelValidator objectModelValidator,
            ITempDataDictionaryFactory tempDataDictionaryFactory)
        {
            //Get Action context direct from accessor
            var ctx = ctxAccessor.ActionContext;

            //Methods from Controller base
            // Microsoft.AspNetCore.Mvc.Core / ControllerBase.cs
            HttpContext httpContext = ctx.HttpContext;
            HttpRequest request = ctx.HttpContext.Request;
            HttpResponse response = ctx.HttpContext.Response;
            RouteData routeData = ctx.RouteData;
            ModelStateDictionary modelState = ctx.ModelState;
            ControllerContext controllerContext = new ControllerContext(ctx);

            IModelMetadataProvider metadataProvider = modelMetaDataProvider;

            //IModelBinderFactory modelBinderFactory

            IUrlHelper url = urlHelperFactory.GetUrlHelper(ctx);

            IObjectModelValidator objectValidator = objectModelValidator;

            ClaimsPrincipal user = httpContext.User;

            //A set of methods for creating IActionResult ...

            //A set of methods for TryUpdateModel ...

            //A set of methods for TryValidateModel ...
            
            // Microsoft.AspNetCore.Mvc.ViewFeatures / controller.cs
            ViewDataDictionary viewData = new ViewDataDictionary(metadataProvider, modelState);
            ITempDataDictionary tempData = tempDataDictionaryFactory.GetTempData(httpContext);
                
            //https://stackoverflow.com/questions/40330391/set-viewbag-property-in-the-constructor-of-a-asp-net-mvc-core-controller
            dynamic viewBag = new DynamicViewData(() => viewData);

            //A set of methods for creating ViewResult ...
            //A set of methods for creating PartialViewResult ...
            //A set of methods for creating ViewComponentResult ...
            //A set of methods for creating JsonResult ...

            //Implementations for IActionFilter
            //Implementation for IAsyncActionFilter

            //Implementation for IDisposable
        }
    
        public IActionResult Index() { return new ViewResult();}
        
        private async Task<bool> TryUpdateModel<T>(T model, 
            ActionContext ctx, 
            IModelMetadataProvider modelMetaDataProvider,
            IModelBinderFactory modelBinderFactory,
            IObjectModelValidator modelValidator) where T:class
        {
            var valueProvider =await CompositeValueProvider.CreateAsync(new ControllerContext(ctx));
            return await ModelBindingHelper.TryUpdateModelAsync<T>(
                model,
                "",
                ctx,
                modelMetaDataProvider,
                modelBinderFactory,
                valueProvider,
                modelValidator);
        }

        private void TryValidateModel<T>(T model, ActionContext ctx, IObjectModelValidator modelValidator)
            where T:class 
        {
            modelValidator.Validate(ctx, null, "", model);
        }
    }
}