No service for type 'Microsoft.AspNetCore.Mvc.ViewFeatures.ITempDataDictionaryFactory' has been registered

If you're using 2.x then use services.AddMvcCore().AddRazorViewEngine(); in your ConfigureServices

Also remember to add .AddAuthorization() if you're using Authorize attribute, otherwise it won't work.

Update: for 3.1 onwards use services.AddControllersWithViews();

I know this is an old post but it was my top Google result when running into this after migrating an MVC project to .NET Core 3.0. Making my Startup.cs look like this fixed it for me:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddControllersWithViews();
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseRouting();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });
    }
}

In .NET Core 3.1, I had to add the following:

services.AddRazorPages();

in ConfigureServices()

And the below in Configure() in Startup.cs

app.UseEndpoints(endpoints =>
{
     endpoints.MapRazorPages();
}

In 2022 with .NET 6.0,

Add this line to Program.cs

var builder = WebApplication.CreateBuilder(args); //After this line...
builder.Services.AddRazorPages(); //<--This line

For Net Core (NET 6.0 or above using VS 2022) this error may happen when trying to consume views. To avoid this issue don't forget when configuring Program.cs to use AddControllersWithViews instead of AddControllers

An Example of the fix:

using Microsoft.EntityFrameworkCore;
using WebApp.Net.Core.Api.EF.Core.Angular.Models;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
var configurationService =  builder.Services.BuildServiceProvider().GetService<IConfiguration>();
builder.Services.AddDbContext<AppDbContext1>(options => options.UseSqlServer(configurationService.GetConnectionString("appSetttingsCon1")));
//builder.Services.AddControllers();//this will trigger the error when consuming views
builder.Services.AddControllersWithViews();//this fixes the issue

For .NET Core 2.0, in ConfigureServices, use :

services.AddNodeServices();

Solution: Use services.AddMvcCore(options => options.EnableEndpointRouting = false).AddRazorViewEngine(); in Startup.cs and it will work.

This code is tested for asp.net core 3.1 (MVC)

Right now i has same problem, I was using AddMcvCore like you. I found error self descriptive, as an assumption I added AddControllersWithViews service to ConfigureServices function and it fixed problem for me. (I still use AddMvcCore as well.)

    public void ConfigureServices(IServiceCollection services)
    {
        //...
        services.AddControllers();
        services.AddControllersWithViews();
        services.AddMvcCore();
        //...
    }    

Just add following code and it should work:

   public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvcCore()
                    .AddViews();

        }

For those that get this issue during .NetCore 1.X -> 2.0 upgrade, update both your Program.cs and Startup.cs

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

    public static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .Build();
}

public class Startup
{
// The appsettings.json settings that get passed in as Configuration depends on 
// project properties->Debug-->Enviroment Variables-->ASPNETCORE_ENVIRONMENT
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddDbContext<ApplicationDbContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));

        services.AddIdentity<ApplicationUser, IdentityRole>()
            .AddEntityFrameworkStores<ApplicationDbContext>()
            .AddDefaultTokenProviders();

        services.AddTransient<IEmailSender, EmailSender>();

        services.AddMvc();
    }

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
    // no change to this method leave yours how it is
    }
}

This one works for my case :

services.AddMvcCore()
.AddApiExplorer();

You use this in startup.cs

services.AddSingleton<PartialViewResultExecutor>();

I'm currently using VS 2022 and .NET 6.

The following line was giving me the error as described, and I incorrectly tried removing the entire line, but that did not work. The offending line:

services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_3_0);

It was as simple as removing the SetCompatibilityVersion part:

services.AddMvc()