使用AddMvcCore（）而不是AddMvc（）的ASP.NET Core 2.0 Razor页面

Question

I'm not a big fan of using the pre-bundled AddMvc() and prefer to use the AddMvcCore() instead.

Having said that, I was wondering how to go about using the new (as of 2.0) AddRazorPages() with AddMvcCore() .

For example, if we do a "bare-bones" configuration of middleware to only use AddRazorPages() which is found from the official repository

// loaded the NuGet package Microsoft.AspNetCore.Mvc.RazorPages
public void ConfigureServices(IServiceCollection services)
{
    services.AddMvcCore()
        .AddRazorPages();
}

After I created a foo.cshtml page and placed it into the .\\Pages\\ directory, it is returning a 404 (Page not found) when I navigate to the URL \\Foo .

.\\Pages\\Foo.cshtml

@page
@model IndexModel
@using Microsoft.AspNetCore.Mvc.RazorPages

@functions {
    public class IndexModel : PageModel
    {
        public string Message { get; private set; } = "In page model: ";

        public void OnGet()
        {
            Message += $" Server seconds  { DateTime.Now.Second.ToString() }";
        }
    }
}

<h2>Hello World</h2>
<p>
    @Model.Message
</p>

The sample page above is taken from the Microsoft Documents: Introduction to Razor Pages in ASP.NET Core

Has anyone figured this out, or know what is missing? I'm thinking there is an issue with the routing.

Answer 1

It turns out there were two issues.

(1) I needed to run the MVC middleware (duh!)

public void Configure(IApplicationBuilder app, ... )
{
    app.UseMvc();
}

(2) Then I got an exception thrown, which forced me to have to include .AddAuthorization()

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvcCore()
        .AddAuthorization()
        .AddRazorPages();
}

Here it is super-simplified into a simple Console app:

//using System.IO;
//using Microsoft.AspNetCore.Builder;
//using Microsoft.AspNetCore.Hosting;
//using Microsoft.Extensions.DependencyInjection;

public static void Main(string[] args)
{
    IWebHost host = new WebHostBuilder()
        .UseKestrel()
        .UseContentRoot(Directory.GetCurrentDirectory())
        .ConfigureServices(services =>
        {
            services.AddMvcCore()
                .AddAuthorization()
                .AddRazorPages();
        })
        .Configure(app =>
        {
            //app.UseExceptionHandler("/error");
            app.UseStaticFiles();
            app.UseMvc();
        })
        .Build();

    host.Run();
}

Answer 2

Taking a look at the source code for AddMvc we can see that it calls AddMvcCore internally and then proceeds to add additional items. So if I were you I would start adding these items in until you get Razor Pages to work, probably focusing on the Razor parts. For example:

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