ASP.NET CORE 没有 app.UseEndpoints() 方法

Question

Just learning ASP.NET Core now and in some guides I see app.UseEndpoints() method.

But when I created my ASP NET CORE Project I've only seen app.Run in StartUp.cs

1. So Need I install some utilities for this or UseEndPoints was removed?
2. How Can I realize this method app.UseEndpoints(endpoints => { endpoints.MapHub<ChatHub>("/chat"); });

Answer 1

If you are using Net Core 2.1, you have to configure it that way:

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using SignalRChat.Hubs;

namespace SignalRChat
{


public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }


    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
        services.AddSignalR();
    }


    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {

        app.UseSignalR(routes =>
        {
            routes.MapHub<ChatHub>("/chat");
        });
        app.UseMvc();
    }
}

}

Only afrer version 3.0 you can use app.UseEndpoints

app.UseEndpoints(endpoints =>
        {              
            endpoints.MapHub<ChatHub>("/chat");
        });

See docs:

ASP.NET Core 2.1

ASP.NET Core 3.0 +

Answer 2

If you're using .NET Core 3.1 version, then you need to make sure you've got:

using Microsoft.AspNetCore.Builder;

In the file, and you'll need to be referencing (directly or indirectly) the Microsoft.AspNetCore.Routing assembly.

Answer 3

If you are learning, you are better off starting with current .NET Core version, which is 3.1. 2.1 didn't have endpoint routing at all, work towards endpoint routing started in 2.2 but I think it was mostly behind the scenes, not exposed to consumer code as UseEndpoints() . In 3.1, Sean's answer applies - you usually get the correct NuGet include just by specifying <Project Sdk="Microsoft.NET.Sdk.Web"> in your csproj.