IApplicationBuilder 不包含 UseIdentity 的定义

Question

我正在按照一个示例在AspNet Core 3.0上配置 AspNet Core Identity

这是 StartUp.cs 文件的代码

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Users_WEB_APP.Models;

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

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddDbContext<AppIdentityDbContext>(options => options.UseSqlServer(Configuration["Data:ASPNET_IDENTITY:ConnectionString"]));
            services.AddIdentity<AppUser, IdentityRole>()
                .AddEntityFrameworkStores<AppIdentityDbContext>();
            services.AddMvc(options => options.EnableEndpointRouting = false);
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseStatusCodePages();
            app.UseDeveloperExceptionPage();
            app.UseStaticFiles();
            app.UseIdentity();
            app.UseMvcWithDefaultRoute();
        }
    }
}

但是在app.UseIdentity(); 行我收到错误

“IApplicationBuilder”不包含“UseIdentity”的定义，并且找不到接受“IApplicationBuilder”类型的第一个参数的可访问扩展方法“UseIdentity”（您是在搞乱 using 指令还是程序集引用？）

我做错了什么？

Answer 1

文档说从 ASP.NET Core 2.2 开始， UseIdentity现在已经过时，应该使用UseAuthentication代替

此方法已过时，将在未来版本中删除。 推荐的替代方法是UseAuthentication(IApplicationBuilder)

https://docs.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.builder.builderextensions.useidentity?view=aspnetcore-2.2

Answer 2

用

app.UseAuthentication();

这个对我有用