ASP.NET Core-获取所有注入(DI)服务

Startup.cs

    public class Startup
    {
        private IServiceCollection _services;
        // This method gets called by the runtime. Use this method to add services to the container.
        // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
            _services = services;
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole();
            var _logger = loggerFactory.CreateLogger("Services");
            _logger.LogInformation($"Total Services Registered: {_services.Count}");
            foreach (var service in _services)
            {
                _logger.LogInformation($"Service: {service.ServiceType.FullName}\n      Lifetime: {service.Lifetime}\n      Instance: {service.ImplementationType?.FullName}");
            }

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.Run(async (context) =>
            {
                await context.Response.WriteAsync("Hello World!");
            });
        }
    }

Startup2.cs

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole();
            var _logger = loggerFactory.CreateLogger("Services");
            _logger.LogInformation($"Total Services Registered: {_services.Count}");
            foreach (var service in _services)
            {
                _logger.LogInformation($"Service: {service.ServiceType.FullName}\n      Lifetime: {service.Lifetime}\n      Instance: {service.ImplementationType?.FullName}");
            }

            if (env.IsDevelopment())
            {
                app.Map("/allservices", builder => builder.Run(async context =>
                {
                    context.Response.ContentType = "text/html; charset=utf-8";
                    await context.Response.WriteAsync($"<h1>所有服务{_services.Count}个</h1><table><thead><tr><th>类型</th><th>生命周期</th><th>Instance</th></tr></thead><tbody>");
                    foreach (var svc in _services)
                    {
                        await context.Response.WriteAsync("<tr>");
                        await context.Response.WriteAsync($"<td>{svc.ServiceType.FullName}</td>");
                        await context.Response.WriteAsync($"<td>{svc.Lifetime}</td>");
                        await context.Response.WriteAsync($"<td>{svc.ImplementationType?.FullName}</td>");
                        await context.Response.WriteAsync("</tr>");
                    }
                    await context.Response.WriteAsync("</tbody></table>");
                }));
                app.UseDeveloperExceptionPage();
            }

            app.Run(async (context) =>
            {
                await context.Response.WriteAsync("Hello World!");
            });
        }