asp.net core-11.WebHost的配置

1.添加空的web网站 ，在目录下添加settings.json文件，在控制台上输出json的信息

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

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
            .ConfigureAppConfiguration(c=> {
                c.AddJsonFile("settings.json");
                c.AddCommandLine(args);
            })
                .UseStartup<Startup>()
                .Build();
    }

　　在Startup文件里面添加引用using Microsoft.Extensions.Configuration;

 public class Startup
    {
        // 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 https://go.microsoft.com/fwlink/?LinkID=398940
        public void ConfigureServices(IServiceCollection services)
        {
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env,IConfiguration configuration)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.Run(async (context) =>
            {
                await context.Response.WriteAsync("Hello World!");
                await context.Response.WriteAsync(configuration["ConnectionStrings:DefaultConnection"]);
            });
        }
    }

　　然后我们可以去修改url访问地址：http://localhost:5002

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

        public static IWebHost BuildWebHost(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
            .ConfigureAppConfiguration(c=> {
                c.AddJsonFile("settings.json");
                c.AddCommandLine(args);
            })
            .UseUrls("http://localhost:5002")
                .UseStartup<Startup>()
                .Build();
    }

　　

运行

打开浏览器输入http://localhost:5002