hello-world-with-IHostingEnvironment-Configure-Services


using Microsoft.AspNetCore.Hosting; //IWebHostBuilder
using Microsoft.AspNetCore.Builder; //IApplicationBuilder
using Microsoft.AspNetCore.Http; //WriteAsync
using Microsoft.AspNetCore; //webHost
using Microsoft.Extensions.Logging; //ILoggerFactory
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;

namespace WebApplication1
{
    public class SimpleOption
    {
        public string ContentPath { get; set; }
    }

    public class Startup
    {
        IHostingEnvironment _env;
        public Startup(IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are two services available at constructor
            _env = env;
        }

        public void ConfigureServices(IServiceCollection services)
        {
            //This is the only service available at ConfigureServices
            services.Configure<SimpleOption>(option =>
            {
                option.ContentPath = _env.ContentRootPath;
            });
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env,  ILoggerFactory logger)
        {
            app.Run(async context =>
            {
                context.Response.ContentType = "text/html";
                var simpleOption = context.RequestServices.GetService<IOptions<SimpleOption>>();

                await context.Response.WriteAsync($"{simpleOption.Value.ContentPath}");
            });            
        }
    }

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

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
                .UseStartup<Startup>()
                .UseEnvironment("Development");
    }
}

using Microsoft.AspNetCore.Hosting; //IWebHostBuilder

using Microsoft.AspNetCore.Builder; //IApplicationBuilder

using Microsoft.AspNetCore.Http; //WriteAsync

using Microsoft.AspNetCore; //webHost

using Microsoft.Extensions.Logging; //ILoggerFactory

using Microsoft.Extensions.DependencyInjection;

using Microsoft.Extensions.Options;

namespace WebApplication1

{

public class SimpleOption

{

public string ContentPath { get; set; }

}

public class Startup

{

IHostingEnvironment _env;

public Startup(IHostingEnvironment env, ILoggerFactory logger)

{

//These are two services available at constructor

_env = env;

}

public void ConfigureServices(IServiceCollection services)

{

//This is the only service available at ConfigureServices

services.Configure<SimpleOption>(option =>

{

option.ContentPath = _env.ContentRootPath;

});

}

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger)

{

app.Run(async context =>

{

context.Response.ContentType = "text/html";

var simpleOption = context.RequestServices.GetService<IOptions<SimpleOption>>();

await context.Response.WriteAsync($"{simpleOption.Value.ContentPath}");

});

}

public class Program

{

public static void Main(string[] args)

{

CreateWebHostBuilder(args).Build().Run();

}

public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>

WebHost.CreateDefaultBuilder(args)

.UseStartup<Startup>()

.UseEnvironment("Development");

}

결과 : D:\Sample\MVC\WebApplication2\WebApplication1