C# (Csharp) 프로그래밍

middleware-2


using Microsoft.AspNetCore.Hosting; //IWebHostBuilder
using Microsoft.AspNetCore.Builder; //IApplicationBuilder
using Microsoft.AspNetCore.Http; //WriteAsync
using Microsoft.AspNetCore; //webHost
using System.IO;
using System.Threading.Tasks;


namespace WebApplication1
{
    public class Startup
    {
        public void Configure(IApplicationBuilder app)
        {
            //We use it the type so it is clear. We will use the shortened version from now on.
            //app.Use(next => context => FilterAsync(context, next));
            app.Use((RequestDelegate next) =>
            {
                return (HttpContext context) => BufferAsync(context, next);
            });

            app.Run(async context =>
            {
                context.Response.Headers.Add("content-type", "text/html");
                await context.Response.WriteAsync("<h1>This sample uses buffering</h1>");
                await context.Response.WriteAsync("<p>This allows all your Middlewares to write to Response.</p>");
            });
        }

        public async Task BufferAsync(HttpContext context, RequestDelegate next)
        {
            var body = context.Response.Body;
            var buffer = new MemoryStream();
            context.Response.Body = buffer;

            try
            {
                await context.Response.WriteAsync("<html><body>");
                await next(context);
                await context.Response.WriteAsync("</body></html>");

                buffer.Position = 0;
                await buffer.CopyToAsync(body);
            }
            finally
            {
                context.Response.Body = body;
            }
        }
    }

    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 System.IO;

using System.Threading.Tasks;

namespace WebApplication1

{

public class Startup

{

public void Configure(IApplicationBuilder app)

{

//We use it the type so it is clear. We will use the shortened version from now on.

//app.Use(next => context => FilterAsync(context, next));

app.Use((RequestDelegate next) =>

{

return (HttpContext context) => BufferAsync(context, next);

});

app.Run(async context =>

{

context.Response.Headers.Add("content-type", "text/html");

await context.Response.WriteAsync("<h1>This sample uses buffering</h1>");

await context.Response.WriteAsync("<p>This allows all your Middlewares to write to Response.</p>");

});

}

public async Task BufferAsync(HttpContext context, RequestDelegate next)

{

var body = context.Response.Body;

var buffer = new MemoryStream();

context.Response.Body = buffer;

try

{

await context.Response.WriteAsync("<html><body>");

await next(context);

await context.Response.WriteAsync("</body></html>");

buffer.Position = 0;

await buffer.CopyToAsync(body);

}

finally

{

context.Response.Body = body;

}

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 : This sample uses buffering This allows all your Middlewares to write to Response.

middleware-1


using Microsoft.AspNetCore.Hosting; //IWebHostBuilder
using Microsoft.AspNetCore.Builder; //IApplicationBuilder
using Microsoft.AspNetCore.Http; //WriteAsync
using Microsoft.AspNetCore; //webHost
using Microsoft.AspNetCore;
using System.Threading.Tasks;

namespace WebApplication1
{
    public class Startup
    {
        public void Configure(IApplicationBuilder app)
        {
            //The order of these things are important. 
            //Only one Middleware should write to the Response. 
            //Do not write to Response before next.Invoke()
            app.Use(async (context, next) =>
            {
                context.Items["Greeting"] = "Hello World";
                await next.Invoke();
                await context.Response.WriteAsync($"{context.Items["Greeting"]}\n");
                await context.Response.WriteAsync($"{context.Items["Goodbye"]}\n");
            });

            app.Use((context, next) =>
            {
                context.Items["Goodbye"] = "Goodbye for now";
                return Task.CompletedTask;
            });
        }
    }

    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.AspNetCore;

using System.Threading.Tasks;

namespace WebApplication1

{

public class Startup

{

public void Configure(IApplicationBuilder app)

{

//The order of these things are important.

//Only one Middleware should write to the Response.

//Do not write to Response before next.Invoke()

app.Use(async (context, next) =>

{

context.Items["Greeting"] = "Hello World";

await next.Invoke();

await context.Response.WriteAsync($"{context.Items["Greeting"]}\n");

await context.Response.WriteAsync($"{context.Items["Goodbye"]}\n");

});

app.Use((context, next) =>

{

context.Items["Goodbye"] = "Goodbye for now";

return Task.CompletedTask;

});

}

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 : Hello World Goodbye for now

localization-4


pNetCore.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; // IServiceCollection
using System.Globalization;
using System.Collections.Generic;
using Microsoft.AspNetCore.Localization;
using Microsoft.Extensions.Localization;
using System;

namespace WebApplication1
{
    public class Startup
    {
        public Startup(IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are two services available at constructor
        }

        public void ConfigureServices(IServiceCollection services)
        {   
            services.AddLocalization(optipns => optipns.ResourcesPath = "resources"); // resources path 
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger, IStringLocalizerFactory stringLocalizerFactory)
        {
            var local = stringLocalizerFactory.Create("Common", typeof(Program).Assembly.FullName);

            var supportedCultures = new List<CultureInfo>
            {
                new CultureInfo("fr-FR"),
                new CultureInfo("en-US")
            };

            var options = new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("fr-FR"),
                SupportedCultures = supportedCultures,
                SupportedUICultures = supportedCultures
            };

            app.UseRequestLocalization(options);
            
            app.Run(async context =>
            {
                var languageSwitch = context.Request.Query["lang"];

                try
                {
                    if (languageSwitch == "fr")
                    {
                        var val = CookieRequestCultureProvider.MakeCookieValue(new RequestCulture("fr-FR"));
                        context.Response.Cookies.Append(CookieRequestCultureProvider.DefaultCookieName, val);
                        context.Response.Redirect("/");
                        return;
                    }
                    else if (languageSwitch == "en")
                    {
                        var val = CookieRequestCultureProvider.MakeCookieValue(new RequestCulture("en-US"));
                        context.Response.Cookies.Append(CookieRequestCultureProvider.DefaultCookieName, val);
                        context.Response.Redirect("/");
                        return;
                    }
                }
                catch (Exception ex)
                {
                    await context.Response.WriteAsync($"error {ex.Message}");
                }

                await context.Response.WriteAsync($"<h1>CookieRequestCultureProvider</h1><p>We are using a cookie named \"{CookieRequestCultureProvider.DefaultCookieName}\" to switch the request culture.</p>");

                var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;

                await context.Response.WriteAsync($@"
                Click <a href=""/?lang=fr"">here</a> for French cookie and <a href=""/?lang=en"">here</a> for English cookie.<br/><br/>
                
                Request Culture: {requestCulture.Culture} <br/> 
                Localized strings: {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}
                ");
            });
        }
    }
    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");
    }
}

pNetCore.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; // IServiceCollection

using System.Globalization;

using System.Collections.Generic;

using Microsoft.AspNetCore.Localization;

using Microsoft.Extensions.Localization;

using System;

namespace WebApplication1

{

public class Startup

{

public Startup(IHostingEnvironment env, ILoggerFactory logger)

{

//These are two services available at constructor

}

public void ConfigureServices(IServiceCollection services)

{

services.AddLocalization(optipns => optipns.ResourcesPath = "resources"); // resources path

}

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

{

var local = stringLocalizerFactory.Create("Common", typeof(Program).Assembly.FullName);

var supportedCultures = new List<CultureInfo>

{

new CultureInfo("fr-FR"),

new CultureInfo("en-US")

};

var options = new RequestLocalizationOptions

{

DefaultRequestCulture = new RequestCulture("fr-FR"),

SupportedCultures = supportedCultures,

SupportedUICultures = supportedCultures

};

app.UseRequestLocalization(options);

app.Run(async context =>

{

var languageSwitch = context.Request.Query["lang"];

try

{

if (languageSwitch == "fr")

{

var val = CookieRequestCultureProvider.MakeCookieValue(new RequestCulture("fr-FR"));

context.Response.Cookies.Append(CookieRequestCultureProvider.DefaultCookieName, val);

context.Response.Redirect("/");

return;

}

else if (languageSwitch == "en")

{

var val = CookieRequestCultureProvider.MakeCookieValue(new RequestCulture("en-US"));

context.Response.Cookies.Append(CookieRequestCultureProvider.DefaultCookieName, val);

context.Response.Redirect("/");

return;

}

catch (Exception ex)

{

await context.Response.WriteAsync($"error {ex.Message}");

}

await context.Response.WriteAsync($"<h1>CookieRequestCultureProvider</h1><p>We are using a cookie named \"{CookieRequestCultureProvider.DefaultCookieName}\" to switch the request culture.</p>");

var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;

await context.Response.WriteAsync($@"

Click <a href=""/?lang=fr"">here</a> for French cookie and <a href=""/?lang=en"">here</a> for English cookie.<br/><br/>

Request Culture: {requestCulture.Culture} <br/>

Localized strings: {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}

");

});

}

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 : CookieRequestCultureProvider We are using a cookie named “.AspNetCore.Culture” to switch the request culture. Click here for French cookie and here for English cookie. Request Culture: fr-FR Localized strings: Bonjour Au Revoir Oui Non

localization-2


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; // IServiceCollection
using System.Globalization;
using System.Collections.Generic;
using Microsoft.AspNetCore.Localization;
using Microsoft.Extensions.Localization;

namespace WebApplication1
{
    public class Startup
    {
        public Startup(IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are two services available at constructor
        }

        public void ConfigureServices(IServiceCollection services)
        {   
            services.AddLocalization(optipns => optipns.ResourcesPath = "resources"); // resources path 
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger, IStringLocalizerFactory stringLocalizerFactory)
        {
            var local = stringLocalizerFactory.Create("Common", typeof(Program).Assembly.FullName);

            var supportedCultures = new List<CultureInfo>
            {
                new CultureInfo("fr-FR"),
                new CultureInfo("en-US")
            };

            var options = new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("fr-FR"),
                SupportedCultures = supportedCultures,
                SupportedUICultures = supportedCultures
            };

            app.UseRequestLocalization(options);
            
            app.Run(async context =>
            {
                await context.Response.WriteAsync("<h1>QueryStringRequestCultureProvider</h1><p>We are using query string to switch the request culture.</p>");

                var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;
                
                //if (requestCulture.Culture.TwoLetterISOLanguageName != "fr")
                //    await context.Response.WriteAsync($"<a href=\"/?culture=fr-FR&ui-culture=fr-FR\">Switch to French</a><br/>");
                //else if (requestCulture.Culture.TwoLetterISOLanguageName != "en")
                //    await context.Response.WriteAsync($"<a href=\"/?culture=en-US&ui-culture=en-US\">Switch to English</a><br/>");

                //await context.Response.WriteAsync($@"
                //    Request Culture: {requestCulture.Culture} <br/> 
                //    Localized strings: {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}
                //    ");

                await context.Response.WriteAsync($@"
                <a href=""/?culture=fr-FR&ui-culture=fr-FR"">Culture FR - UI Culture GB</a><br/>
                <a href=""/?culture=en-US&ui-culture=en-US"">Culture US - UI Culture US</a><br/>
                <br/>
                Request Culture: {requestCulture.Culture} <br/>
                Today's Date (Culture): {DateTime.Now.ToString()}<br/><br/>
                Request UI Culture: {requestCulture.UICulture}<br/> 
                Localized strings (UI Culture): {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}
                ");
            });
        }
    }
    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; // IServiceCollection

using System.Globalization;

using System.Collections.Generic;

using Microsoft.AspNetCore.Localization;

using Microsoft.Extensions.Localization;

namespace WebApplication1

{

public class Startup

{

public Startup(IHostingEnvironment env, ILoggerFactory logger)

{

//These are two services available at constructor

}

public void ConfigureServices(IServiceCollection services)

{

services.AddLocalization(optipns => optipns.ResourcesPath = "resources"); // resources path

}

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

{

var local = stringLocalizerFactory.Create("Common", typeof(Program).Assembly.FullName);

var supportedCultures = new List<CultureInfo>

{

new CultureInfo("fr-FR"),

new CultureInfo("en-US")

};

var options = new RequestLocalizationOptions

{

DefaultRequestCulture = new RequestCulture("fr-FR"),

SupportedCultures = supportedCultures,

SupportedUICultures = supportedCultures

};

app.UseRequestLocalization(options);

app.Run(async context =>

{

await context.Response.WriteAsync("<h1>QueryStringRequestCultureProvider</h1><p>We are using query string to switch the request culture.</p>");

var requestCulture = context.Features.Get<IRequestCultureFeature>().RequestCulture;

//if (requestCulture.Culture.TwoLetterISOLanguageName != "fr")

// await context.Response.WriteAsync($"<a href=\"/?culture=fr-FR&ui-culture=fr-FR\">Switch to French</a><br/>");

//else if (requestCulture.Culture.TwoLetterISOLanguageName != "en")

// await context.Response.WriteAsync($"<a href=\"/?culture=en-US&ui-culture=en-US\">Switch to English</a><br/>");

//await context.Response.WriteAsync($@"

// Request Culture: {requestCulture.Culture} <br/>

// Localized strings: {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}

// ");

await context.Response.WriteAsync($@"

<a href=""/?culture=fr-FR&ui-culture=fr-FR"">Culture FR - UI Culture GB</a><br/>

<a href=""/?culture=en-US&ui-culture=en-US"">Culture US - UI Culture US</a><br/>

<br/>

Request Culture: {requestCulture.Culture} <br/>

Today's Date (Culture): {DateTime.Now.ToString()}<br/><br/>

Request UI Culture: {requestCulture.UICulture}<br/>

Localized strings (UI Culture): {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}

");

});

}

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");

}

:: resources :: Common.fr-FR.resx Goodbye Au Revoir Hello Bonjour No Non Yes Oui :: Goodbye Howdy :: Common.en-US.resx Hello So long No Yah Yes Nope 결과 : QueryStringRequestCultureProvider We are using query string to switch the request culture. Culture FR – UI Culture GB Culture US – UI Culture US Request Culture: fr-FR Today’s… Read More »

localization


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; // IServiceCollection
using System.Globalization;
using System.Collections.Generic;
using Microsoft.AspNetCore.Localization;
using Microsoft.Extensions.Localization;

namespace WebApplication1
{
    public class Startup
    {
        public Startup(IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are two services available at constructor
        }

        public void ConfigureServices(IServiceCollection services)
        {   
            services.AddLocalization(optipns => optipns.ResourcesPath = "resources"); // resources path 
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger, IStringLocalizerFactory stringLocalizerFactory)
        {
            var local = stringLocalizerFactory.Create("Common", typeof(Program).Assembly.FullName);

            var supportedCultures = new List<CultureInfo>
            {
                new CultureInfo("fr-FR")
            };

            var options = new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("fr-FR"),
                SupportedCultures = supportedCultures,
                SupportedUICultures = supportedCultures
            };

            app.UseRequestLocalization(options);
            
            app.Run(async context =>
            {
                var requestCulture = context.Features.Get<IRequestCultureFeature>();
                await context.Response.WriteAsync($"{requestCulture.RequestCulture.Culture} - {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}");
            });
        }
    }
    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; // IServiceCollection

using System.Globalization;

using System.Collections.Generic;

using Microsoft.AspNetCore.Localization;

using Microsoft.Extensions.Localization;

namespace WebApplication1

{

public class Startup

{

public Startup(IHostingEnvironment env, ILoggerFactory logger)

{

//These are two services available at constructor

}

public void ConfigureServices(IServiceCollection services)

{

services.AddLocalization(optipns => optipns.ResourcesPath = "resources"); // resources path

}

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

{

var local = stringLocalizerFactory.Create("Common", typeof(Program).Assembly.FullName);

var supportedCultures = new List<CultureInfo>

{

new CultureInfo("fr-FR")

};

var options = new RequestLocalizationOptions

{

DefaultRequestCulture = new RequestCulture("fr-FR"),

SupportedCultures = supportedCultures,

SupportedUICultures = supportedCultures

};

app.UseRequestLocalization(options);

app.Run(async context =>

{

var requestCulture = context.Features.Get<IRequestCultureFeature>();

await context.Response.WriteAsync($"{requestCulture.RequestCulture.Culture} - {local["Hello"]} {local["Goodbye"]} {local["Yes"]} {local["No"]}");

});

}

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");

}

:: resources :: Goodbye Au Revoir Hello Bonjour No Non Yes Oui 결과 : fr-FR – Bonjour Au Revoir Oui Non

generic-host

컴파일 오류


using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using System.Threading.Tasks;
using System.Threading;
using Microsoft.Extensions.Hosting;
using System;

namespace ConsoleApp2
{
    public class HelloWorldService : IHostedService
    {
        public Task StartAsync(CancellationToken cancellationToken)
        {
            Console.WriteLine("Hello world");
            return Task.CompletedTask;
        }

        public Task StopAsync(CancellationToken cancellationToken)
        {
            Console.WriteLine("Goodbye");
            return Task.CompletedTask;
        }
    }

    public class Program
    {
        public static async Task Main(string[] args)
        {
            var host = new HostBuilder()
                .ConfigureServices((hostContext, services) =>
                {
                    services.AddHostedService<HelloWorldService>();
                })
                .Build();

            await host.RunAsync();
        }
    }
}

using Microsoft.AspNetCore.Hosting;

using Microsoft.Extensions.DependencyInjection;

using System.Threading.Tasks;

using System.Threading;

using Microsoft.Extensions.Hosting;

using System;

namespace ConsoleApp2

{

public class HelloWorldService : IHostedService

{

public Task StartAsync(CancellationToken cancellationToken)

{

Console.WriteLine("Hello world");

return Task.CompletedTask;

}

public Task StopAsync(CancellationToken cancellationToken)

{

Console.WriteLine("Goodbye");

return Task.CompletedTask;

}

public class Program

{

public static async Task Main(string[] args)

{

var host = new HostBuilder()

.ConfigureServices((hostContext, services) =>

{

services.AddHostedService<HelloWorldService>();

})

.Build();

await host.RunAsync();

}

hello-world-startup-multiple-configure-environment-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; // IServiceCollection

namespace WebApplication1
{
    public class Greet
    {
        string _greeting;

        public Greet(string greeting)
        {
            _greeting = greeting;
        }

        public string Say() => _greeting;
    }

    public class Startup
    {
        public void ConfigureProductionServices(IServiceCollection services)
        {
            services.AddSingleton(new Greet("Hello Production"));
        }

        public void ConfigureDevelopmentServices(IServiceCollection services)
        {
            services.AddSingleton(new Greet("Hello Development"));
        }

        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are the three default services available at Configure

            app.Run(context =>
            {
                var greeter = context.RequestServices.GetService<Greet>();
                if (greeter == null)
                    return context.Response.WriteAsync($"Greeter is null");
                else
                    return context.Response.WriteAsync($"{greeter.Say()}");
            });
        }
    }

    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"); //You can change this to "Production" to use StartupProduction
    }
}

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; // IServiceCollection

namespace WebApplication1

{

public class Greet

{

string _greeting;

public Greet(string greeting)

{

_greeting = greeting;

}

public string Say() => _greeting;

}

public class Startup

{

public void ConfigureProductionServices(IServiceCollection services)

{

services.AddSingleton(new Greet("Hello Production"));

}

public void ConfigureDevelopmentServices(IServiceCollection services)

{

services.AddSingleton(new Greet("Hello Development"));

}

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

{

//These are the three default services available at Configure

app.Run(context =>

{

var greeter = context.RequestServices.GetService<Greet>();

if (greeter == null)

return context.Response.WriteAsync($"Greeter is null");

else

return context.Response.WriteAsync($"{greeter.Say()}");

});

}

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"); //You can change this to "Production" to use StartupProduction

}

결과: Hello Development

hello-world-startup-multiple-configure-environment


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; // IServiceCollection

namespace WebApplication1
{
    public class Startup
    {
        public void ConfigureProduction(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are the three default services available at Configure

            app.Run(context =>
            {
                return context.Response.WriteAsync("Hello world Production");
            });
        }

        public void ConfigureDevelopment(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are the three default services available at Configure

            app.Run(context =>
            {
                return context.Response.WriteAsync("Hello world Development");
            });
        }
    }

    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"); //You can change this to "Production" to use StartupProduction
    }
}

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; // IServiceCollection

namespace WebApplication1

{

public class Startup

{

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

{

//These are the three default services available at Configure

app.Run(context =>

{

return context.Response.WriteAsync("Hello world Production");

});

}

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

{

//These are the three default services available at Configure

app.Run(context =>

{

return context.Response.WriteAsync("Hello world Development");

});

}

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"); //You can change this to "Production" to use StartupProduction

}

결과 : Hello world Development

hello-world-startup-istartupfilter


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; // IServiceCollection
using System.Threading.Tasks;
using System; //IStartupFilter

namespace WebApplication1
{

    public class GreetingStartupFilter : IStartupFilter
    {
        public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)
        {
            return builder =>
            {
                builder.UseMiddleware<GreetingMiddleware>();
                builder.UseMiddleware<HelloWorldMiddleware>();
                next(builder);
            };
        }
    }

    public class HelloWorldMiddleware
    {
        public HelloWorldMiddleware(RequestDelegate next)
        {

        }

        public async Task Invoke(HttpContext context)
        {
            await context.Response.WriteAsync($"{context.Items["Greetings"]}");
        }
    }

    public class GreetingMiddleware
    {
        RequestDelegate _next;
        public GreetingMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        public async Task Invoke(HttpContext context)
        {
            context.Items["Greetings"] = "Hello world from GreetingMiddleware";
            await _next(context);
        }
    }


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

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddTransient<IStartupFilter, GreetingStartupFilter>();
        }


        public void Configure(IApplicationBuilder app)
        {
            
        }
    }

    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"); //You can change this to "Production" to use StartupProduction
    }
}

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; // IServiceCollection

using System.Threading.Tasks;

using System; //IStartupFilter

namespace WebApplication1

{

public class GreetingStartupFilter : IStartupFilter

{

public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)

{

return builder =>

{

builder.UseMiddleware<GreetingMiddleware>();

builder.UseMiddleware<HelloWorldMiddleware>();

next(builder);

};

}

public class HelloWorldMiddleware

{

public HelloWorldMiddleware(RequestDelegate next)

{

}

public async Task Invoke(HttpContext context)

{

await context.Response.WriteAsync($"{context.Items["Greetings"]}");

}

public class GreetingMiddleware

{

RequestDelegate _next;

public GreetingMiddleware(RequestDelegate next)

{

_next = next;

}

public async Task Invoke(HttpContext context)

{

context.Items["Greetings"] = "Hello world from GreetingMiddleware";

await _next(context);

}

public class Startup

{

public Startup(IHostingEnvironment env, ILoggerFactory logger)

{

//These are two services available at constructor

}

public void ConfigureServices(IServiceCollection services)

{

services.AddTransient<IStartupFilter, GreetingStartupFilter>();

}

public void Configure(IApplicationBuilder app)

{

}

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"); //You can change this to "Production" to use StartupProduction

}

결과 : Hello world from GreetingMiddleware

hello-world-startup-istartup


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; // IServiceCollection

namespace WebApplication1
{
    public class Startup
    {
        public Startup(IHostingEnvironment env, ILoggerFactory logger)
        {
            //These are two services available at constructor
        }

        public void Configure(IApplicationBuilder app)
        {
            //With normal startup class these two variables are available from the parameters of Configure method
            var env = (IHostingEnvironment)app.ApplicationServices.GetService(typeof(IHostingEnvironment));
            var logger = (ILoggerFactory)app.ApplicationServices.GetService(typeof(ILoggerFactory));
            app.Run(async context =>
            {
                await context.Response.WriteAsync($"{env.EnvironmentName}");
            });
        }
    }

    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"); //You can change this to "Production" to use StartupProduction
    }
}

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; // IServiceCollection

namespace WebApplication1

{

public class Startup

{

public Startup(IHostingEnvironment env, ILoggerFactory logger)

{

//These are two services available at constructor

}

public void Configure(IApplicationBuilder app)

{

//With normal startup class these two variables are available from the parameters of Configure method

var env = (IHostingEnvironment)app.ApplicationServices.GetService(typeof(IHostingEnvironment));

var logger = (ILoggerFactory)app.ApplicationServices.GetService(typeof(ILoggerFactory));

app.Run(async context =>

{

await context.Response.WriteAsync($"{env.EnvironmentName}");

});

}

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"); //You can change this to "Production" to use StartupProduction

}

결과 :Development