在IIS中托管时，我的MVC Core应用程序的Program类应该是什么样？

Question

At the moment, the Program class is default, as created by the MVC Application project template, and looks like this:

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

    public static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .Build();
}

I know that I should also have a UseIISIntegration call somewhere in there, and that Kestrel should be somehow involved, but I know nothing more than that.

Could somebody please give me an example on what the content of the Program class should look in order than my MVC app is properly configured for hosting on IIS. The MS Docs Host ASP.NET Core on Windows with IIS topic only has this less than meager example:

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
        ...

Answer 1

In Asp.Net Core 1.x as you are accustom to when enabling the IISIntegration components you would have done

var host = new WebHostBuilder()
    .UseKestrel()
    .UseIISIntegration()
    ...

as both UseKestrel and UseIISIntegration are required.

In the more recent version, Asp.Net Core 2.x, that has been combined inside the WebHost.CreateDefaultBuilder method

The following defaults are applied to the returned WebHostBuilder: use Kestrel as the web server, set the ContentRootPath to the result of GetCurrentDirectory(), load IConfiguration from 'appsettings.json' and 'appsettings.[EnvironmentName].json', load IConfiguration from User Secrets when EnvironmentName is 'Development' using the entry assembly, load IConfiguration from environment variables, configures the ILoggerFactory to log to the console and debug output, enables IIS integration, enables the ability for frameworks to bind their options to their default configuration sections, and adds the developer exception page when EnvironmentName is 'Development'

To quote the documentation again

A typical Program.cs calls CreateDefaultBuilder to begin setting up a host. CreateDefaultBuilder configures Kestrel as the web server and enables IIS integration by configuring the base path and port for the ASP.NET Core Module

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
    ...

    In Asp.Net Core 1.x as you are accustom to when enabling the IISIntegration components you would have done

var host = new WebHostBuilder()
    .UseKestrel()
    .UseIISIntegration()
    ...

Using the WebHostBuilder is still a supported approach with ASP.NET Core 2.x.

Reference Host ASP.NET Core on Windows with IIS

For more information on hosting in Asp.Net Core

Reference Hosting in ASP.NET Core