无法绑定到 LocalHost（无效异常）错误 Visual Studio 2022答案

【问题标题】：Failed to bind to LocalHost (invalid exception) error Visual Studio 2022无法绑定到 LocalHost（无效异常）错误 Visual Studio 2022
【发布时间】：2022-02-24 22:29:50
【问题描述】：

我正在构建一个全新的 ASP.Net Core MVC 项目。当我尝试在调试器中运行它时，我得到了这个错误：

System.IO.IOException
  HResult=0x80131620
  Message=Failed to bind to address https://localhost:5001.
  Source=Microsoft.AspNetCore.Server.Kestrel.Core
  StackTrace:
   at Microsoft.AspNetCore.Server.Kestrel.Core.LocalhostListenOptions.<BindAsync>d__2.MoveNext()
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.ConfiguredTaskAwaitable.ConfiguredTaskAwaiter.GetResult()

  This exception was originally thrown at this call stack:
    [External Code]

Inner Exception 1:
AggregateException: One or more errors occurred. (An invalid argument was supplied.) (An invalid argument was supplied.)

Inner Exception 2:
SocketException: An invalid argument was supplied.

错误发生在我的 Program.cs 类中：

public class Program
{
    public static void Main(string[] args)
    {
        CreateHostBuilder(args).Build().Run(); //<-- ERROR BREAKS HERE
    }

    public static IHostBuilder CreateHostBuilder(string[] args) =>
        Host.CreateDefaultBuilder(args)
            .ConfigureWebHostDefaults(webBuilder =>
            {
                webBuilder.UseStartup<Startup>();
            });
}

我发现this SO post 遇到了类似的问题，但我的问题不是地址已在使用中，而且我不在 Mac 上。在撰写本文时，我已更新到最新的 VS 版本 17.1.0，但错误仍然存在。

谁能提供建议？

编辑：我尝试使用在创建时分配给应用程序的 localhost 端口号 7161 和 5161，但我得到了相同的错误：“SocketException: An invalid argument was provided。”

我也尝试在 Windows 防火墙中打开端口。没有变化。

编辑 2：这也是 Startup.cs 中的代码。

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddHttpClient();

        services.AddControllersWithViews();

        // declare external services and database contexts

        services.AddDistributedMemoryCache();

        services.AddHsts(options =>
        {
            options.Preload = true;
            options.IncludeSubDomains = true;
            options.MaxAge = TimeSpan.FromDays(1);
        });

        // Adds the HTTPS Redirect
        services.AddHttpsRedirection(options =>
        {
            options.RedirectStatusCode = StatusCodes.Status307TemporaryRedirect;
            options.HttpsPort = 5001;
        });

        services.AddSession(options =>
        {
            options.IdleTimeout = TimeSpan.FromMinutes(20);
            options.Cookie.HttpOnly = true;
            options.Cookie.IsEssential = true;
            options.Cookie.Name = "GLEntry.Authentication";
        });

        // Add IHttpContextAccessor
        services.AddHttpContextAccessor();

        services.AddMvc();

        // May need this for application authentication? 
        services.AddAuthentication(IISDefaults.AuthenticationScheme);
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }

        app.UseHttpsRedirection();

        app.UseStaticFiles();

        app.UseRouting();

        app.UseAuthentication();
        app.UseAuthorization();

        app.UseSession();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllerRoute(
                name: "default",
                pattern: "{controller=Home}/{action=Index}/{id?}");
        });
    }
}

【问题讨论】：

嗯，消息很清楚，它无法绑定地址，这是因为它正在使用中造成的......再次检查开放端口（或者您正在尝试执行两个项目）同一个端口？）
你也必须发布启动，因为你在你的 webbuilder 中使用它
@Serge 启动发布

标签： c# asp.net-core-mvc localhost

【解决方案1】：

所以这完全没有意义，但我可以通过将调试器设置为使用“IIS Express”而不是项目名称来使其工作。它是 VS 中绿色“播放”按钮旁边的下拉菜单；不知道那个设置叫什么。

不管怎样，这已经帮我解决了。

【讨论】：