c# - 发布 .net 核心应用程序时出错 "no startup configured "

Question

两天以来，当我在 IIS 上发布我的 .net 核心应用程序时发生错误。
我的角度部分运行良好，但 .net 核心部分无法加载。

在我的 startup.cs 中:

  `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.AddCors();
        services.AddDbContext<HistoriqueContext>(options =>
            options.UseSqlServer(Configuration.GetConnectionString("HistoriqueContext"),b=>b.UseRowNumberForPaging()));
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        app.UseCors(builder => builder
        .WithOrigins("http://localhost:4200")
        .AllowAnyMethod()
        .AllowAnyHeader()
        .AllowCredentials());
        app.UseAuthentication();

        app.Use(async (context, next) =>
        {
            await next();
            if (context.Response.StatusCode == 404 && !Path.HasExtension(context.Request.Path.Value))
            {
                context.Request.Path = "/index.html";
                await next();
            }
        });

        app.UseStaticFiles();
        //app.UseCorsMiddleware();
        app.UseMvc();
    }
}`

在我的 Program.cs 中:

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

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

在 file://servername/appcore/logs/中的日志:

Application startup exception: System.InvalidOperationException: No startup configured. Please specify startup via WebHostBuilder.UseStartup, WebHostBuilder.Configure, injecting IStartup or specifying the startup assembly via StartupAssemblyKey in the web host configuration.
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureStartup()
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.EnsureApplicationServices()
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.Initialize()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()
Hosting environment: Production
Content root path: C:\inetpub\wwwroot\DSMHistory
Now listening on: http://127.0.0.1:38556
Application started. Press Ctrl+C to shut down.
Application is shutting down...

如果有人有同样的问题告诉我，谢谢关注

Answer 1

我遇到了同样的问题，结果我在 Startup.cs 构造函数中发生了一个方法调用，该调用引发了异常并导致了这个确切的错误。