IIS Express 上的 ASP.NET Core 3.1 应用程序:“无法访问此站点" [英] ASP.NET Core 3.1 app on IIS Express: "This site can't be reached"

问题描述

我正在开发一个从 v2.2 升级到 v3.1 的 ASP.NET Core 应用程序.

当我在没有启用 SSL 的情况下使用 IIS Express 启动应用程序时，我在 Google Chrome 中收到此错误:

<块引用>

无法访问此站点.本地主机拒绝连接.

当我启用 SSL 时，我收到此错误:

<块引用>

无法找到此本地主机页面.找不到该网址的网页:.

当我创建一个新的空白 ASP.NET Core 3.1 Web 项目并在 IIS Express 上使用相同的设置运行它时，它运行良好.

根据其他地方的建议，我尝试了以下方法:

• 清理和重建
• 删除 web 项目中的 .vs 文件夹
• 更改端口号(当前为 localhost:54236).
• 启用/禁用 SSL
• 重新启动我的机器
• 在单独的工作目录中从 Git 加载我的解决方案的新副本并尝试运行它.

我不知所措.

这是我的 launchSettings.json 文件:

<代码>{iis设置":{windowsAuthentication":假，匿名身份验证":真，iis":{"applicationUrl": "http://myapplication.debug",ssl端口":0},iisExpress":{"applicationUrl": "http://localhost:54236",sslPort":44367}},个人资料":{IIS Express":{"commandName": "IISExpress",启动浏览器":真，环境变量": {"ASPNETCORE_ENVIRONMENT": "开发"}},网络":{"commandName": "项目",启动浏览器":真，环境变量": {"ASPNETCORE_ENVIRONMENT": "开发"},"applicationUrl": "https://localhost:5001;http://localhost:5000"}}}

与新项目的 launchSettings.json 文件进行比较时，我看不出任何显着差异.还有什么会导致这个失败吗?

我应该注意到我确实更改了端口号 - 它最初在端口号 50192，但是当我尝试将网站运行到该地址时 (

解决方案

从 aspnetcore 2.2 升级到 3.1 时，我的 Program.cs 中似乎缺少某些内容.

直到现在我有这个:

return WebHost.CreateDefaultBuilder(args).ConfigureServices(services => services.AddAutofac()).UseStartup();

在查看一个新的 v3.1 项目时，它有类似的东西:

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

I'm working on an ASP.NET Core application that I have upgraded from v2.2 to v3.1.

When I start the application using IIS Express without SSL enabled, I get this error in Google Chrome:

This site can't be reached. localhost refused to connect.

When I enable SSL, I get this error instead:

This localhost page can't be found. No web page was found for the web address: https://localhost:44367.

I have have an IIS website configured to the directory where my application sits. In the project settings, I can set the 'Launch' setting to 'IIS', but when I do this I also get the same error.

Screenshot of my web project settings: .

When I create a new blank ASP.NET Core 3.1 web project and run it with the same settings on IIS Express, it runs fine.

Based on suggestions elsewhere, I have tried the following:

• Cleaning and rebuilding
• Deleting the .vs folder in the web project
• Changing the port number (currently it is localhost:54236).
• Enabling/disabling SSL
• Restarting my machine
• Loading up a fresh copy of my solution from Git on a separate working directory and trying to run it.

I'm at a loss.

Here is my launchSettings.json file:

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iis": {
      "applicationUrl": "http://myapplication.debug",
      "sslPort": 0
    },
    "iisExpress": {
      "applicationUrl": "http://localhost:54236",
      "sslPort": 44367
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },
    "Web": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      },
      "applicationUrl": "https://localhost:5001;http://localhost:5000"
    }
  }
}

When comparing with the launchSettings.json file of a fresh project I can't see any notable difference. Is there anything else that would cause this failure?

I should note that I did change the port number - it was initially at port number 50192, but when I attempt to run the website to that address (

解决方案

It appears I was missing something in my Program.cs when upgrading from aspnetcore 2.2 to 3.1.

Until now I had this:

return WebHost.CreateDefaultBuilder(args)
       .ConfigureServices(services => services.AddAutofac())
       .UseStartup<Startup>();

On looking at a fresh v3.1 project, it had something like this instead:

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

这篇关于IIS Express 上的 ASP.NET Core 3.1 应用程序:“无法访问此站点"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！