C# 如何在visual studio代码中添加和访问appsettings.config文件中的键值对？

我已经使用visual studio代码上的.net内核和sdk在控制台应用程序中编写了我的C#逻辑。我试图添加一个配置文件来配置某些参数，但是，一旦创建了appsettings.json文件，我就无法在代码中访问它。需要帮助才能访问配置文件中的值

using System;
using System.IO;
using Microsoft.Extensions.Configuration;

namespace testapp
{
    class Program
    {
        static void Main(string[] args)
        {
        var appSettings = new Config();
           var config = new ConfigurationBuilder()
             .SetBasePath(Directory.GetCurrentDirectory())
             .AddEnvironmentVariables() //This line doesnt compile 
             .AddJsonFile("appsettings.json", true, true)
             .Build();
           config.Bind(appSettings);       //This line doesnt compile        

            Console.WriteLine("Hello World!");
            Console.WriteLine($" Hello {appSettings.name} !"); 
        }
    }
    public class Config
    {
       public string name{ get; set; }
    }
}

HomeController.cs

    public class HomeController : Controller {

       private readonly IConfiguration _config;

       public HomeController(IConfiguration config) { _config = config; }

       public IActionResult Index() {

          Console.WriteLine(_config.GetSection("AppSettings:Token").Value);

          return View();

           }
   }

appsettings.json

{
  "AppSettings": {
    "Token": "T21pZC1NaXJ6YWVpWhithOutStar*"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*"
}

试试这个-

using System;
using Microsoft.Extensions.Configuration;

namespace testapp
{
    class Program
    {            
        static void Main(string[] args)
        {
           var appSettings = new Config();
           var config = new ConfigurationBuilder()
             .SetBasePath(Directory.GetCurrentDirectory())
             .AddEnvironmentVariables()
             .AddJsonFile("appsettings.json", true, true)
             .Build();
           config.Bind(appSettings); 

           Console.WriteLine($" Hello {appSettings.name} !");
        }
    }

    public class Config
    {
       public string name{ get; set; }
    }
}

appsettings.json

{
  "AppSettings": {
    "Token": "T21pZC1NaXJ6YWVpWhithOutStar*"
  },
  "Logging": {
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "AllowedHosts": "*"
}

---

显示您的

appsettings.json

{“name”：“Gary”}尝试了此操作，但代码未编译，因为IConfigurationRoot不包含Bind方法的定义。使用此

var config=new ConfigurationBuilder（）

创建

ConfigurationBuilder

的对象我已按建议完成，但仍然，它不能编译。您是否能够在您的终端编译它？使用系统；使用Microsoft.Extensions.Configuration；命名空间testapp{class程序{static void Main（string[]args）{var appSettings=new Config（）；var Config=new ConfigurationBuilder（）.AddJsonFile（“appSettings.json”，true，true）。Build（）；Config.Bind（appSettings）；Console.WriteLine（$“Hello{config.name}！”）；}}}public class config{public string name{get；set；}}}}}我已经编辑了我的答案，

basepath

和

AddEnvironmentVariables

丢失了。你现在可以试试。