{
 "SettingPath": {
 "VideoFilePath": "C:\\Users\\89275\\Desktop\\Projects\\mv",
 "FfmpegPath": "C:/Users/89275/Desktop/Projects/mv/ffmpeg.exe",
 "FtpPath": "http://192.168.254.1/videofile",
 "VirtualPath": "/videoplay"
 },
 "RedisPath":"192.168.0.108:6379"
}

  public class HomeController : Controller
 {
  //环境变量
  private readonly IHostingEnvironment hostingEnvironment;
  private IConfiguration Configuration;
  public HomeController(IHostingEnvironment hostingEnvironment, IConfiguration configuration)
  {
   this.hostingEnvironment = hostingEnvironment;
   Configuration = configuration;
  }

  pubilc void GetRedisPath()
  {
   string redisPath = Configuration["RedisPath"];
  }
 }

   services.AddOptions();
   //SettingPath极为Model
   services.Configure<SettingPath>(Configuration.GetSection("SettingPath"));

 public class HomeController
 {

  public SettingPath settingPath;
  private ILog log = LogManager.GetLogger(Startup.repository.Name, typeof(VideosController));
  public HomeController(IOptions<SettingPath> option)
  {
   settingPath = option.Value;
  }

  public void GetVideoPath()
  {
   string path=SettingPath.VideoFilePath
  }
 }

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Options;
using System;

namespace Common
{
 public class ConfigurationHelper
 {
  public IConfiguration config { get; set; }
  public ConfigurationHelper()
  {
   IHostingEnvironment env = MyServiceProvider.ServiceProvider.GetRequiredService<IHostingEnvironment>();
   config = new ConfigurationBuilder()
    .SetBasePath(env.ContentRootPath)
    .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
    .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
    .AddEnvironmentVariables()
    .Build();
  }
  public T GetAppSettings<T>(string key) where T : class, new()
  {
   var appconfig = new ServiceCollection()
    .AddOptions()
    .Configure<T>(config.GetSection(key))
    .BuildServiceProvider()
    .GetService<IOptions<T()
    .Value;
   return appconfig;
  }
 }
 //我比较喜欢单独放这个类，但是这样放更明显
 public class MyServiceProvider
 {
  public static IServiceProvider ServiceProvider { get; set; }
 }
}

 MyServiceProvider.ServiceProvider = app.ApplicationServices;

 string path = new ConfigurationHelper().config["RedisPath"];
   SettingPath pathss = new ConfigurationHelper().GetAppSettings<SettingPath>("SettingPath");