1     public class ConfigHelper
 2     {
 3         private static IConfiguration Config = null; //ConfigurationRoot
 4         public static void _Init(IConfiguration Configuration)
 5         {
 6             Config = Configuration;
 7         }
 8 
 9         public static string Get(string Key)
10         {
11             IConfigurationSection ISection = Config.GetSection(Key);
12             return ISection.Value;
13         }
14 
15         public static void Set(string Key,string Value)
16         {
17             IConfigurationSection ISection = Config.GetSection(Key);
18             ISection.Value = Value;
19         }
20     }

1  public Startup(IConfiguration configuration)
2         {
3             Configuration = configuration;
4             ConfigHelper._Init(configuration); //配置ConfigHelper
5         }

 1 // appsettings.json 文件如下
 2 //{
 3 //    "AppSettings": {
 4 //    "downloadFileUrl": "https://hualai-glotx",
 5 //    "localFileUrl": "D:\\mydata4vipday_en.datx",
 6 //    "RefreshTokenValidDays": 30
 7 //  }
 8 //}
 9 
10 //测试调用
11 ConfigHelper.Get("AppSettings:localFileUrl");