.net core 读取appsettings 的配置

{
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Warning"
    }
  },
  "ConnectionStrings": {
    "CxyOrder": "Server=***;Database=***;User ID=***;Password=***;Trusted_Connection=False;"
  },
  "Appsettings": {
    "SystemName": "PDF .NET CORE",
    "Date": "2017-07-23",
    "Author": "PDF"
  },
  "ServiceUrl": "https://www.baidu.com/getnews"
}

调用的方法 appsettings.json

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Configuration.Json;

namespace NetCoreOrder.Common
{
    /// <summary>
    /// 读取配置文件
    /// </summary>
    public class AppConfigurtaionServices
    {
        public static IConfiguration Configuration { get; set; }
        static AppConfigurtaionServices()
        {
            //ReloadOnChange = true 当appsettings.json被修改时重新加载            
            Configuration = new ConfigurationBuilder()
            　　.Add(new JsonConfigurationSource { Path = "appsettings.json", ReloadOnChange = true })
            　　.Build();            
        }
    }
}

　　

读取一级配置节点配置

AppConfigurtaionServices.Configuration["ServiceUrl"];
//得到 https://www.baidu.com/getnews

读取二级子节点配置

AppConfigurtaionServices.Configuration["Appsettings:SystemName"];
//得到 PDF .NET CORE
AppConfigurtaionServices.Configuration["Appsettings:Author"];
//得到 PDF

最后你执行的时候八成会遇到这个错误

The type initializer for '***' threw an exception. 

这时候你需要

右键appsettings.json>>>属性》》》输出到目录改为始终复制

 不复制的话读不到这个文件

仅仅为了做个笔记

转自：

https://www.cnblogs.com/pudefu/p/7580722.html

https://www.cnblogs.com/likui-bookHouse/p/11281074.html

还有其他的写法：

https://blog.csdn.net/weixin_34309435/article/details/86028477