【.net core】读取配置文件Configuration

参考：

https://blog.csdn.net/CsethCRM/article/details/80481020

假设本地json文件如下：

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "ConnectionStrings": {
    "DefaultConnection": "this is a nortal database"
  },
  "AllowedHosts": "*"
}

 

总结起来有两种方式：

 

1、通过直接读取

//通过Configuration来获取配置项中的内容
var devcon = Configuration.GetConnectionString("DefaultConnection");    //Configuration["ConnectionStrings:DefaultConnection"];
var normal_con = Configuration["ConnectionStrings:DefaultConnection"];

2、稍微复杂一点

a、在StartUp类的ConfigureService添加

services.Configure<Contention>(Configuration.GetSection("ContentionString"));//注册TOption实例对象

b、在Modes里创建节点相同类

public class Contention
    {
        public string DefaultConnection{ get; set; }
    }

c、使用时需要在Controller里读取

private readonly Contention contentions;

public ContentController(IOptions<Contention> option)
{
　　Contentions= option.Value;
}