.Net Core控制台应用加载读取Json配置文件

⒈添加依赖

　　Microsoft.Extensions.Configuration

　　Microsoft.Extensions.Configuration.FileExtensions

　　Microsoft.Extensions.Configuration.Json

⒉在项目中添加Json配置文件并将其复制到输出目录属性设置为“始终复制”

{
  "ConnectionStrings": {
    "StudyConnStr": "Data Source=.;Initial Catalog=Study;User ID=sa;Password=admin"
  }
}

⒊在代码中加载配置文件并读取相应内容

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

namespace Config_Test
{
    class Program
    {
        static void Main(string[] args)
        {
            var build = new ConfigurationBuilder();
            build.SetBasePath(Directory.GetCurrentDirectory());
            build.AddJsonFile("//Config//dbconfig.json", true, true);
            var dbConfig = build.Build();
            string dbConn = dbConfig.GetSection("ConnectionStrings").GetSection("StudyConnStr").Value;
            Console.WriteLine($"db连接字符串：{dbConfig["ConnectionStrings:StudyConnStr"]}");
            Console.WriteLine($"db连接字符串：{dbConn}");
            Console.ReadKey();
        }
    }
}