.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();
         }
     }
 }