NET6 web项目读取 appsettings配置文件

可以在appsettings中配置数据量连接字符串等数据，便于项目发布后的配置

首先，创建 ConfigHelper类

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namespace TestProject.services {     public class ConfigHelper     {         private static IConfiguration _config;           public ConfigHelper(IConfiguration configuration)         {             _config = configuration;         }           /// <summary>         /// 读取appsettings.json文件中指定节点信息         /// </summary>         /// <param name="sessions"></param>         /// <returns></returns>         public static string ReadAppSettings(params string[] sessions)         {             try             {                 if (sessions.Any())                 {                     return _config[string.Join(":",sessions)];                 }             }             catch             {                 return "";             }             return "";         }           /// <summary>         /// 读取实体信息         /// </summary>         /// <typeparam name="T"></typeparam>         /// <param name="session"></param>         /// <returns></returns>         public static List<T> ReadAppSettings<T>(params string[] session)         {             List<T> list = new List<T>();             _config.Bind(string.Join(":",session),list);             return list;         }     } }

　　然后在Program.cs中添加如下代码注入服务

var builder = WebApplication.CreateBuilder(args);

IConfiguration configuration = new ConfigurationBuilder().AddJsonFile("appsettings.json").Build();

builder.Services.AddSingleton(new ConfigHelper(configuration));

在 appsettings.json中添加如下代码

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "Test": {
    "testStr1": "testvalue1",
    "testStr2": "testvalue2"
  },
}

最后，可以在项目的任意地方读取配置文件数据

string str = ConfigHelper.ReadAppSettings("Test", "testStr1");

可以获取 str 的值为 testvalue1。

本文参考简书文章，写文章 - .net core (.net6) 读取配置文件 appsettings.json  - 简书 (jianshu.com)

感谢原作者。