如何在appsetting.json (asp.net内核)中加载子对象

{
  "DatabaseSettings": {
    "ConnectionString": "your_connection_string",
    "MaxConnections": 10,
    "Timeout": 30
  }
}

public void ConfigureServices(IServiceCollection services)
{
    // 加载appsetting.json文件
    IConfiguration configuration = new ConfigurationBuilder()
        .SetBasePath(Directory.GetCurrentDirectory())
        .AddJsonFile("appsettings.json")
        .Build();

    // 将Configuration对象注册为服务，以便在应用程序的其他部分使用
    services.AddSingleton(configuration);
}

public class DatabaseService
{
    private readonly IConfiguration _configuration;

    public DatabaseService(IConfiguration configuration)
    {
        _configuration = configuration;
    }

    public void DoSomething()
    {
        // 使用子对象的配置信息
        string connectionString = _configuration.GetSection("DatabaseSettings:ConnectionString").Value;
        int maxConnections = _configuration.GetSection("DatabaseSettings:MaxConnections").Value;
        int timeout = _configuration.GetSection("DatabaseSettings:Timeout").Value;

        // 执行相应的操作
        // ...
    }
}

{
  "DatabaseSettings": {
    "Connection": {
      "ConnectionString": "your_connection_string",
      "MaxConnections": 10,
      "Timeout": 30
    },
    "Logging": {
      "LogLevel": "Information"
    }
  }
}

string connectionString = _configuration.GetSection("DatabaseSettings:Connection:ConnectionString").Value;
int maxConnections = _configuration.GetSection("DatabaseSettings:Connection:MaxConnections").Value;
int timeout = _configuration.GetSection("DatabaseSettings:Connection:Timeout").Value;
string logLevel = _configuration.GetSection("DatabaseSettings:Logging:LogLevel").Value;