将app.config添加到.net core 3.1 web应用程序接口应用程序

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft": "Warning",
      "Microsoft.Hosting.Lifetime": "Information"
    }
  },
  "ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\\mssqllocaldb;Database=MyDatabase;Trusted_Connection=True;"
  },
  "AppSettings": {
    "ApiKey": "your-api-key",
    "MaxItemsPerPage": 20
  }
}

public void ConfigureServices(IServiceCollection services)
{
    // 添加配置服务
    services.Configure<AppSettings>(Configuration.GetSection("AppSettings"));
}

public class AppSettings
{
    public string ApiKey { get; set; }
    public int MaxItemsPerPage { get; set; }
}

public class MyService
{
    private readonly AppSettings _appSettings;

    public MyService(IOptions<AppSettings> appSettings)
    {
        _appSettings = appSettings.Value;
    }

    public void DoSomething()
    {
        string apiKey = _appSettings.ApiKey;
        int maxItemsPerPage = _appSettings.MaxItemsPerPage;

        // 使用配置值进行操作
    }
}