如何将配置对象从appsettings.json正确绑定到用户对象

Question

我在.net Core 1.1, 上启动了一些基础项目，我希望将appsettings.json的某些属性映射到对象，但我可能无法理解正确名称约定或相当基本的东西

Regarding MSDN使用选项和配置对象部分， 它很容易使用它。 我加入的下行appsettings.json

{ 
    "Logging": { 
    "IncludeScopes": false, 
    "LogLevel": { 
     "Default": "Warning" 
    } 
    }, 

    "XXXOptions": { 
    "X1": { 
     "AppId": "11", 
     "AppCode": "22" 
    }, 
    "X2": { 
     "AppId": "", 
     "AppCode": "" 
    } 
    } 
} 

我添加了自定义的类

public class XXXOptions 
    { 
     public XXXOptions() 
     { 
     } 
     public X1 X1{ get; set; } 
     public X2 X2{ get; set; } 
    } 

    public class X1 
    { 
     public int AppId { get; set; } 
     public int AppCode { get; set; } 
    } 

    public class X2 
    { 
     public int AppId { get; set; } 
     public int AppCode { get; set; } 
    } 

我添加下面的代码到Startup.cs

public void ConfigureServices(IServiceCollection services) 
     { 
      // Adds services required for using options. 
      services.AddOptions(); 

      // Register the IConfiguration instance which MyOptions binds against. 
      services.Configure<XXXOptions>(Configuration); 

      // Add framework services. 
      services.AddMvc(); 
     } 

public class XXXController : Controller 
    { 
     private readonly XXXOptions _options; 
     public XXXController(IOptions<XXXOptions> optionsAccessor) 
     { 
      _options = optionsAccessor.Value; 
     } 

     public IActionResult Index() 
     { 
      var option1 = _options.X1; 
      return Content($"option1 = {option1.AppCode}, option2 = {option1.AppId}"); 
      return View(); 
     } 
    } 

optionsAccessor.Value - 价值containes空值在XXXController构造函数。

但在JsonConfigurationProvider好像框架显示mappet值配置财产

任何想法里面？

Answer 1

在ConfigureServices方法改变：

services.Configure<XXXOptions>(Configuration); 

到

services.Configure<XXXOptions>(Configuration.GetSection("XXXOptions"));