如何將配置對象從appsettings.json正確綁定到用戶對象

Question

我在.net Core 1.1, 上啓動了一些基礎項目，我希望將appsettings.json的某些屬性映射到對象，但我可能無法理解正確名稱約定或相當基本的東西

Regarding MSDN使用選項和配置對象部分， 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": "" 
    } 
    } 
} 

我添加了自定義的類

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; } 
    } 

我添加下面的代碼到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 - 價值containes空值在XXXController構造函數。

但在JsonConfigurationProvider好像框架顯示mappet值配置財產

任何想法裏面？

Answer 1

在ConfigureServices方法改變：

services.Configure<XXXOptions>(Configuration); 

到

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