如何在StructureMap註冊構造函數中獲取實例？

Question

如何在StructureMap註冊構造函數中獲取某種類型的實例（在不同的註冊表中註冊）？我想要使​​用這樣的代碼：

public RepositoriesRegistry() 
    { 
     IApplicationSettings lApplicationSettings = 
      ObjectFactory.GetInstance<IApplicationSettings>(); 
     Debug.Assert(lApplicationSettings != null); 

     const string cSupportedDevicesConnectionString = 
      "metadata=res://*/Models.SupportedDevices.Database.SupportedDevicesModel.csdl|res://*/Models.SupportedDevices.Database.SupportedDevicesModel.ssdl|res://*/Models.SupportedDevices.Database.SupportedDevicesModel.msl;provider=System.Data.SqlClient;provider connection string=\"{0}\""; 
     string lSupportedDevicesConnectionString = 
      string.Format(cSupportedDevicesConnectionString, lDatabaseConnectionString); 
     SupportedDevicesEntities lSupportedDevicesEntities = 
      new SupportedDevicesEntities(lSupportedDevicesConnectionString); 
     ForRequestedType<SupportedDevicesEntities>().TheDefault.IsThis(
      lSupportedDevicesEntities); 
     ForRequestedType<ISupportedDevicesRepository>().TheDefault.IsThis(
      new SupportedDevicesRepository(lSupportedDevicesEntities)); 

    } 

IApplicationSettings是應用程序設置的接口。實現此接口（目前ConfigFileApplicationSettings類）的具體類型註冊在另一個註冊表這樣的：

public ApplicationServicesRegistry() 
    { 
     ForRequestedType<IApplicationSettings>().TheDefault.IsThis(
      new ConfigFileApplicationSettings()); 
    } 

而且兩者登記在引導程序註冊：

 #region IBootstrapper Members 

    public void BootstrapStructureMap() 
    { 
     ObjectFactory.Initialize(InitalizeStructureMapContainer); 
    } 

    #endregion 

    #region Private properties 

    private static bool HasStarted { get; set; } 

    #endregion 

    #region Private methods 

    private void InitalizeStructureMapContainer(IInitializationExpression x) 
    { 
     x.IgnoreStructureMapConfig = true; 
     x.AddRegistry<ViewModelRegistry>(); 
     x.AddRegistry<ApplicationServicesRegistry>(); 
     x.AddRegistry<RepositoriesRegistry>(); 
     x.AddRegistry<DataOperationsRegistry>(); 
    } 

    #endregion 

當我試圖讓實例註冊表構造函數中的IApplicationRegisty我有一個錯誤（當然）。我沒有完全理解如何正確使用StructureMap。可能是我應該做一些不同的方式。但無論如何，我可以獲得一個在註冊表構造函數中提前註冊的某種類型的實例嗎？

Answer 1

今天我遇到了同樣的問題。 Jeremy Miller（無關係）的答案是StructureMap沒有設置爲在配置時創建實例。

他推薦的解決方法是，我使用的是爲設置創建容器。這是我的解決方案。

public class SettingsRegistry : Registry 
{ 
    public SettingsRegistry() 
    { 
     ForRequestedType<ISettingsProvider>().TheDefault.Is.OfConcreteType<AppSettingsProvider>(); 

     Scan(s => 
     { 
      s.TheCallingAssembly(); 
      s.With<SettingsScanner>(); 
     }); 
    } 
} 

public class RegistryNeedingSettings : Registry 
{ 
    public RegistryNeedingSettings() 
    { 
     var settingsContainer = new Container(new SettingsRegistry()); 
     var coreSettings = settingsContainer.GetInstance<CoreSettings>(); 

     //configuration needing access to the settings. 
    } 
} 

我感動的一切設置成自己的註冊表，並確保這些設置註冊表獲取相關的註冊表之前配置。

希望這會有所幫助。