如何在StructureMap Registy构造函数中获取实例？

Question

如何在StructureMap Registy构造函数中获取某种类型的实例(在不同的注册表中注册)？我想使用这样的代码:

    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是应用程序设置的接口.实现此接口的具体类型(当前为ConfigFileApplicationSettings类)在另一个注册表中注册,如下所示:

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

这两个注册表都在Bootstrapper中注册:

        #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

当我尝试在注册表构造函数中获取IApplicationRegisty的实例时,我遇到了错误(当然).我没有完全理解如何以正确的方式使用StructureMap.也许我应该以不同的方式做事.但无论如何我可以在Registry构造函数中获得早期注册的某种类型的实例吗？

Answer 1

我今天遇到了同样的问题.Jeremy Miller(没有关系:))的答案是StructureMap没有设置为在配置时创建实例.

他推荐的解决方法和我使用的是为设置创建一个容器.这是我的解决方案.

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.
    }
}

我将所有设置移动到自己的注册表中,并确保在依赖注册表之前配置设置注册表.

希望这可以帮助.