如何创建包含包含工厂的控制器的工厂

时间:2012-07-23 23:42:13

标签: c# asp.net-mvc factory

我正在尝试创建一个工厂,它将在字典中保存一个“子”控制器列表。这些子控制器必须包含工厂,以便它们可以访问其他子控制器。这是工厂:

public interface IChildControllerFactory
{
    IChildController GetChildController(object item);
}


public class ChildControllerFactory : IChildControllerFactory
{
    private Dictionary<string, IChildController> _childControllerDictionary;

    public ChildControllerFactory(IEnumerable<IChildController> childControllers)
    {
        var childControllerDictionary = new Dictionary<string, IChildController>();

        //code to build dictionary
        _childControllerDictionary = childControllerDictionary;
    }

    public IChildController GetChildController(object item)
    {
        return _childControllerDictionary.Where(x => x.Key == item.GetType().Name).Select(x => x.Value).First();
    }
}

以下是子控制器的示例:

public class ChildController : Controller, IChildController<TViewModel, TModel>
{
    private IChildControllerFactory _childControllerFactory;

    public ChildController(IChildControllerFactory childControllerFactory) //this will cause a circular reference
    {
        _childControllerFactory = childControllerFactory;
    }

    public ActionResult GetChildViewModel(object child)
    {
        var model = _childControllerFactory.GetChildController(child).ToViewModel(survey);
        return PartialView("Child.ascx", model);
    }
}

继承的接口:

public interface IChildController<TViewModel, TModel>
{
    int Create(object item);
    object Save(object item);
    object ToViewModel(object item);
}

子控制器全部注册,工厂被指定为具有结构图的单身人士。

因为子控制器需要Factory,所以使用依赖注入在构造函数中设置工厂将导致循环引用,因为第一次初始化Factory时,它将初始化所有子控制器,并且每个子控制器将尝试初始化工厂(已经在执行)。

如何让工厂实例化所有子控制器,然后从这些子控制器访问它?

1 个答案:

答案 0 :(得分:1)

让我们考虑一下。 childController只有在分配了工厂权限后才能使用?因此,在创建childFactory之前,childControll实际上是无用的。那说我会做点什么:

public class ChildController : Controller, IChildController<TViewModel, TModel>
{
    private IChildControllerFactory _childControllerFactory;

    public ChildController() 
    {
    }

    public void setChildControllerFactory( IChildControllerFactory childControllerFactory )
    {
       _childControllerFactory = childControllerFactory;
    }

    public ActionResult GetChildViewModel(object child)
    {
        var model = _childControllerFactory.GetChildController(child).ToViewModel(survey);
        return PartialView("Child.ascx", model);
    }
}

所以你的ChildControllerFactory会是这样的:

public ChildControllerFactory(IEnumerable<IChildController> childControllers)
{
    var childControllerDictionary = new Dictionary<string, IChildController>();
    _childControllerDictionary = childControllerDictionary;
    for(IChildController i in _childControllerDictionary) i.setChildControllerFactory(this);
}

我没有测试它,但我没有看到具体对象的必要性,因为你在工厂中存储了这些对象的字典,所以工厂传递了工厂。