更改继承属性的类型（一个继承型） [英] Changing the Type of a inherited property (to a inherited type)

问题描述

我有除其他元信息，其中包含一个有向图的根节点的类。让我们称之为容器类。此容器可以出现在两种不同的模式，编辑模式和配置模式。根据不同的模式，根节点是一个不同类型的 NodeEdit 或 NodeConfig ，从相同的子类继承两者

using C# I have a class which contains among other meta information the root node of a directed graph. Let's call this the Container-Class. This container can appear in two different modes, Editor-Mode and Configurator-Mode. Depending on the mode, the root-node is of a different type NodeEdit or NodeConfig, both inheriting from the same subclass.

public abstract class NodeBase
{
  string Name { get; set; }
  ...
}

public class NodeEdit : NodeBase ...
public class NodeConfig : NodeBase ...

有关容器中，我也创建一个基类，从它继承：

For the container, I also create a base class and inherit from it:

public abstract class ContainerBase
{
  NodeBase Root { get; set; }
  ...
}

在由ContainerBase继承创建编辑器 - 和Configuratorcontainer类，我想成为根的类型 - 特定的（从NodeBase继承）属性类型，如：

When creating the classes for Editor- and Configuratorcontainer by inheriting from ContainerBase, I want to become the type of the Root - property the specific (inherited from NodeBase) type like:

public class ContainerEditor : ContainerBase
{
  NodeEditor Root { get; set; }
  ...
}

但我不能改变ContainerBase定义的属性的类型。有没有办法解决这个问题的方法吗？我可以使用BaseNode型，并添加NodeEditor的元素像

But I cannot change the type of a property defined in ContainerBase. Is there a way to solve this problem? I can use the BaseNode-type, and add an element of NodeEditor like

ContainerEditorInstance.Root = new NodeEditor();

因为类型NodeEditor从类型BaseEditor继承，但在容器Editor类，我想明确地只允许根属性的类型为 NodeEditor 。
我可以在二传手检查并拒绝所有的节点，但这些类型的NodeEditor，但我想有属性是特定类型的，这样我就可以在编译时错误的检测任务。

because the type NodeEditor is inherited from type BaseEditor, but in the Container-Editor class, I want to explicitly only allow the type of the Root-property to be NodeEditor. I could check this in the setter and reject all nodes but those of type NodeEditor, but I'd like to have the property be of the specific type, so I can detect wrong assignments at compile-time.

在前进，结果谢谢
弗兰克

Thanks in advance,
Frank

推荐答案

您可以重新定义它：

public class ContainerEditor : ContainerBase
{
  public NodeEditor Root {
    get { return (NodeEditor)base.Root; }
    set { base.Root = value; }
  }
  ...
}

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