在C＃中的继承接口中分离Get / Set属性 [英] Separate Get/Set property in inherited interfaces in C#

问题描述

我有两个接口和一个实现： IState ， IEditableState 和 State ，其中我有一个名为 Value 的整数属性。

I have two interfaces and one implementation: IState, IEditableState andState, in which I have a single integer property called Value.

我想要使用 IState 到获取此属性， IEditableState 到设置它。

I want to be usingIStateto get this property andIEditableState to set it.

我的代码看起来如此：

interface IState { int Value { get; } }

interface IEditableState:IState { int Value { set; } }

class State:IEditableState {
    int Value { get; set; }
}

显然，我收到 IEditableState的警告。值隐含地隐藏 IState.Value ，为了清楚起见，我应该添加关键字new。直觉上，这是相同的属性，所以我不明白为什么它应该是新的。

Apparently, I get a warning that IEditableState.Value implicitely hides IState.Value and that I should add the keyword new for clarity. Intuitively, this is the same property so I don't understand why it should be new.

这样做的干净方法是什么？

What would be the "clean" way to do this?

推荐答案

在接口中，无法定义虚拟/覆盖，因此您使用 new 继承接口的实现 - 在类中，这也意味着 Value {get;组; } 和 IState.Value {get; } 并排，即使后者总是引用前者。

In interfaces, there is no way to define virtual/overrides, so you're stuck using a new implementation for inherited interfaces - in classes, this will also mean a Value { get; set; } and IState.Value { get; } side by side, even if the latter is always going to reference the former.

或者，这确实出现在.NET框架中本身，并通过为 Readonly 变体提供单独的接口来规避，例如 IList< T> 和 IReadOnlyList< T> 而不是继承的接口;这允许实现具有单个属性，以满足两者中具有相同名称的项。

Alternatively, this does come up in the .NET framework itself, and is circumvented by having a separate interface for the Readonly variants, such as with IList<T> and IReadOnlyList<T>, rather than an inherited interface; this allows implementations to have a single property that satisfies those items with the same name in both.

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