C#不同类别的清单 [英] C# List of different classes

问题描述

我没有找到答案.

我需要一个包含不同类的列表，每个类都是基类BaseA固有的，但是每个类都将具有其他类不会拥有的属性，或者某些使用相同类的属性.

I need a List that contains different classes, each of them inherent from a base class BaseA, but each of them will have properties others will not have, or some that uses the same class will.

public class BaseA
{
    public int ID = 0;
}

public class AA : BaseA
{
    public int AID = 0;
}

public class AB : BaseA
{
    public int BID = 1;
}

public class AC : BaseA
{
    public int CID = 0;
}

现在的问题是，我如何获得一个可能包含AA，AB和AC类的列表，而编辑器不会认为我只使用其中的一个.

Now the question is how do I get a single List that may contain class AA,AB and AC and the editor will not think i'm only working with one of them.

我试图制作List<BaseA>，但是这只会暴露bassA属性，而我需要做的就是能够执行List[0].AID，如果我说的是AA，它将理解AID的含义.课.

I tried to made the List<BaseA>, but this will only expose the bassA properties, and what i need is like to be able to do List[0].AID where it will understand what AID means if i'm talking about the AA class.

我可能全都错了，有人可以指出我正确的方向吗?

I may be going it all wrong, can someone point me to the right direction?

推荐答案

您可以尝试使用 Linq :

  List<BaseA> list = ...

  var result = list
    .OfType<AA>() // Filter out AA instances only
    .ElementAt(0) // or just First();
    .AID; 

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