如何继承class int成员？

Question

我有这样一个基础class：

public class Marker {
     public int[] GetChildMarks() {
          //Somehow Get Child int members
     }
     public int ShallNotBeInArray;
}

public class MyMarker : Marker {
   public int Size, Number;
}

public class TedsMarker : Marker {
   public int Power;
}

//... somewhere in main
var m = new MyMarker(){Size=3, Number = 666};
var arr = m.GetChildMarks(); // [Size, Number, Any other ints in MyMarker ]
var t = new TedsMarker() {Power=999};
var arr2 = t.GetChildMarks(); // [Power, Any other ints in TedsMarker]

那么有可能吗？如何使用反射在 C# 中做这样的事情？

Answer 1

可以这样实现：

public class Marker
{
    public int[] GetChildMarks()
    {
        return new int[]
        {
            (int)GetType().GetField("Size").GetValue(this),
            (int)GetType().GetField("Number").GetValue(this)
        };
    }
    public int ShallNotBeInArray;
}

这假设 child class 有这两个字段并且它们是 int 类型。

由于没有强制执行（实际上不可能，因为这些是字段，而不是属性），这种方法很适合产生运行时错误。

编辑：

可以像这样检索所有字段的值：

public class Marker
{
    public int[] GetChildMarks()
    {
        List<int> allIntegerFields = new List<int>();
        // DeclaredOnly: only get fields declared by this type, not the ones declared by base classes
        // Public | Instance: Only get non-static, public fields
        foreach(FieldInfo fieldInfo in GetType().GetFields(BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.Instance))
        {
            if(fieldInfo.FieldType == typeof(int))
            {
                allIntegerFields.Add((int)fieldInfo.GetValue(this));
            }
        }
        return allIntegerFields.ToArray();
    }
    public int ShallNotBeInArray;
}

如何继承class int成员？

How to get inheriting class int members?

.net

c#

reflection

inheritance

.net-4.0