我需要一些关于继承类(抽象)的示例帮助。我无法使用我的ToCSV()函数,因为它返回了BananaPart列表,而C#想要FruitPart列表。有什么解决办法吗?
using System;
using System.Collections.Generic;
public class Program
{
public static void Main()
{
FruitFactory fruitFactory = new FruitFactory();
Fruit myFruit = fruitFactory.Create("banana");
myFruit.FruitPart.ForEach(f => Console.WriteLine(f.ToString()));
}
}
public class FruitFactory {
public Fruit Create(string fruitType) {
switch(fruitType) {
case "banana":
return new Banana();
break;
default:
throw new Exception("undefined fruitType");
}
}
}
public abstract class Fruit {
protected string _name;
protected List<FruitPart> _fruitPart;
public Fruit() {
this._name = "A fruit";
}
public string Name { get { return this._name; } }
public List<FruitPart> FruitPart { get { return this._fruitPart; } }
}
public abstract class FruitPart { }
public class Banana : Fruit {
public Banana() : base() {
this._name = "banana";
this._fruitPart = ToCSV();
}
public List<BananaPart> ToCSV(){
return new List<BananaPart> { new BananaPart(5, "10"), new BananaPart(10, "20"), new BananaPart(20, "40") };
}
}
public class BananaPart : FruitPart {
private int _seed;
private string _dimensionPart;
public BananaPart (
int seed,
string dimensionPart
) {
this._seed = seed;
this._dimensionPart = dimensionPart;
}
}
我很乐意了解更多相关内容!非常感谢您提前的帮助!