组合设计模式

最新推荐文章于 2025-01-28 15:05:02 发布

原创最新推荐文章于 2025-01-28 15:05:02 发布 · 514 阅读

0 ·

CC 4.0 BY-SA版权

设计模式专栏收录该内容

21 篇文章

订阅专栏

本文展示如何使用C#中的继承和多态特性来创建一个包含多个子类和实例的复杂层级结构，并通过`Display`方法实现递归打印。此示例包括父类`FatherSubject`和子类`LeafSubject`，演示了如何在不同层次上添加和显示主体。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WCF_Binding
{
    //科目，抽象类
   public abstract class Subject
    {
        protected string name;

        public Subject(string name)
        {
            this.name = name;
        }
        public abstract void Display(int depth);    //显示
    }
    public class FatherSubject : Subject
    {
        List<Subject> subjectList = new List<Subject>();
        public FatherSubject(string name)
            : base(name)
        { 
        }
        public void Add(Subject subject)
        {
            subjectList.Add(subject);
        }
        public override void Display(int depth)
        {
            Console.WriteLine(new String('-', depth) + name);
            foreach (Subject item in subjectList)
            {
                item.Display(depth + 2);
            }
        }
    }
    public class LeafSubject : Subject
    {
        public LeafSubject(string name)
            : base(name)
        { 
        }
        public override void Display(int depth)
        {
            Console.WriteLine(new String('-', depth) + name);
        }
    }
    class CompositeTest
    {
        public static void MainTest(string[] args)
        {
            FatherSubject root = new FatherSubject("学科");
            FatherSubject artroot = new FatherSubject("文科");
            FatherSubject scienceroot = new FatherSubject("理科");
         
            artroot.Add(new LeafSubject("语文"));
            artroot.Add(new LeafSubject("英语"));
            FatherSubject sciencechild = new FatherSubject("数学");
            sciencechild.Add(new LeafSubject("基础数学"));
            sciencechild.Add(new LeafSubject("线性代数"));
            scienceroot.Add(sciencechild);
            scienceroot.Add(new LeafSubject("物理"));

            root.Add(artroot);
            root.Add(scienceroot);

            root.Display(0);

            Console.ReadKey();
        }
    }
}