本文主要向大家介绍了分享一个C#编程 组合模式的简单例子，通过具体的内容向大家展示，希望对大家学习C#编程有所帮助。

using System; 

using System.Collections.Generic; 

using System.Linq; 

using System.Text; 

using System.Threading.Tasks; 

namespace 组合模式 

{ 

    public abstract class FileObject 

    { 

        public string Name; 

        public List<FileObject> filelist = new List<FileObject>(); 

        public FileObject(string name) 

        { 

            this.Name = name; 

        } 

        //打印文件名 

        public abstract void PrintName(); 

        public abstract void Add(FileObject fileobject); 

        public abstract void Remove(FileObject fileobject); 

    } 

    public class txtFile:FileObject 

    { 

        public txtFile(string name) 

            : base(name) 

        { } 

        public override void PrintName() 

        { 

            Console.WriteLine("文件名：" + base.Name);  

        } 

        public override void Add(FileObject fileobject) 

        { 

            Console.WriteLine("不能向txt文件添加文件！"); 

        } 

        public override void Remove(FileObject fileobject) 

        { 

            Console.WriteLine("不能删除txt文件中的文件！"); 

        } 

    } 

    public class docFile:FileObject 

    { 

        public docFile(string name):base(name) 

        { } 

        public override void PrintName() 

        { 

            Console.WriteLine("文件名：" + base.Name);  

        } 

        public override void Add(FileObject fileobject) 

        { 

            Console.WriteLine("不能向doc文件添加文件！"); 

        } 

        public override void Remove(FileObject fileobject) 

        { 

            Console.WriteLine("不能删除doc文件中的文件！"); 

        } 

    } 

    public class Folder:FileObject 

    { 

        public Folder(string name):base(name) 

        { } 

        public override void Add(FileObject fileobject) 

        { 

            filelist.Add(fileobject); 

            Console.WriteLine(base.Name + "中添加了" + fileobject.Name); 

        } 

        public override void Remove(FileObject fileobject) 

        { 

            if (filelist.Remove(fileobject)) 

            { 

                Console.WriteLine(base.Name + "中删除了" + fileobject.Name); 

            } 

            else 

            { 

                Console.WriteLine("删除失败！"); 

            } 

        } 

        public override void PrintName() 

        { 

            Console.WriteLine("文件名：" + base.Name);  

        } 

    } 

    class Program 

    { 

        static void Main(string[] args) 

        { 

            FileObject txt1 = new txtFile("txt1"); 

            FileObject txt2 = new txtFile("txt2"); 

            FileObject doc1 = new docFile("doc1"); 

            FileObject doc2 = new docFile("doc2"); 

            FileObject folder1 = new Folder("folder1"); 

            FileObject folder2 = new Folder("folder2"); 

            txt1.Add(txt2); 

            doc1.Add(doc2); 

            txt1.Remove(doc1); 

            folder1.Add(txt1); 

            folder1.Add(doc2); 

            folder2.Add(folder1); 

            folder2.Add(doc1); 

            folder1.Remove(txt1); 

            //打印folder1目录下的文件 

            Console.WriteLine("-------------"); 

            foreach (FileObject file in folder1.filelist) 

            { 

                Console.WriteLine(file.Name); 

            } 

            //打印folder2目录下的文件 

            Console.WriteLine("-------------"); 

            foreach (FileObject file in folder2.filelist) 

            { 

                Console.WriteLine(file.Name); 

            } 

            Console.ReadKey(); 

        } 

    } 

}

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