using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace 模拟磁盘打开文件

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("请选择要进入的磁盘");

            string path = Console.ReadLine();

            Console.WriteLine("请选择要打开的文件");

            string fileName = Console.ReadLine();

            FileFarher ff = GetFile(fileName,path+fileName);//返回的是被之类重写的FileFarher

                ff.OpenFile();

            Console.ReadLine();

        }

        public static FileFarher GetFile(string filename,string fullpath)

        {

            string extension = Path.GetExtension(filename);

            FileFarher ff = null;

            switch (extension)

            {

                case ".txt":ff = new TxTPath(fullpath);

                    break;

                case ".jpg":ff = new JpgPath(fullpath);

                    break;

            }

            return ff;

        }

    }

    public abstract class FileFarher   //父类

    {

        public string fileName

        {

            get;

            set;

        }

        public FileFarher(string filename)

        {

            this.fileName = filename;

        }

    public abstract void OpenFile();

    }

    public class TxTPath : FileFarher  //继承父类

    {    public TxTPath(string filename) : base(filename)   //继承父类中的filename

        {

        }

        public override void OpenFile()

        {

            ProcessStartInfo pso = new ProcessStartInfo(this.fileName);

            Process p = new Process();

            p.StartInfo = pso;

            p.Start();

        }

    }

    public class JpgPath : FileFarher   //继承父类

    {

        public JpgPath(string filename) : base(filename) //继承父类中的filename

        {

        }

        public override void OpenFile()

        {

        }

    }

}