简单工厂和多态抽象类复习

实现模拟硬盘打开文件：

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace _129_复习_模拟硬盘打开文件
{
    class Program
    {
        static void Main(string[] args)
        {
            ////使用进程打开指定文件
            //ProcessStartInfo psi = new ProcessStartInfo(@"C:\Users\46124\Desktop\CSharpTestTwo.mp4");
            //Process p = new Process();
            //p.StartInfo = psi;
            //p.Start();
            Console.WriteLine("请选择要进入的磁盘：");
            string path = Console.ReadLine();  //D:
            Console.WriteLine("请选择要打开的文件：");
            string fileName = Console.ReadLine();  //\1.txt
            //文件的全路径：path+fileName
            FileFather ff = GetFile(fileName, path + fileName);
            ff.OpenFile();
            Console.ReadKey();
        }
        public static FileFather GetFile(string fileName, string fullPath)
        {
            string extension = Path.GetExtension(fileName);
            FileFather ff = null;
            switch (extension)
            {
                case ".txt":
                    ff = new TxtPath(fullPath);
                    break;
                case ".jpg":
                    ff = new JpgPath(fullPath);
                    break;
                case ".mp4":
                    ff = new Mp4Path(fullPath);
                    break;
            }
            return ff;
        }
    }
}

FileFather.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace _129_复习_模拟硬盘打开文件
{
    public abstract class FileFather
    {
        public string fullPath
        {
            get;
            set;
        }
        public FileFather(string fullPath)
        {
            this.fullPath = fullPath;
        }
        public abstract void OpenFile();
    }
}

TxtPath:

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace _129_复习_模拟硬盘打开文件
{
    class TxtPath : FileFather
    {
        public TxtPath(string fullPath) : base(fullPath)
        {
        }
        public override void OpenFile()
        {
            ProcessStartInfo psi = new ProcessStartInfo(this.fullPath);
            Process p = new Process();
            p.StartInfo = psi;
            p.Start();
        }
    }
}

JpgPath.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
namespace _129_复习_模拟硬盘打开文件
{
    class JpgPath : FileFather
    {
        public JpgPath(string fullPath) : base(fullPath)
        { }
        public override void OpenFile()
        {
            ProcessStartInfo psi = new ProcessStartInfo(this.fullPath);
            Process p = new Process();
            p.StartInfo = psi;
            p.Start();
        }
    }
}

Mp4Path.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;
namespace _129_复习_模拟硬盘打开文件
{
    class Mp4Path : FileFather
    {
        public Mp4Path(string fullPath) : base(fullPath)
        { }
        public override void OpenFile()
        {
            ProcessStartInfo psi = new ProcessStartInfo(this.fullPath);
            Process p = new Process();
            p.StartInfo = psi;
            p.Start();
        }
    }
}