01进程

Process[] pro = Process.GetProcesses();

            Process.Start("notepad");
            Process.Start("mspaint");
            Process.Start("iexplore", "http://baidu.com");
            Process.Start("calc");
            Console.ReadKey();

            //封装我们要打开的文件的相关信息，但并不打开
            ProcessStartInfo psi = new ProcessStartInfo(@"C:\Users\andu\Desktop\a.txt");

            Process pro = new Process();
            //告诉进行去打开
            pro.StartInfo = psi;
            //这里的start(),是实例函数，非静态函数
            pro.Start();

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

namespace _01进程
{
    class Program
    {
        static void Main(string[] args)
        {
            //Process[] pro = Process.GetProcesses();
            //foreach (var item in pro)
            //{
            //    item.Kill();
            //    Console.WriteLine(item.ProcessName);
            //}

            //Process.Start("notepad");
            //Process.Start("mspaint");
            //Process.Start("iexplore", "http://baidu.com");
            //Process.Start("calc");

            ////封装我们要打开的文件的相关信息，但并不打开
            //ProcessStartInfo psi = new ProcessStartInfo(@"C:\Users\andu\Desktop\a.txt");

            //Process pro = new Process();
            ////告诉进行去打开
            //pro.StartInfo = psi;
            ////这里的start(),是实例函数，非静态函数
            //pro.Start();

            Console.WriteLine("请输入打开文件路径");
            string filePath = Console.ReadLine();
            Console.WriteLine("请输入文件名");
            string fileName = Console.ReadLine();

            //通过简单工厂设计模式返回父类


            BaseFile bf = GetFile(filePath, fileName);
            if (bf!=null)
            {
                bf.OpenFile();
            }


            Console.ReadKey();

        }

        static BaseFile GetFile(string filePath,string fileName)
        {
            BaseFile bf = null;
            string strExtension = Path.GetExtension(fileName); // 3.txt
            switch (strExtension)
            {
                case ".txt":bf = new TxtFile(filePath, fileName);
                    break;
                case ".avi":bf= new AviFile(filePath, fileName);
                    break;
                case ".mp4":bf = new Mp4File(filePath, fileName);
                    break;
                default:
                    break;
            }
            return bf;
        }

    }

    class BaseFile
    {
        //字段、属性、构造函数、函数、索引器
        private string _filePath; //封装属性快捷键 ctrl+r+e

        public string FilePath
        {
            get
            {
                return _filePath;
            }

            set
            {
                _filePath = value;
            }
        }

        //自动属性 快捷键 prop + 两下 tab
        //属性的本质：两个函数，get和set
        public string FileName { get; set; }

        public BaseFile(string filePath,string fileName)
        {
            this.FilePath = filePath;
            this.FileName = fileName;
        }

        //设计一个函数，打开指定文件
        public void OpenFile()
        {
            ProcessStartInfo psi = new ProcessStartInfo(this.FilePath + "\\" + this.FileName);
            Process pro = new Process();
            pro.StartInfo = psi;
            pro.Start();
        }

    }

    class TxtFile : BaseFile
    {
        //子类默认调用父类无参构造函数，父类有参构造函数替换了无参的构造函数
        public TxtFile(string filePath,string fileName) : base(filePath, fileName)
        {

        }


    }
    class Mp4File : BaseFile
    {
        public Mp4File(string filePath,string fileName) : base(filePath, fileName) { }
    }
    class AviFile :BaseFile
    {
        public AviFile(string filePath,string fileName) : base(filePath, fileName) { }
    }
}