class1.cs

C#开发教程 由浅入深 配有实例 是初学者的好帮手

using System;
using System.IO;

namespace FileFileInfo
{
    class FileFileInfoApp
    {
        [STAThread]
        static void Main(string[] args)
        {
            // using FileInfo
//          Stream s = 
//              new FileStream("Bar.txt", FileMode.Create);
            FileInfo f = new FileInfo("Bar.txt");
            FileStream fs = f.Create();

            StreamWriter w = new StreamWriter(fs);
            w.Write("Hello World");
            w.Close();

//          s = new FileStream("Bar.txt", FileMode.Open);
            fs = f.Open(FileMode.Open, 
                FileAccess.Read, FileShare.None);
            StreamReader r = new StreamReader(fs);
            string t;
            while ((t = r.ReadLine()) != null)
            {
                Console.WriteLine(t);
            }
            w.Close();
            fs.Close();
            f.Delete();

            // using File
            Console.WriteLine();
            FileInfo f2 = new FileInfo("Bar.txt");
            FileStream fs2 = File.Create("Bar.txt");

            StreamWriter w2 = new StreamWriter(fs2);
            w2.Write("Goodbye Mars");
            w2.Close();

            fs2 = File.Open("Bar.txt", FileMode.Open, 
                FileAccess.Read, FileShare.None);
            StreamReader r2 = new StreamReader(fs2);
            while ((t = r2.ReadLine()) != null)
            {
                Console.WriteLine(t);
            }
            w2.Close();
            fs2.Close();
            f2.Delete();

            // using FileInfo.Create/OpenText
            Console.WriteLine();
            FileInfo f3 = new FileInfo("Bar.txt");
            StreamWriter w3 = f3.CreateText();
            w3.Write("Farewell Pluto");
            w3.Close();

            StreamReader r3 = f3.OpenText();
            while ((t = r3.ReadLine()) != null)
            {
                Console.WriteLine(t);
            }
            w3.Close();
        }
    }
}