使用FileStream来读取数据

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using System;using System.Collections.Generic;using System.IO;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApplication2{    class Program    {        static void Main(string[] args)        {            //List泛型和 字符数组转换            //char[] chs = new char[] { 'c', 'c', 'a' };            //List<char> listChar = chs.ToList();            //for (int i = 0; i < listChar.Count; i++)            //{            //    Console.WriteLine(listChar[i]);            //}            //使用FileStream来读取数据            FileStream fsRead = new FileStream(@"D:\教程\buffer.txt",FileMode.OpenOrCreate,FileAccess.Read);            byte[] buffer = new byte[1024 * 1024 * 5];//规定缓冲区大小            int r = fsRead.Read(buffer, 0, buffer.Length);//返回本次实际读取的有效字节数            //string s = Encoding.Default.GetString(buffer, 0, r);//将字节数组中的元素编码转换成字符串            string s = Encoding.UTF8.GetString(buffer, 0, r);//将字节数组中的元素编码转换成字符串            fsRead.Close();//关闭流            fsRead.Dispose();//释放流占用的资源            Console.WriteLine(s);            Console.ReadKey();            //using语句自动用Close()和Dispose();释放资源，使用FileStream来写入数据            //using (FileStream fsWrite = new FileStream(@"D:\教程\buffer.txt",FileMode.OpenOrCreate,FileAccess.Write))            //{            //    string str = "看我有没有把你覆盖掉";            //    byte[] buffer = Encoding.Default.GetBytes(str);            //    fsWrite.Write(buffer,0,buffer.Length);            //}            //Console.WriteLine("写入完成");            //Console.ReadKey();        }    }}
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