文件流的讀?。?br> //三個參數(shù)，第一個是路徑，第二個是打開文件的方式，第三個是對文件數(shù)據(jù)的操作
FileStream fileread = new FileStream (@"C:\Users\CH\Desktop\111.txt" , FileMode . Open, FileAccess . Read);
byte [] bytes = new byte [1024 * 1024 ];//字節(jié)數(shù)組，通過字節(jié)數(shù)組限制每次讀取多少數(shù)據(jù)
int r = fileread .Read(bytes, 0 , bytes. Length);//參數(shù)：字節(jié)數(shù)組，從0位置開始讀，每次讀bytes.Length長度
string str = Encoding. Default .GetString(bytes, 0 , r);//轉(zhuǎn)換編碼為字符串
fileread . Close();//刪除流
fileread . Dispose();//釋放流
Console .WriteLine(str);
Console .ReadKey();

文件的寫入：
可以用using來省去Close();Dispose();這兩個方法的調(diào)用;
using(FileStream filew = new FileStream (@"新建文本文檔.txt" , FileMode. OpenOrCreate, FileAccess . Write))
{

        string str = "天是晴朗的天" ;
        byte [] buffer = Encoding. Default .GetBytes(str);
        filew . Write(buffer, 0 , buffer .Length);
        filew . Close();
        filew . Dispose();
        Console .WriteLine( "OK" );
        Console .ReadKey();

}

StreamReader與StreamWrite：針對字符串的讀寫

using ( StreamReader rd = new StreamReader ( @"C:\Users\CH\Desktop\111.txt" ,Encoding . Default))

while (!rd.EndOfStream)
            {
                Console.WriteLine(rd.ReadLine());
            }
        Console .ReadKey();