Filestream读写文件

Filestream读写文件

把1.pdf读到2.pdf

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace testConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            //打开源文件1.pdf,供读
            FileStream fs = new FileStream(@"Y:\1.pdf",FileMode.Open,FileAccess.Read);
            //新建目标文件2.pdf,供写
            FileStream fsw = new FileStream(@"Y:\2.pdf", FileMode.Create, FileAccess.Write);
            
            //读一个字节写一个字节
            //调用ReadByte方法一次读取一个字节
            //调用ReadByte方法一次写入一个字节
            //ReadByte();返回值为0到255int值,如果到文件尾了返回-1
            
            //int count = fs.ReadByte();
            //while (count!=-1)
            //{
            //    fsw.WriteByte((Byte)count);
            //    Console.Write(count);
            //    count = fs.ReadByte();
            //}

            //一次缓存“100”个字节,写“100”个字节
            //count返回缓存的字节数,如果为0,则到达文件尾
            Byte[] bytes = new Byte[100];
            int count=fs.Read(bytes, 0,100);
            while (count != 0)
            {
                fsw.Write(bytes, 0, count);
                Console.Write(count);
                count = fs.Read(bytes, 0, 100);
            }

            //关闭读写流
            fsw.Close();
            fs.Close();
        }
    }
}


 

原文地址:https://www.cnblogs.com/gitran/p/3644154.html