C#.net 用 StreamReader 和 StreamWriter 读写文件

来源：互联网发布：上海注册公司知乎编辑：程序博客网时间：2024/04/30 01:03

using System;
using System.IO;
using System.Text;

namespace FileTest
{
class FileTest
{
  static void Main(string[] args)
  {
   StreamReader myStreamReader;
   StreamWriter myStreamWriter;
   string sourceFileName = "F://source.txt"; //要读取的文件
   string targetFileName = "F://target.txt"; //要写入的文件

   try
   {
    File.Exists(sourceFileName); //源文件是否存在
   }
   catch(Exception e)
   {
    Console.WriteLine("Source File not existes ! {0}", e);
    Console.ReadLine();
    return;
   }

   try
   {
    myStreamReader = File.OpenText(sourceFileName); //打开源文件
   }
   catch(Exception e)
   {
    Console.WriteLine("File open failed : {0}", e);
    Console.ReadLine();
    return;
   }

   myStreamWriter = new StreamWriter(targetFileName, true); //实例化指向目标文件
   while(myStreamReader.Peek() != -1)
   {
    string myStr = myStreamReader.ReadLine(); //读去源文件
    myStreamWriter.WriteLine(myStr); //写入目标文件
   }

myStreamReader.Close();
myStreamWriter.Close();

   Console.WriteLine("Succesfully !");
   Console.ReadLine();
  }
}
}