c#之文件操作

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Text;
  4 using System.IO;
  5 
  6 /// <summary>
  7 /// [功能描述:
  8 /// 1、使用 I/O 类列出某一目录下的所有文件名，并输出到标准控制台
  9 /// 2、读文本文件(逐行)，并输出到标准控制台
 10 /// 3、新建一个文件并向文件中写入字符串
 11 /// ]<br></br>
 12 /// [创 建 者: XXX]<br></br>
 13 /// [创建时间: 2017-08-28]<br></br>
 14 /// <修改记录 
 15 ///        修改人=‘‘ 
 16 ///        修改时间=‘yyyy-mm-dd‘ 
 17 ///        修改目的=‘‘
 18 ///        修改描述=‘‘
 19 ///  />
 20 /// </summary>
 21 namespace ConsoleApplication1
 22 {
 23     class File
 24     {
 25         public File()
 26         {
 27             Console.Write("请输入目录路路径：");
 28             string path = Console.ReadLine();
 29             ReadFileName(path);
 30             Console.WriteLine();
 31             Console.Write("请输入要读取的文件(默认为路径为上面的路径)：");
 32             path += "\\";
 33             string path1 = path + Console.ReadLine();
 34             ReadFileToConsole(path1);
 35             Console.WriteLine();
 36             Console.Write("请输入要写入的文件(默认为路径和内容分别为上面的路径和内容)：");
 37             string path2 = path + Console.ReadLine();
 38             WriteFile(path1, path2);
 39         }
 40 
 41         /// <summary>
 42         /// 说明：读取本地文件名
 43         /// </summary>
 44         /// <param name="path">目录路径</param>
 45         /// <returns></returns>
 46         /// <remarks>2017-08-28</remarks>
 47         private void ReadFileName(string path)
 48         {
 49             DirectoryInfo dir = new DirectoryInfo(path);
 50             FileInfo[] inf = dir.GetFiles();
 51             foreach (FileInfo finf in inf)
 52             {
 53                 Console.WriteLine(finf);
 54             }
 55         }
 56 
 57         /// <summary>
 58         /// 说明：读取本地文件内容到控制台
 59         /// </summary>
 60         /// <param name="path">文件路径</param>
 61         /// <returns></returns>
 62         /// <remarks>2017-08-28</remarks>
 63         private void ReadFileToConsole(string path)
 64         {
 65             StreamReader sr = new StreamReader(path, Encoding.Default);
 66             String line = null;
 67             while ((line = sr.ReadLine()) != null)
 68             {
 69                 Console.WriteLine(line.ToString());
 70             }
 71 
 72             //关闭流
 73             sr.Close();
 74         }
 75 
 76         /// <summary>
 77         /// 说明：读取本地文件内容写到另一文件中
 78         /// </summary>
 79         /// <param name="path">文件路径</param>
 80         /// <returns></returns>
 81         /// <remarks>2017-08-28</remarks>
 82         private void WriteFile(string path1, string path2)
 83         {
 84             StreamReader sr = new StreamReader(path1, Encoding.Default);
 85             FileStream fs = new FileStream(path2, FileMode.Create);
 86             StreamWriter sw = new StreamWriter(fs);
 87             String line = null;
 88             while ((line = sr.ReadLine()) != null)
 89             {
 90                 sw.Write(line.ToString());
 91             }
 92 
 93             //清空缓冲区
 94             sw.Flush();
 95 
 96             //关闭流
 97             sw.Close();
 98             sr.Close();
 99             fs.Close();
100         }
101     }
102 }