#基础知识

 　　1、获得当前运行程序的路径

1 string rootPath = Directory.GetCurrentDirectory();

　　2、获得该文件夹下的文件，返回类型为FileInfo

1 string path=@"X:\XXX\XX";2 DirectoryInfo root = new DirectoryInfo(path);3 FileInfo[] files=root.GetFiles();

　　3、获得该文件夹下的子目录，返回类型为DirectoryInfo

1 string path=@"X:\XXX\XX";2 DirectoryInfo root = new DirectoryInfo(path);3 DirctoryInfo[] dics=root.GetDirectories();

　　4、获得文件夹名

1 string path=@"X:\XXX\XX";2 DirectoryInfo root = new DirectoryInfo(path);3 string dicName=root.Name;

　　5、获得文件夹完整的路径名

1 string path=@"X:\XXX\XX";2 DirectoryInfo root = new DirectoryInfo(path);3 string dicName=root.FullName;

　　6、获取文件的Name和FullName

1 string path=@"X:\XXX\XX";2 DirectoryInfo root = new DirectoryInfo(path);3 foreach (FileInfo f in root.GetFiles())4 {5 string name=f.Name;6 string fullName=f.FullName;7 } 

#只获取目录下一级的文件夹与文件

 1 String path = @"X:\xxx\xxx"; 2  3 //第一种方法 4 string[] files = Directory.GetFiles(path, "*.txt"); 5  6 foreach (string file in files) 7 { 8  Console.WriteLine(file); 9 }10 11 //第二种方法12 DirectoryInfo folder = new DirectoryInfo(path);13 14 foreach (FileInfo file in folder.GetFiles("*.txt"))15 {16  Console.WriteLine(file.FullName);17 }

# 递归地输出当前运行程序所在的磁盘下的所有文件名和子目录名

 1 static void Main(string[] args) 2  { 3 //获取当前程序所在的文件路径 4 String rootPath = Directory.GetCurrentDirectory(); 5 string parentPath = Directory.GetParent(rootPath).FullName;//上级目录 6 string topPath = Directory.GetParent(parentPath).FullName;//上上级目录 7 StreamWriter sw = null; 8 try 9  {10 //创建输出流，将得到文件名子目录名保存到txt中11 sw = new StreamWriter(new FileStream("fileList.txt", FileMode.Append));12 sw.WriteLine("根目录：" + topPath);13 getDirectory(sw, topPath, 2);14  }15 catch (IOException e)16  {17  Console.WriteLine(e.Message);18  }19 finally20  {21 if (sw != null)22  {23  sw.Close();24 Console.WriteLine("完成");25  }26  }27 28  }29 30 /// <summary>31 /// 获得指定路径下所有文件名32 /// </summary>33 /// <param name="sw">文件写入流</param>34 /// <param name="path">文件写入流</param>35 /// <param name="indent">输出时的缩进量</param>36 public static void getFileName(StreamWriter sw, string path, int indent)37  {38 DirectoryInfo root = new DirectoryInfo(path);39 foreach (FileInfo f in root.GetFiles())40  {41 for (int i = 0; i < indent; i++)42  {43 sw.Write(" ");44  }45  sw.WriteLine(f.Name);46  }47  }48 49 /// <summary>50 /// 获得指定路径下所有子目录名51 /// </summary>52 /// <param name="sw">文件写入流</param>53 /// <param name="path">文件夹路径</param>54 /// <param name="indent">输出时的缩进量</param>55 public static void getDirectory(StreamWriter sw, string path, int indent)56  {57  getFileName(sw, path, indent);58 DirectoryInfo root = new DirectoryInfo(path);59 foreach (DirectoryInfo d in root.GetDirectories())60  {61 for (int i = 0; i < indent; i++)62  {63 sw.Write(" ");64  }65 sw.WriteLine("文件夹：" + d.Name);66 getDirectory(sw, d.FullName, indent + 2);67  sw.WriteLine();68  }69 }

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