【C#】C#获取文件夹下的所有文件

2019/06/17 16:16
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正文

 #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

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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 } 
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#只获取目录下一级的文件夹与文件

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 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 }
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# 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

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 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 finally 20  { 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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