Recursively display all files and folders in the target folder and calculate the size of the target folder.

A typical recursive application is to traverse the target folder, print or display all the files and folders in the folder, and recursively calculate the total size of the target folder.

  1:     class Program
  2:     {
  3:         static void Main(string[] args)
  4:         {
5: console. writeline ("Enter the target folder ");
  6:             string path = Console.ReadLine();
  7:             FindFoldersAndFiles(path);
  8:             Console.WriteLine("\r\n");
9: console. writeline ("total target folder size: {0} bytes", getdirectorylength (PATH ));
 10:             Console.ReadKey();
 11:         }
 12: 
13: // recursive all files and folders in the target folder
 14:         private static void FindFoldersAndFiles(string path)
 15:         {
16: console. writeline ("folder" + path );
17: // traverse all objects in the target folder
 18:             foreach (string fileName in Directory.GetFiles(path))
 19:             {
 20:                 Console.WriteLine("┣" + fileName);
 21:             }
 22: 
23: // traverse all the folders in the target folder
 24:             foreach (string directory in Directory.GetDirectories(path))
 25:             {
 26:                 FindFoldersAndFiles(directory);
 27:             }
 28:         }
 29: 
30: // recursively calculate the folder size
 31:         static long GetDirectoryLength(string path)
 32:         {
 33:             if (!Directory.Exists(path))
 34:             {
 35:                 return 0;
 36:             }
 37: 
 38:             long size = 0;
 39: 
40: // traverse all objects in the specified path
 41:             DirectoryInfo di = new DirectoryInfo(path);
 42:             foreach (FileInfo fi in di.GetFiles())
 43:             {
 44:                 size += fi.Length;
 45:             }
 46: 
47: // traverse all folders in the specified path
 48:             DirectoryInfo[] dis = di.GetDirectories();
 49:             if (dis.Length > 0)
 50:             {
 51:                 for (int i = 0; i < dis.Length; i++)
 52:                 {
 53:                     size += GetDirectoryLength(dis[i].FullName);
 54:                 }
 55:             }
 56: 
 57:             return size;
 58:         }
 59:     }
 60: 
 61: 

 

When traversing the target folder, recursively display all the folders and files in the target folder, and recursively calculate the total size of the target folder.