Traversing Directories : Directory « File Stream « C# / C Sharp

1. C# / C Sharp
2. File Stream
3. Directory

Traversing Directories

     
/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson

Publisher: Apress  L.P.
ISBN: 1-893115-62-3
*/
// 32 - .NET Frameworks Overview\InputOutput\Traversing Directories
// copyright 2000 Eric Gunnerson
using System;
using System.IO;

class DirectoryWalker
{
    public delegate void ProcessDirCallback(DirectoryInfo dir, int level, object obj);
    public delegate void ProcessFileCallback(FileInfo file, int level, object obj);
    
    public DirectoryWalker(    ProcessDirCallback dirCallback,
    ProcessFileCallback fileCallback)
    {
        this.dirCallback = dirCallback;
        this.fileCallback = fileCallback;
    }
    
    public void Walk(string rootDir, object obj)
    {
        DoWalk(new DirectoryInfo(rootDir), 0, obj);
    }
    void DoWalk(DirectoryInfo dir, int level, object obj)
    {
        foreach (FileInfo f in dir.GetFiles())
        {
            if (fileCallback != null)
            fileCallback(f, level, obj);
        }
        foreach (DirectoryInfo d in dir.GetDirectories())
        {
            if (dirCallback != null)
            dirCallback(d, level, obj);
            DoWalk(d, level + 1, obj);
        }
    }
    
    ProcessDirCallback    dirCallback;
    ProcessFileCallback    fileCallback;
}

public class TraversingDirectories
{
    public static void PrintDir(DirectoryInfo d, int level, object obj)
    {
        WriteSpaces(level * 2);
        Console.WriteLine("Dir: {0}", d.FullName);
    }
    public static void PrintFile(FileInfo f, int level, object obj)
    {
        WriteSpaces(level * 2);
        Console.WriteLine("File: {0}", f.FullName);
    }
    public static void WriteSpaces(int spaces)
    {
        for (int i = 0; i < spaces; i++)
        Console.Write(" ");
        
    }
    public static void Main(string[] args)
    {
        DirectoryWalker dw = new DirectoryWalker(
        new DirectoryWalker.ProcessDirCallback(PrintDir),
        new DirectoryWalker.ProcessFileCallback(PrintFile));
        
        string root = ".";
        if (args.Length == 1)
        root = args[0];
        dw.Walk(root, "Passed string object");
    }
}

           
         
    
    
    
    
  

Related examples in the same category

1.	Find Files That Match a Wildcard Expression
2.	Get Files from a directory
3.	Get Directory properties from DirectionInfo class
4.	Get directory name and file information in that directory
5.	Directory Counter
6.	File Search
7.	Get Name, Parent, Exists properties from DirectoryInfo class
8.	Get Creation Time
9.	Get Last Write Time
10.	Get Last Access Time
11.	Calculate Directory Size
12.	Copy Directory
13.	Check the Existance of a Directory
14.	Get Current Directory
15.	Set Current Directory
16.	Directory Object
17.	illustrates recursive Directory use
18.	illustrates the Directory class
19.	illustrates the Directory class 2
20.	Uses the DirectoryInfo class to recursively show subdirectories
21.	Changes the current working directory and then lists the files in the directory
22.	Directory Tree Host
23.	Gets the size of all files within a directory
24.	Determine if the directory is empty, ie. no files and no sub-directories
25.	Get an array of files info from a directory.
26.	Removes a directory as best as it can. Errors are ignored.
27.	Directory Class xxposes static methods for creating, moving, and enumerating through directories and subdirectories.
28.	Calculates the size of a directory and its subdirectories, if any, and displays the total size in bytes.
29.	Gets the current working directory of the application.
30.	Directory Class
31.	Calculate the size of a directory and its subdirectories, if any, and displays the total size in bytes.
32.	Creates all directories and subdirectories in the specified path.
33.	Create new nested directories
34.	Deletes an empty directory from a specified path.
35.	Deletes the directory any subdirectories and files in the directory.
36.	Returns an enumerable collection of directory names in a specified path.
37.	Returns an enumerable collection of directory names that match a search pattern in a specified path.
38.	Get collection of directory names that match a search pattern, and optionally searches subdirectories.
39.	Returns an enumerable collection of file names in a specified path.
40.	Returns an enumerable collection of file names that match a search pattern in a specified path.
41.	Get a collection of file names that match a search pattern, and optionally searches subdirectories.
42.	Determines whether the given path refers to an existing directory on disk.
43.	Gets a DirectorySecurity object that encapsulates the access control list (ACL) entries
44.	Gets the creation date and time of a directory.
45.	Gets the creation date and time, in Coordinated Universal Time (UTC) format, of a directory.
46.	Gets the names of subdirectories in the specified directory.
47.	Gets an array of directories matching the specified search pattern from the current directory.
48.	Returns the volume information, root information, or both for the specified path.
49.	Returns the names of files that match the specified search pattern
50.	Returns the names of all files and subdirectories in the specified directory.
51.	Returns the date and time the specified file or directory was last accessed.
52.	Returns the date and time the specified file or directory was last written to.
53.	Sets the date and time the specified file or directory was last accessed.
54.	Sets the date and time a directory was last written to.
55.	Instance methods for creating, moving, and enumerating through directories and subdirectories.
56.	Copy directories with DirectoryInfo
57.	DriveInfo Class Provides access to information on a drive.
58.	Read and Write to a Newly Created Data File
59.	Read Text from a File
60.	File.OpenText returns a StreamReader
61.	Write Text to a File
62.	Copy,delete file and directory
63.	Find all files in a directory, and all files within every nested directory.
64.	Find all files in a directory, and all files within every nested directory. (2)
65.	Current Dir
66.	Directory Walker
67.	Create Directory
68.	Class, which describes folder with its subfolders.