Csharp/C Sharp by API/System.IO/DirectoryInfo

DirectoryInfo.CreateSubdirectory

 
using System;
using System.IO;
public class MainClass
{
  static void Main(string[] args)
  {
    DirectoryInfo MyRoot = new DirectoryInfo(@"c:\projects");
        MyRoot.CreateSubdirectory("MyFolder");
  }
}

DirectoryInfo.CreationTime

 
using System;
using System.IO;
class MainClass
{
    public static void Main(string[] args)
    {
        FileInfo file = new FileInfo("c:\\test.txt");    
        // Display directory information.
        DirectoryInfo dir = file.Directory;
        if (dir.Exists)
        {
            Console.Write("Directory created: ");
            Console.WriteLine(dir.CreationTime.ToString());
            Console.Write("Directory last updated: ");
            Console.WriteLine(dir.LastWriteTime.ToString());
            Console.Write("Directory last accessed: ");
            Console.WriteLine(dir.LastAccessTime.ToString());
        }
    
    }
}

DirectoryInfo.Exists

  

using System;
using System.IO;
class MainClass {
    static void Main(string[] args) {
        FileInfo file = new FileInfo("c:\\a.txt");
        // Display directory information.
        DirectoryInfo dir = file.Directory;
        Console.WriteLine("Checking directory: " + dir.Name);
        Console.WriteLine("In directory: " + dir.Name);
        Console.Write("Directory exists: ");
        Console.WriteLine(dir.Exists.ToString());
        if (dir.Exists) {
            Console.Write("Directory created: ");
            Console.WriteLine(dir.CreationTime.ToString());
            Console.Write("Directory last updated: ");
            Console.WriteLine(dir.LastWriteTime.ToString());
            Console.Write("Directory last accessed: ");
            Console.WriteLine(dir.LastAccessTime.ToString());
            Console.Write("Directory attribute list: ");
            Console.WriteLine(dir.Attributes.ToString());
            Console.WriteLine("Directory contains: " +
               dir.GetFiles().Length.ToString() + " files");
        }
        Console.WriteLine();
    }
}

DirectoryInfo.FullName

 
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.IO.rupression;
using System.Text;
public class MainClass
{
    public static void Main()
    {
        DirectoryInfo root = new DirectoryInfo(@"C:\Program Files\");
        DirectoryInfo[] dirs = root.GetDirectories("*", SearchOption.TopDirectoryOnly);
        Console.WriteLine("{0} subdirectories:", root.FullName);
        foreach (DirectoryInfo subDir in dirs)
        {
            Console.WriteLine("    {0}", subDir.Name);
        }
    }
}

DirectoryInfo.GetDirectories()

  
using System;
using System.IO;
public class DirectoryCounter {
    public static void Main() {
        DirectoryInfo myDir = new DirectoryInfo(@"c:\Program Files");
        int total = CountDirectories(myDir);
        Console.WriteLine(total);
    }
    public static int CountDirectories(DirectoryInfo dir) {
        DirectoryInfo[] dirs = dir.GetDirectories();
        int count = dirs.Length;
        foreach (DirectoryInfo subDir in dirs) {
            count += CountDirectories(subDir);
        }
        return count;
    }
}

DirectoryInfo.GetFiles()

  
using System;
using System.IO;
public class FileSearch {
    public static void Main() {
        String searchName = "win";
        DirectoryInfo myDir = new DirectoryInfo(@"c:\Program Files");
        SearchDirectories(myDir, searchName);
    }
    public static void SearchDirectories(DirectoryInfo dir, String target) {
        FileInfo[] files = dir.GetFiles();
        foreach (FileInfo file in files) {
            if (file.Name.IndexOf(target) > -1) {
                Console.WriteLine(file.Name);
            }
        }
        DirectoryInfo[] dirs = dir.GetDirectories();
        foreach (DirectoryInfo subDir in dirs) {
            SearchDirectories(subDir, target);
        }
    }
}

DirectoryInfo.GetFiles(String filter)

  
using System;
using System.IO;
class MainClass {
    static void Main(string[] args) {
        DirectoryInfo dir = new DirectoryInfo("c:\\");
        FileInfo[] files = dir.GetFiles("c:\\a.txt");
        foreach (FileInfo file in files) {
            Console.Write("Name: " + file.Name + "  ");
            Console.WriteLine("Size: " + file.Length.ToString());
        }
    }
}

DirectoryInfo.LastAccessTime

  
using System;
using System.IO;
class MainClass {
    static void Main(string[] args) {
        FileInfo file = new FileInfo("c:\\a.txt");
        // Display directory information.
        DirectoryInfo dir = file.Directory;
        Console.WriteLine("Checking directory: " + dir.Name);
        Console.WriteLine("In directory: " + dir.Name);
        Console.Write("Directory exists: ");
        Console.WriteLine(dir.Exists.ToString());
        if (dir.Exists) {
            Console.Write("Directory last accessed: ");
            Console.WriteLine(dir.LastAccessTime.ToString());
        }
        Console.WriteLine();
    }
}

DirectoryInfo.LastWriteTime

  
using System;
using System.IO;
class MainClass {
    static void Main(string[] args) {
        FileInfo file = new FileInfo("c:\\a.txt");
        // Display directory information.
        DirectoryInfo dir = file.Directory;
        Console.WriteLine("Checking directory: " + dir.Name);
        Console.WriteLine("In directory: " + dir.Name);
        Console.Write("Directory exists: ");
        Console.WriteLine(dir.Exists.ToString());
        if (dir.Exists) {
            Console.Write("Directory last updated: ");
            Console.WriteLine(dir.LastWriteTime.ToString());
        }
        Console.WriteLine();
    }
}

DirectoryInfo.Name

  
using System;
using System.IO;
class MainClass {
    static void Main(string[] args) {
        FileInfo file = new FileInfo("c:\\a.txt");
        // Display directory information.
        DirectoryInfo dir = file.Directory;
        Console.WriteLine("Checking directory: " + dir.Name);
        Console.WriteLine("In directory: " + dir.Name);
        Console.Write("Directory exists: ");
        Console.WriteLine(dir.Exists.ToString());
        if (dir.Exists) {
            Console.Write("Directory attribute list: ");
            Console.WriteLine(dir.Attributes.ToString());
        }
        Console.WriteLine();
    }
}

DirectoryInfo.Parent

 
using System;
using System.IO;
class MainClass
{
    public static void Main(string[] args)
    {
        FileInfo file = new FileInfo("c:\\test.txt");
        // Display directory information.
        DirectoryInfo dir = file.Directory;
        Console.WriteLine("Checking directory: " + dir.Name);
        Console.WriteLine("In directory: " + dir.Parent.Name);
        Console.Write("Directory exists: ");
        Console.WriteLine(dir.Exists.ToString());
    }
}

new DirectoryInfo(String path)

  
using System;
using System.IO;
public class WildcardTest {
    private static void Main(string[] args) {
        DirectoryInfo dir = new DirectoryInfo("c:\\");
        FileInfo[] files = dir.GetFiles("*");
            
        foreach (FileInfo file in files) {
            Console.Write("Name: " + file.Name + "  ");
            Console.WriteLine("Size: " + file.Length.ToString());
        }
    }
}