Enumerating File System Directories

In this blog we will learn how to display the File System Directories in TreeView and display the Files in the Directory selected.

Screenshot



Snippet

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace WindowsExplorer
{
public partial class Form1 : Form
{
TreeNode ParentNode;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
treeView1.ImageList = imageList1;
foreach (DriveInfo driveInfo in DriveInfo.GetDrives())
{
if (driveInfo.IsReady)
{
ParentNode = treeView1.Nodes.Add(driveInfo.Name);
ParentNode.ImageIndex = 0;
LoadDirectories(ParentNode, driveInfo.Name);
}
}
treeView1.ExpandAll();
}
private void LoadDirectories(TreeNode parentNode, string Path)
{
TreeNode childNode;
DirectoryInfo dir = new DirectoryInfo(Path);
foreach (DirectoryInfo di in dir.GetDirectories())
{
childNode = parentNode.Nodes.Add(di.Name);
childNode.ImageIndex = 1;
}
}
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
try
{
if (e.Action == TreeViewAction.ByMouse)
{
DirectoryInfo dir = new DirectoryInfo(treeView1.SelectedNode.FullPath);
listView1.Items.Clear();
foreach (FileInfo files in dir.GetFiles())
{
ListViewItem item = new ListViewItem(files.Name);
item.ImageIndex = 2;
this.listView1.Items.Add(item);
}
}
}
catch (UnauthorizedAccessException Uex)
{
MessageBox.Show(Uex.Message);
}
catch (System.IO.IOException ex)
{
MessageBox.Show(ex.Message);
}
}
}
}