using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            FillDirectoryTree(tvmTree);
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        private void FillDirectoryTree(TreeView tvm)
        {
            tvm.Nodes.Clear();
            string[] strDriver = Environment.GetLogicalDrives();
            foreach (string rootDirectoryName in strDriver)
            {
                if (rootDirectoryName != @"D:\")
                    continue;
                try
                {
                    DirectoryInfo dir = new DirectoryInfo(rootDirectoryName);
                    dir.GetDirectories();
                    TreeNode ndRoot = new TreeNode(rootDirectoryName);
                    tvm.Nodes.Add(ndRoot);
                    GetSubDirectoryNodes(ndRoot,ndRoot.Text);

                }
                catch (Exception ce)
                {
                    MessageBox.Show(ce.ToString());
                }
            }
        }
        private void GetSubDirectoryNodes(TreeNode parentNode, string fullName)
        {
            DirectoryInfo dir = new DirectoryInfo(fullName);
            DirectoryInfo[] dirSubs  = dir.GetDirectories();
            foreach(DirectoryInfo dirSub in dirSubs)
            {
                if((dirSub.Attributes & FileAttributes.Hidden)!=0)
                {
                    continue;
                }
                TreeNode subNode = new TreeNode(dirSub.Name);
                parentNode.Nodes.Add(subNode);
                this.GetSubDirectoryNodes(subNode,dirSub.FullName);
            }
        }

        private void tvmTree_AfterSelect(object sender, TreeViewEventArgs e)
        {
            lvwList.Items.Clear();
            String path = e.Node.FullPath;
            DirectoryInfo dir = new DirectoryInfo(path);
            path = path.Remove(2, 1);
            txtPath.Text = path;
            FileInfo[] files = dir.GetFiles();
            for (int i = 0; i < files.Length; i++)
            {
               \\adding items to object of listview
                lvwList.Items.Add(files[i].Name);
            }
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}