using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using Microsoft.Win32;
public class RegistryTreeClass: TreeView
{
public RegistryTreeClass()
{
ImageList = new ImageList();
ImageList.Images.Add(new Bitmap(GetType(), "CLOSED.BMP"));
ImageList.Images.Add(new Bitmap(GetType(), "OPEN.BMP"));
RootNodes();
}
protected override void OnBeforeExpand(TreeViewCancelEventArgs e)
{
base.OnBeforeExpand(e);
BeginUpdate();
foreach (TreeNode tn in e.Node.Nodes)
{
AddBranch(tn);
}
EndUpdate();
}
public void RootNodes()
{
BeginUpdate();
TreeNode tnHKCR = new TreeNode("HKEY_CLASSES_ROOT",0,1);
Nodes.Add(tnHKCR);
AddBranch(tnHKCR);
TreeNode tnHKCU = new TreeNode("HKEY_CURRENT_USER",0,1);
Nodes.Add(tnHKCU);
AddBranch(tnHKCU);
TreeNode tnHKLM = new TreeNode("HKEY_LOCAL_MACHINE",0,1);
Nodes.Add(tnHKLM);
AddBranch(tnHKLM);
TreeNode tnHKU = new TreeNode("HKEY_USERS",0,1);
Nodes.Add(tnHKU);
AddBranch(tnHKU);
SelectedNode = tnHKLM;
EndUpdate();
}
public void AddBranch(TreeNode tn)
{
if (tn.Nodes.Count > 0) return;
string strRegistryPath = tn.FullPath;
RegistryKey regBranch = null;
if (strRegistryPath.StartsWith("HKEY_CLASSES_ROOT"))
regBranch = Registry.ClassesRoot;
else if (strRegistryPath.StartsWith("HKEY_CURRENT_USER"))
regBranch = Registry.CurrentUser;
else if (strRegistryPath.StartsWith("HKEY_LOCAL_MACHINE"))
regBranch = Registry.LocalMachine;
else if (strRegistryPath.StartsWith("HKEY_USERS"))
regBranch = Registry.Users;
RegistryKey regSubKey = null;
try
{
if (null != tn.Parent)
{
// We need the path minus the top level tree.
int nPosPathSeparator = strRegistryPath.IndexOf(this.PathSeparator);
string strSubkey = strRegistryPath.Substring(nPosPathSeparator+1);
regSubKey = regBranch.OpenSubKey(strSubkey);
}
else
regSubKey = regBranch;
}
catch
{
return;
}
string[] astrSubkeyNames = regSubKey.GetSubKeyNames();
for (int i=0; i < astrSubkeyNames.Length; i++)
{
TreeNode tnBranch = new TreeNode(astrSubkeyNames[i],0,1);
tn.Nodes.Add(tnBranch);
}
}
}
public class MainForm : System.Windows.Forms.Form
{
private RegistryTreeClass rtvRegistry;
public MainForm()
{
InitializeComponent();
this.rtvRegistry = new RegistryTreeClass();
this.SuspendLayout();
this.rtvRegistry.Dock = System.Windows.Forms.DockStyle.Fill;
this.rtvRegistry.ImageIndex = -1;
this.rtvRegistry.Name = "rtvRegistry";
this.rtvRegistry.SelectedImageIndex = -1;
this.rtvRegistry.Size = new System.Drawing.Size(292, 273);
this.rtvRegistry.TabIndex = 0;
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.rtvRegistry});
this.ResumeLayout(false);
}
private void InitializeComponent()
{
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(292, 273);
this.Name = "MainForm";
this.Text = "Registry with class";
this.Load += new System.EventHandler(this.Form1_Load);
}
static void Main()
{
Application.Run(new MainForm());
}
private void Form1_Load(object sender, System.EventArgs e)
{
}
}