TreeView Structure

Question

Hi, I want to show the directory structure in a treeview manner, how to do that. eg: -Desktop + My Documents -My Computer - Local Disk(C:) please advice regards, bjb

Kirtan Patel · Answer

Friend , Open FileExplorer.cs and Comment Out Following lines in it Rerun the project you will get what you want :) Dont Forget to Mark " Do you Like Answer " please it will give me some credits :) .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: Consolas, "Courier New", Courier, Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } //Fill files //foreach (FileInfo file in rootDir.GetFiles()) //{ // TreeNode node = new TreeNode(); // node.Text = file.Name; // node.ImageIndex = 2; // node.SelectedImageIndex = 2; // parentNode.Nodes.Add(node); //}

b b · Answer

Hello Kirtan, thanks for the help, your code is working perfectly. But, i just want to know, now i am getting all the folders and files under the root node. Is there any way we can show only the folders and not the files under the root node...? I just want to show only the folders and not the files under each node of the tree. thanks and regards, b

Kirtan Patel · Answer

Hi , Please mark " Do you like answer " it will give me some credits Download this Class File From Below Link Add it in Your Project and http://www.mediafire.com/?wqvi21mjlww Use it like Below Code by by creating its instance .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: Consolas, "Courier New", Courier, Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } FileExplorer fe = new FileExplorer(); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: Consolas, "Courier New", Courier, Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } private void treeView1_BeforeExpand( object sender, TreeViewCancelEventArgs e) { if (e.Node.Nodes[0].Text == "" ) { TreeNode node = fe.EnumerateDirectory(e.Node); } } private void Form1_Load( object sender, EventArgs e) { fe.CreateTree( this .treeView1); }

b b · Answer

Hello, First application is actuaaly working, but i want to show Desktop as a root node and all the folders, sub-folders in the system as child node. please help regards, b

Roei Bar · Answer

here is a full source including filesystem Iteration starting from starting location you specify public class FileSystemTreeView : TreeView { private bool _showFiles = true; private ImageList _imageList = new ImageList(); private Hashtable _systemIcons = new Hashtable(); public static readonly int Folder = 0; public FileSystemTreeView() { this.ImageList = _imageList; this.MouseDown += new MouseEventHandler(FileSystemTreeView_MouseDown); this.BeforeExpand += new TreeViewCancelEventHandler(FileSystemTreeView_BeforeExpand); } void FileSystemTreeView_MouseDown(object sender, MouseEventArgs e) { TreeNode node = this.GetNodeAt(e.X, e.Y); if (node == null) return; this.SelectedNode = node; //select the node under the mouse } void FileSystemTreeView_BeforeExpand(object sender, TreeViewCancelEventArgs e) { if( e.Node is FileNode ) return; DirectoryNode node = (DirectoryNode)e.Node; if (!node.Loaded) { node.Nodes[0].Remove(); //remove the fake child node used for virtualization node.LoadDirectory(); if( this._showFiles == true ) node.LoadFiles(); } } public void Load( string directoryPath ) { if( Directory.Exists( directoryPath ) == false ) throw new DirectoryNotFoundException( "Directory Not Found" ); _systemIcons.Clear(); _imageList.Images.Clear(); Nodes.Clear(); Icon folderIcon = new Icon( typeof( FileSystemTreeView ), "icons.folder.ico"); _imageList.Images.Add( folderIcon ); _systemIcons.Add( FileSystemTreeView.Folder, 0 ); DirectoryNode node = new DirectoryNode( this, new DirectoryInfo( directoryPath ) ); node.Expand(); } public int GetIconImageIndex( string path ) { string extension = Path.GetExtension( path ); if( _systemIcons.ContainsKey( extension ) == false ) { Icon icon = ShellIcon.GetSmallIcon( path ); _imageList.Images.Add( icon ); _systemIcons.Add( extension, _imageList.Images.Count-1 ); } return (int)_systemIcons[ Path.GetExtension( path )]; } public bool ShowFiles { get{ return this._showFiles; } set{ this._showFiles = value; } } } public class DirectoryNode : TreeNode { private DirectoryInfo _directoryInfo; public DirectoryNode( DirectoryNode parent, DirectoryInfo directoryInfo ) : base( directoryInfo.Name ) { this._directoryInfo = directoryInfo; this.ImageIndex = FileSystemTreeView.Folder; this.SelectedImageIndex = this.ImageIndex; parent.Nodes.Add( this ); Virtualize(); } public DirectoryNode( FileSystemTreeView treeView, DirectoryInfo directoryInfo ) : base( directoryInfo.Name ) { this._directoryInfo = directoryInfo; this.ImageIndex = FileSystemTreeView.Folder; this.SelectedImageIndex = this.ImageIndex; treeView.Nodes.Add( this ); Virtualize(); } void Virtualize() { int fileCount = 0; try { if( this.TreeView.ShowFiles == true ) fileCount = this._directoryInfo.GetFiles().Length; if( (fileCount + this._directoryInfo.GetDirectories().Length) > 0 ) new FakeChildNode( this ); } catch { } } public void LoadDirectory() { foreach( DirectoryInfo directoryInfo in _directoryInfo.GetDirectories() ) { new DirectoryNode( this, directoryInfo ); } } public void LoadFiles() { foreach( FileInfo file in _directoryInfo.GetFiles() ) { new FileNode( this, file ); } } public bool Loaded { get { if( this.Nodes.Count != 0 ) { if( this.Nodes[0] is FakeChildNode ) return false; } return true; } } public new FileSystemTreeView TreeView { get{ return (FileSystemTreeView)base.TreeView; } } } public class FileNode : TreeNode { private FileInfo _fileInfo; private DirectoryNode _directoryNode; public FileNode( DirectoryNode directoryNode, FileInfo fileInfo ) : base( fileInfo.Name ) { this._directoryNode = directoryNode; this._fileInfo = fileInfo; this.ImageIndex = ((FileSystemTreeView)_directoryNode.TreeView).GetIconImageIndex( _fileInfo.FullName ); this.SelectedImageIndex = this.ImageIndex; _directoryNode.Nodes.Add( this ); } } public class FakeChildNode : TreeNode { public FakeChildNode( TreeNode parent ) : base() { parent.Nodes.Add( this ); } } here is the form public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Panel panel1; private System.Windows.Forms.TextBox txtDirectory; private System.Windows.Forms.Label label1; private System.Windows.Forms.Button btnDirectory; private C2C.FileSystem.FileSystemTreeView tree; private System.Windows.Forms.Panel treePanel; /// /// Required designer variable. /// private System.ComponentModel.Container components = null; public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// /// Clean up any resources being used. /// protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// private void InitializeComponent() { this.panel1 = new System.Windows.Forms.Panel(); this.btnDirectory = new System.Windows.Forms.Button(); this.label1 = new System.Windows.Forms.Label(); this.txtDirectory = new System.Windows.Forms.TextBox(); this.treePanel = new System.Windows.Forms.Panel(); this.panel1.SuspendLayout(); this.SuspendLayout(); // // panel1 // this.panel1.Controls.Add(this.btnDirectory); this.panel1.Controls.Add(this.label1); this.panel1.Controls.Add(this.txtDirectory); this.panel1.Dock = System.Windows.Forms.DockStyle.Top; this.panel1.Location = new System.Drawing.Point(0, 0); this.panel1.Name = "panel1"; this.panel1.Size = new System.Drawing.Size(721, 57); this.panel1.TabIndex = 0; // // btnDirectory // this.btnDirectory.Location = new System.Drawing.Point(615, 27); this.btnDirectory.Name = "btnDirectory"; this.btnDirectory.Size = new System.Drawing.Size(30, 21); this.btnDirectory.TabIndex = 2; this.btnDirectory.Text = "..."; this.btnDirectory.Click += new System.EventHandler(this.btnDirectory_Click); // // label1 // this.label1.Location = new System.Drawing.Point(9, 9); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(102, 18); this.label1.TabIndex = 1; this.label1.Text = "Directory:"; // // txtDirectory // this.txtDirectory.Location = new System.Drawing.Point(9, 27); this.txtDirectory.Name = "txtDirectory"; this.txtDirectory.Size = new System.Drawing.Size(603, 20); this.txtDirectory.TabIndex = 0; this.txtDirectory.Text = ""; this.txtDirectory.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txtDirectory_KeyDown); this.txtDirectory.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtDirectory_KeyPress); // // treePanel // this.treePanel.Dock = System.Windows.Forms.DockStyle.Fill; this.treePanel.Location = new System.Drawing.Point(0, 57); this.treePanel.Name = "treePanel"; this.treePanel.Size = new System.Drawing.Size(721, 530); this.treePanel.TabIndex = 1; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(721, 587); this.Controls.Add(this.treePanel); this.Controls.Add(this.panel1); this.Name = "Form1"; this.Text = "Demo Application"; this.Load += new System.EventHandler(this.Form1_Load); this.panel1.ResumeLayout(false); this.ResumeLayout(false); } #endregion /// /// The main entry point for the application. /// [STAThread] static void Main() { Application.Run(new Form1()); } private void Form1_Load(object sender, System.EventArgs e) { tree = new C2C.FileSystem.FileSystemTreeView(); treePanel.Controls.Add( tree ); tree.Dock = DockStyle.Fill; //tree.ShowFiles = false; } private void btnDirectory_Click(object sender, System.EventArgs e) { FolderBrowserDialog dlg = new FolderBrowserDialog(); if( dlg.ShowDialog() == DialogResult.OK ) { txtDirectory.Text = dlg.SelectedPath; tree.Load( txtDirectory.Text ); } } private void txtDirectory_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { } private void txtDirectory_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { if( e.KeyData == Keys.Enter ) { if( System.IO.Directory.Exists( txtDirectory.Text ) == false ) { MessageBox.Show( "Directory Does Not Exist", "Invalid Directory", MessageBoxButtons.OK, MessageBoxIcon.Information ); return; } tree.Load( txtDirectory.Text ); } } } and the ShellIcon Toolkit public class ShellIcon { [StructLayout(LayoutKind.Sequential)] public struct SHFILEINFO { public IntPtr hIcon; public IntPtr iIcon; public uint dwAttributes; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)] public string szDisplayName; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 80)] public string szTypeName; }; class Win32 { public const uint SHGFI_ICON = 0x100; public const uint SHGFI_LARGEICON = 0x0; // 'Large icon public const uint SHGFI_SMALLICON = 0x1; // 'Small icon [DllImport("shell32.dll")] public static extern IntPtr SHGetFileInfo(string pszPath, uint dwFileAttributes, ref SHFILEINFO psfi, uint cbSizeFileInfo, uint uFlags); } public ShellIcon() { // // TODO: Add constructor logic here // } public static Icon GetSmallIcon(string fileName) { IntPtr hImgSmall; //the handle to the system image list SHFILEINFO shinfo = new SHFILEINFO(); //Use this to get the small Icon hImgSmall = Win32.SHGetFileInfo(fileName, 0, ref shinfo,(uint)Marshal.SizeOf(shinfo),Win32.SHGFI_ICON | Win32.SHGFI_SMALLICON); //The icon is returned in the hIcon member of the shinfo struct return System.Drawing.Icon.FromHandle(shinfo.hIcon); } public static Icon GetLargeIcon(string fileName) { IntPtr hImgLarge; //the handle to the system image list SHFILEINFO shinfo = new SHFILEINFO(); //Use this to get the large Icon hImgLarge = Win32.SHGetFileInfo(fileName, 0, ref shinfo, (uint)Marshal.SizeOf(shinfo), Win32.SHGFI_ICON | Win32.SHGFI_LARGEICON); //The icon is returned in the hIcon member of the shinfo struct return System.Drawing.Icon.FromHandle(shinfo.hIcon); } }

Kirtan Patel · Answer

.csharpcode, .csharpcode pre { font-size: small; color: black; font-family: Consolas, "Courier New", Courier, Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Hi , Here is code How Can you Do that private void button1_Click( object sender, EventArgs e) { //Here i just populated C:\ using Code But you can also iterate through all //Subfolders to add in tree using Same function with Foreach treeView1.Nodes.Add( @"C:" ); PopulateTreeView(@"C:\", treeView1.Nodes[0]); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: Consolas, "Courier New", Courier, Monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } public void PopulateTreeView( string directoryValue, TreeNode parentNode) { try { string [] directoryArray = Directory.GetDirectories(directoryValue); if (directoryArray.Length != 0) { string currentDirectory = "" ; foreach ( string dirinfo in directoryArray) { TreeNode myNode = new TreeNode(dirinfo); parentNode.Nodes.Add(myNode); } // PopulateTreeView(currentDirectory, myNode) } } catch { } Dont forget to mark " Do you like Answer " please it will give me some credits :) Thank you :)

TreeView Structure

Answers (6)