Csharp/C Sharp/XML/XML Tree

Display XML file content to TreeView

using System;
using System.Windows.Forms;
using System.Xml;
public class XmlTreeDisplay : System.Windows.Forms.Form{
    private System.Windows.Forms.TreeView treeXml = new TreeView();
    public XmlTreeDisplay() {
        treeXml.Nodes.Clear();
        this.Controls.Add(treeXml);
        // Load the XML Document
        XmlDocument doc = new XmlDocument();
        try {
            doc.Load("books.xml");
        }catch (Exception err) {
            MessageBox.Show(err.Message);
            return;
        }
        ConvertXmlNodeToTreeNode(doc, treeXml.Nodes);
        treeXml.Nodes[0].ExpandAll();
    }
    private void ConvertXmlNodeToTreeNode(XmlNode xmlNode, 
      TreeNodeCollection treeNodes) {
        TreeNode newTreeNode = treeNodes.Add(xmlNode.Name);
        switch (xmlNode.NodeType) {
            case XmlNodeType.ProcessingInstruction:
            case XmlNodeType.XmlDeclaration:
                newTreeNode.Text = "<?" + xmlNode.Name + " " + 
                  xmlNode.Value + "?>";
                break;
            case XmlNodeType.Element:
                newTreeNode.Text = "<" + xmlNode.Name + ">";
                break;
            case XmlNodeType.Attribute:
                newTreeNode.Text = "ATTRIBUTE: " + xmlNode.Name;
                break;
            case XmlNodeType.Text:
            case XmlNodeType.CDATA:
                newTreeNode.Text = xmlNode.Value;
                break;
            case XmlNodeType.rument:
                newTreeNode.Text = "<!--" + xmlNode.Value + "-->";
                break;
        }
        if (xmlNode.Attributes != null) {
            foreach (XmlAttribute attribute in xmlNode.Attributes) {
                ConvertXmlNodeToTreeNode(attribute, newTreeNode.Nodes);
            }
        }
        foreach (XmlNode childNode in xmlNode.ChildNodes) {
            ConvertXmlNodeToTreeNode(childNode, newTreeNode.Nodes);
        }
    }
    public static void Main(){
       Application.Run(new XmlTreeDisplay());
    }
}
/*
<books>
  <A property="a">
    <B>text</B>
    <C>textg</C>
    <D>99999</D>
  </A>
</books>
*/

Read an XML Document and display the file as a Tree

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Threading ;
using System.Text; 
using System.IO ;
using System.Xml;
//
// Read an XML Document and display the file as a Tree.
//
// Shripad Kulkarni 
// Date : May 15, 2002
// 
namespace XMLTree
{
  /// <summary>
  /// Summary description for XMLTreeForm.
  /// </summary>
  public class XMLTreeForm : System.Windows.Forms.Form
  {
    private System.Windows.Forms.MainMenu mainMenu1;
    private System.Windows.Forms.MenuItem menuItem1;
    private System.Windows.Forms.MenuItem menuItem2;
    private System.Windows.Forms.MenuItem menuItem3;
    private System.Windows.Forms.OpenFileDialog openFileDialog1;
    /// <summary>
    /// Required designer variable.
    /// </summary>
    private System.ruponentModel.Container components = null;
    enum VIEW { TREE_VIEW =0} ; 
    string XMLInputFile        = null;
    string FileSize          = "";
    string WorkingDir        = Directory.GetCurrentDirectory(); 
    string OrigFormTitle      = "";
    bool bFileLoaded        = false ;
    int CurrentView          = (int)VIEW.TREE_VIEW ;
    Object NodeTag          = null ;
    Thread t            = null ; 
    TreeNode RootNode        = null ; 
    Point ClickedPoint        = new Point(0,0);
    ArrayList TreeNodeArray      = new ArrayList();
    ImageList tr_il          = new ImageList();
    ImageList tb_il          = new ImageList();
    Bitmap img_fileopen , img_exit , img_collapse , img_expand , img_about;
    
    private System.Windows.Forms.MenuItem menuItem4;
    private System.Windows.Forms.MenuItem menuItem5;
    private System.Windows.Forms.ToolBar toolBar1;
    private System.Windows.Forms.TreeView treeView1;
    private System.Windows.Forms.ToolBarButton Open;
    private System.Windows.Forms.ToolBarButton Exit;
    private System.Windows.Forms.ToolBarButton About;
    private System.Windows.Forms.ToolBarButton SEPARATOR1;
    private System.Windows.Forms.ToolBarButton ExpandAll;
    private System.Windows.Forms.ToolBarButton CollapseAll;
    private System.Windows.Forms.ToolBarButton Stop;
    private System.Windows.Forms.ToolBarButton SEPARATOR2;
    private System.Windows.Forms.ListBox listBox1;
    private System.Windows.Forms.Splitter splitter1;
    private System.Windows.Forms.ToolBarButton SEPARATOR3;
    delegate void MyDelegate();
    public XMLTreeForm()
    {
      InitializeComponent();
    }
    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if (components != null) 
        {
          components.Dispose();
        }
      }
      base.Dispose( disposing );
    }
    #region Windows Form Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
      this.mainMenu1 = new System.Windows.Forms.MainMenu();
      this.menuItem1 = new System.Windows.Forms.MenuItem();
      this.menuItem3 = new System.Windows.Forms.MenuItem();
      this.menuItem2 = new System.Windows.Forms.MenuItem();
      this.menuItem4 = new System.Windows.Forms.MenuItem();
      this.menuItem5 = new System.Windows.Forms.MenuItem();
      this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
      this.toolBar1 = new System.Windows.Forms.ToolBar();
      this.Open = new System.Windows.Forms.ToolBarButton();
      this.SEPARATOR1 = new System.Windows.Forms.ToolBarButton();
      this.ExpandAll = new System.Windows.Forms.ToolBarButton();
      this.CollapseAll = new System.Windows.Forms.ToolBarButton();
      this.Stop = new System.Windows.Forms.ToolBarButton();
      this.SEPARATOR3 = new System.Windows.Forms.ToolBarButton();
      this.Exit = new System.Windows.Forms.ToolBarButton();
      this.About = new System.Windows.Forms.ToolBarButton();
      this.SEPARATOR2 = new System.Windows.Forms.ToolBarButton();
      this.treeView1 = new System.Windows.Forms.TreeView();
      this.listBox1 = new System.Windows.Forms.ListBox();
      this.splitter1 = new System.Windows.Forms.Splitter();
      this.SuspendLayout();
      // 
      // mainMenu1
      // 
      this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                            this.menuItem1,
                                            this.menuItem4});
      // 
      // menuItem1
      // 
      this.menuItem1.Index = 0;
      this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                            this.menuItem3,
                                            this.menuItem2});
      this.menuItem1.OwnerDraw = true;
      this.menuItem1.Text = "File";
      this.menuItem1.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.menuItem1_DrawItem);
      this.menuItem1.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.menuItem1_MeasureItem);
      // 
      // menuItem3
      // 
      this.menuItem3.Index = 0;
      this.menuItem3.OwnerDraw = true;
      this.menuItem3.Text = "Open";
      this.menuItem3.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.menuItem3_DrawItem);
      this.menuItem3.Click += new System.EventHandler(this.menuItem3_Click);
      this.menuItem3.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.menuItem3_MeasureItem);
      // 
      // menuItem2
      // 
      this.menuItem2.Index = 1;
      this.menuItem2.OwnerDraw = true;
      this.menuItem2.Text = "Exit";
      this.menuItem2.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.menuItem3_DrawItem);
      this.menuItem2.Click += new System.EventHandler(this.menuItem2_Click);
      this.menuItem2.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.menuItem3_MeasureItem);
      // 
      // menuItem4
      // 
      this.menuItem4.Index = 1;
      this.menuItem4.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
                                            this.menuItem5});
      this.menuItem4.OwnerDraw = true;
      this.menuItem4.Text = "Help";
      this.menuItem4.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.menuItem1_DrawItem);
      this.menuItem4.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.menuItem1_MeasureItem);
      // 
      // menuItem5
      // 
      this.menuItem5.Index = 0;
      this.menuItem5.OwnerDraw = true;
      this.menuItem5.Text = "About";
      this.menuItem5.DrawItem += new System.Windows.Forms.DrawItemEventHandler(this.menuItem3_DrawItem);
      this.menuItem5.Click += new System.EventHandler(this.menuItem5_Click);
      this.menuItem5.MeasureItem += new System.Windows.Forms.MeasureItemEventHandler(this.menuItem3_MeasureItem);
      // 
      // openFileDialog1
      // 
      this.openFileDialog1.Filter = "XML FILES| *.xml";
      this.openFileDialog1.FileOk += new System.ruponentModel.CancelEventHandler(this.openFileDialog1_FileOk);
      // 
      // toolBar1
      // 
      this.toolBar1.Appearance = System.Windows.Forms.ToolBarAppearance.Flat;
      this.toolBar1.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
                                            this.Open,
                                            this.SEPARATOR1,
                                            this.ExpandAll,
                                            this.CollapseAll,
                                            this.Stop,
                                            this.SEPARATOR3,
                                            this.Exit,
                                            this.About,
                                            this.SEPARATOR2});
      this.toolBar1.ButtonSize = new System.Drawing.Size(16, 16);
      this.toolBar1.Cursor = System.Windows.Forms.Cursors.Hand;
      this.toolBar1.DropDownArrows = true;
      this.toolBar1.Name = "toolBar1";
      this.toolBar1.ShowToolTips = true;
      this.toolBar1.Size = new System.Drawing.Size(840, 25);
      this.toolBar1.TabIndex = 0;
      this.toolBar1.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar1_ButtonClick);
      // 
      // Open
      // 
      this.Open.ImageIndex = 0;
      this.Open.ToolTipText = "Open XML File";
      // 
      // SEPARATOR1
      // 
      this.SEPARATOR1.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
      // 
      // ExpandAll
      // 
      this.ExpandAll.Enabled = false;
      this.ExpandAll.ImageIndex = 3;
      this.ExpandAll.ToolTipText = "Expand All Nodes";
      // 
      // CollapseAll
      // 
      this.CollapseAll.Enabled = false;
      this.CollapseAll.ImageIndex = 4;
      this.CollapseAll.ToolTipText = "Collapse All Nodes";
      // 
      // Stop
      // 
      this.Stop.Enabled = false;
      this.Stop.ImageIndex = 5;
      this.Stop.ToolTipText = "Stop";
      // 
      // SEPARATOR3
      // 
      this.SEPARATOR3.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
      // 
      // Exit
      // 
      this.Exit.ImageIndex = 1;
      this.Exit.ToolTipText = "Exit Application";
      // 
      // About
      // 
      this.About.ImageIndex = 2;
      this.About.ToolTipText = "Help About";
      // 
      // SEPARATOR2
      // 
      this.SEPARATOR2.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
      // 
      // treeView1
      // 
      this.treeView1.BackColor = System.Drawing.Color.White;
      this.treeView1.Cursor = System.Windows.Forms.Cursors.Hand;
      this.treeView1.Dock = System.Windows.Forms.DockStyle.Left;
      this.treeView1.Font = new System.Drawing.Font("Verdana", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
      this.treeView1.FullRowSelect = true;
      this.treeView1.HotTracking = true;
      this.treeView1.ImageIndex = -1;
      this.treeView1.ItemHeight = 16;
      this.treeView1.Location = new System.Drawing.Point(0, 25);
      this.treeView1.Name = "treeView1";
      this.treeView1.SelectedImageIndex = -1;
      this.treeView1.Size = new System.Drawing.Size(360, 472);
      this.treeView1.TabIndex = 3;
      this.treeView1.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.treeView1_AfterSelect);
      // 
      // listBox1
      // 
      this.listBox1.Dock = System.Windows.Forms.DockStyle.Fill;
      this.listBox1.Font = new System.Drawing.Font("Verdana", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
      this.listBox1.ForeColor = System.Drawing.Color.Maroon;
      this.listBox1.HorizontalScrollbar = true;
      this.listBox1.ItemHeight = 16;
      this.listBox1.Location = new System.Drawing.Point(368, 25);
      this.listBox1.Name = "listBox1";
      this.listBox1.ScrollAlwaysVisible = true;
      this.listBox1.Size = new System.Drawing.Size(472, 468);
      this.listBox1.TabIndex = 12;
      // 
      // splitter1
      // 
      this.splitter1.Location = new System.Drawing.Point(360, 25);
      this.splitter1.Name = "splitter1";
      this.splitter1.Size = new System.Drawing.Size(8, 472);
      this.splitter1.TabIndex = 11;
      this.splitter1.TabStop = false;
      // 
      // XMLTreeForm
      // 
      this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
      this.ClientSize = new System.Drawing.Size(840, 497);
      this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                      this.listBox1,
                                      this.splitter1,
                                      this.treeView1,
                                      this.toolBar1});
      this.Menu = this.mainMenu1;
      this.Name = "XMLTreeForm";
      this.Text = "XML Viewer";
      this.Resize += new System.EventHandler(this.XMLTreeForm_Resize);
      this.Load += new System.EventHandler(this.XMLTreeForm_Load);
      this.ResumeLayout(false);
    }
    #endregion
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main() 
    {
      Application.Run(new XMLTreeForm());
    }
    private void XMLTreeForm_Load(object sender, System.EventArgs e)
    {
      // Add images to the imageList for treeView
      tr_il.Images.Add(new Icon(WorkingDir+ "\\ROOT.ICO"));    //ROOT    0
      tr_il.Images.Add(new Icon(WorkingDir+ "\\ELEMENT.ICO"));  //ELEMENT  1
      tr_il.Images.Add(new Icon(WorkingDir+ "\\EQUAL.ICO"));    //ATTRIBUTE  2
      treeView1.ImageList = tr_il; 
      // Add images to the imageList for Toolbar
      tb_il.Images.Add(new Bitmap(WorkingDir+ "\\FileOpen.bmp"));    //ROOT    0
      tb_il.Images.Add(new Bitmap(WorkingDir+ "\\exit.bmp"));      //ELEMENT  1
      tb_il.Images.Add(new Bitmap(WorkingDir+ "\\about.bmp"));    //ATTRIBUTE  2
      tb_il.Images.Add(new Bitmap(WorkingDir+ "\\ExpandTree.bmp"));  //ATTRIBUTE  3
      tb_il.Images.Add(new Bitmap(WorkingDir+ "\\CollapseTree.bmp"));  //ATTRIBUTE  4
      tb_il.Images.Add(new Bitmap(WorkingDir+ "\\Stop.bmp"));      //ATTRIBUTE  5
      toolBar1.ImageList = tb_il; 
      // Add images to the imageList for the MenuBar
      img_fileopen  = new Bitmap("FileOpen.bmp"); 
      img_exit    = new Bitmap("exit.bmp"); 
      img_expand    = new Bitmap("ExpandTree.bmp");
      img_collapse  = new Bitmap("CollapseTree.bmp");
      img_about    = new Bitmap("about.bmp"); 
      OrigFormTitle  = this.Text ; 
    }
    private void menuItem3_Click(object sender, System.EventArgs e)
    {
      openFileDialog1.ShowDialog(this);
    }
    private void openFileDialog1_FileOk(object sender, System.ruponentModel.CancelEventArgs e)
    {
      // Initialize Buttons
      EnableDisableControls() ;
      // Initialize All the Arrays
      treeView1.Nodes.Clear() ;
      listBox1.Items.Clear() ;
      TreeNodeArray.Clear();
      bFileLoaded = false ;
      XMLInputFile  = openFileDialog1.FileName ;
      this.Text    = OrigFormTitle + " ..." + XMLInputFile ; 
      openFileDialog1.Dispose() ;
      
      // Get the filename and filesize
      FileInfo f    = new FileInfo(XMLInputFile);
      FileSize    = f.Length.ToString();
      // Begin thread to read input file and load into the ListBox
      Thread t    = new Thread(new ThreadStart(PopulateList));
      t.Start();
      // Begin thread to read input file and populate the Tree
      Thread tt    = new Thread(new ThreadStart(PopulateTree));
      tt.Start();
    }
    private void PopulateList()
    {
      // Load the File
      LoadFileIntoListBox();
    }
  
    private void PopulateTree()
    {
      // TreeView Nodes cannot be added in a thread , until the thread is marshalled
      // using an Invoke or beginInvoke call.
      // We create a delegate ( Funtion Pointer ) and invoke the thread using he delegate
      MyDelegate dlg_obj ;
      dlg_obj = new MyDelegate(ParseFile);  
      treeView1.Invoke(dlg_obj);
    }
    private void ParseFile()
    {
      // Use the XMLReader class to read the XML File and populate the
      // treeview
      try
      {
        XmlTextReader reader    = null;
        reader            = new XmlTextReader(XMLInputFile);
        reader.WhitespaceHandling  = WhitespaceHandling.None;
        string readerName      = "" ;
        bool start_node        = false ;
        int depth          = 0;
        TreeNode WORKINGNODE    = null ; 
        RootNode          = null ; 
        TreeNode AttrNode      = null ;
        TreeNode newNode      = null ;
        bool bIsEmpty        = false ;
        while (reader.Read())
        {
               switch (reader.NodeType)
          {
            case XmlNodeType.Element:
              readerName  = reader.Name;
              bIsEmpty  = reader.IsEmptyElement;
              if ( ! start_node ) 
              { 
                start_node          = true ;
                RootNode          = this.treeView1.Nodes.Add(readerName);
                AssociateTag(RootNode , reader.LineNumber);
                RootNode.SelectedImageIndex  = 0 ;
                RootNode.ImageIndex      = 0 ;
                continue ; 
              }           
              depth = reader.Depth ; 
              if ( reader.IsStartElement() && depth == 1  ) 
              {
                WORKINGNODE = RootNode.Nodes.Add(reader.Name);
                AssociateTag(WORKINGNODE, reader.LineNumber);
              }
              else
              {
                TreeNode parent = WORKINGNODE;
                WORKINGNODE    = parent.Nodes.Add(reader.Name);
                AssociateTag(WORKINGNODE, reader.LineNumber);
              }
              WORKINGNODE.SelectedImageIndex= 1 ;
              WORKINGNODE.ImageIndex= 1 ;
              for (int i = 0; i < reader.AttributeCount; i++)
              {
                reader.MoveToAttribute(i);
                string rValue  = reader.Value.Replace("\r\n", " ");
                AttrNode    = WORKINGNODE.Nodes.Add(reader.Name);
//                AttrNode = WORKINGNODE.Nodes.Add(reader.Name +"="+rValue);
                AssociateTag(AttrNode, reader.LineNumber);
                AttrNode.SelectedImageIndex  = 1 ;
                AttrNode.ImageIndex      = 1 ;
                TreeNode tmp        = AttrNode.Nodes.Add(rValue);
                tmp.SelectedImageIndex    = 2 ;
                tmp.ImageIndex        = 2 ;
                AssociateTag(tmp, reader.LineNumber);
                AttrNode.SelectedImageIndex  = 2 ;
                AttrNode.ImageIndex      = 2 ;
              }
              if ( bIsEmpty ) 
                WORKINGNODE = WORKINGNODE.Parent ; 
              
              break;
            case XmlNodeType.Text:
            {
              string rValue        = reader.Value.Replace("\r\n" , " ");
              newNode            = WORKINGNODE.Nodes.Add(rValue);
              AssociateTag(newNode, reader.LineNumber);
              newNode.SelectedImageIndex  = 2 ;
              newNode.ImageIndex      = 2 ;
            }
              break;
            case XmlNodeType.EndElement:
              WORKINGNODE          = WORKINGNODE.Parent ; 
              break;
          }       
            }           
        reader.Close();
        RootNode.Expand();
      }
      catch(Exception  eee) 
      {
        Console.WriteLine(eee.Message);
      }
    }
    private void treeView1_Click(object sender, System.EventArgs  e)
    {  
    }
    private void treeView1_AfterSelect(object sender, System.Windows.Forms.TreeViewEventArgs e)
    {
      if ( ! bFileLoaded ) return ; 
      // The treenode is selected. Every node is tagged with LineNumber ( from input file ).
      // This allows us to jump to the line in the file.
      TreeNode tn;
      tn      = (TreeNode)e.Node;
      Object ln  = tn.Tag ; 
      int line  = Convert.ToInt32(ln.ToString());
      MoveToLine(line);
    }
    private void menuItem2_Click(object sender, System.EventArgs e)
    {
      AppExit();
    }
    private void AppExit()
    {
      Application.Exit() ;
    }
    private void LoadFileIntoListBox()
    {
      // Load the xml file into a listbox.
      try
      {
            StreamReader sr = new StreamReader(XMLInputFile, Encoding.ASCII);
        sr.BaseStream.Seek(0, SeekOrigin.Begin);
        while (sr.Peek() > -1) 
        {
               Thread.Sleep(5);
               string str = sr.ReadLine();
          listBox1.Items.Add(str);
        }
        sr.Close();
        bFileLoaded = true ;
        listBox1.SetSelected(1 , true);
      }
      catch(Exception ee)
      {
        Console.WriteLine("Error Reading File into ListBox " + ee.Message);
      }
    }
    private void MoveToLine(int ln)
    {
      // Select the input line from the file in the listbox
      listBox1.SetSelected(ln-1 , true);
    }
    private void AssociateTag(TreeNode t , int l)
    {
      // Associate a line number Tag with every node in the tree
      NodeTag = new Object();
      NodeTag = l ; 
      t.Tag  = NodeTag ; 
    }
    private void menuItem5_Click(object sender, System.EventArgs e)
    {
      // About Box is clicked
      ShowAboutBox();
    }
    private void ShowAboutBox()
    {
      About abt = new About() ;
      abt.ShowDialog() ;
    }
    
    private void EnableDisableControls()
    {
      // Enable Disable Buttons
      switch ( CurrentView ) 
      {
        case 0 :  // TREE VIEW
        {
          ExpandAll.Enabled  = true;
          CollapseAll.Enabled = true;
          Stop.Enabled    = true ;
          treeView1.Visible  = true;
        }
        break ;
        case 1 :  // REPORT VIEW
        {
          ExpandAll.Enabled  = false ;
          CollapseAll.Enabled = false ;
          Stop.Enabled    = false ;
        }
        break ;
      }
    }
    private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
    {
      // Invoke the function upon clicking the toolbar button
      int x = int.Parse(toolBar1.Buttons.IndexOf(e.Button).ToString());
      switch(toolBar1.Buttons.IndexOf(e.Button))
      {
        case 0:
          openFileDialog1.ShowDialog(this);
          break; 
        case 1:   
          //separator
          break; 
        case 2:
          TExpandAll() ;
          break; 
        case 3:
          TCollapseAll();          
          break; 
        case 4:
          if ( t != null && t.IsAlive ) 
          {
            t.Abort() ;
            t = null ; 
            EnableDisableControls();
          }
          break; 
        case 5:
          break; 
        case 6:
          AppExit();
          break; 
        case 7:
          ShowAboutBox();
          break; 
        case 8:  // separator
          //separator
          break; 
        case 9:  // Go Back 
          break; 
        case 10:// separator
          break; 
        case 11:// Go Back 
          CurrentView = (int)VIEW.TREE_VIEW ;
          EnableDisableControls();
          break; 
      }
    }
    private void TExpandAll()
    {
      t = new Thread(new ThreadStart(TE));
      t.Start();
    }
    
    private void TE()
    {
      // Expand all nodes in the tree
      treeView1.ExpandAll() ;
    }
    private void TCollapseAll()
    {
      // Collapse all nodes in the tree
      treeView1.CollapseAll() ;
    }
    void Clear()
    {
      TreeNodeArray.Clear();
    }
    private void menuItem1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
    {  
      //Owner Draw Menu Items
      //Get the bounding rectangle
      Rectangle rc = new Rectangle(e.Bounds.X+1 , e.Bounds.Y+1, e.Bounds.Width-5, e.Bounds.Height-1);
      //Fill the rectangle
      e.Graphics.FillRectangle(new SolidBrush(Color.LightGray) , rc);
      //Unbox the menu item
      MenuItem s = (MenuItem)sender ;
      string s1 = s.Text ;
      //Set the stringformat object
      StringFormat sf = new StringFormat();
      sf.Alignment = StringAlignment.Center ;
      e.Graphics.DrawString(s1 , new Font("Ariel" ,10), new SolidBrush(Color.Black) , rc , sf );
      Console.WriteLine(e.State.ToString());
      //Check if the object is selected. 
      if ( e.State ==  (DrawItemState.NoAccelerator | DrawItemState.Selected)  ||  
        e.State ==  ( DrawItemState.NoAccelerator | DrawItemState.HotLight)  ) 
      {
        // Draw selected menu item
        e.Graphics.FillRectangle(new SolidBrush(Color.LightYellow) , rc);
        e.Graphics.DrawString( s1 , new Font("Veranda" , 10 , FontStyle.Bold  ) , new SolidBrush(Color.Red), rc ,sf);
        e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black)), rc );
      }
      e.DrawFocusRectangle();
      e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black), 1 ), rc );
    }
    private void menuItem1_MeasureItem(object sender, System.Windows.Forms.MeasureItemEventArgs e)
    {
      // Set the menu item height
      e.ItemWidth = 75 ;  
    }
    private void menuItem3_MeasureItem(object sender, System.Windows.Forms.MeasureItemEventArgs e)
    {
      // Set the sub menu item height and width
      e.ItemWidth = 95 ;
      e.ItemHeight = 25 ;    
    }
    private void menuItem3_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
    {
      //Owner Draw Sub Menu Items
      Rectangle rc = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Width, e.Bounds.Height);
      e.Graphics.FillRectangle(new SolidBrush(Color.LightGray) , rc);
      MenuItem s = (MenuItem)sender ;
      string s1 = s.Text ;
      StringFormat sf = new StringFormat();
      sf.Alignment = StringAlignment.Far ;
      sf.LineAlignment  = StringAlignment.Center;

      Image useImage = null ;
      if ( s1 == "Open" ) 
      {
        useImage = img_fileopen;
      }
      if ( s1 == "ExpandAll" )
      {
        if ( CurrentView == (int)VIEW.TREE_VIEW ) 
          s.Enabled = true;
        else
          s.Enabled = false ;
        useImage = img_expand;
      }
      if ( s1 == "Exit" )
      {
        useImage = img_exit;
      }
      if ( s1 == "CollapseAll" )
      {
        if ( CurrentView == (int)VIEW.TREE_VIEW ) 
          s.Enabled = true;
        else
          s.Enabled = false ;
        useImage = img_collapse;
      }
      if ( s1 == "About" )
      {
        useImage = img_about;
      }
      Rectangle rcText = rc ;
      rcText.Width-=5 ;
      e.Graphics.DrawString(s1 , new Font("Veranda" ,10), new SolidBrush(Color.Blue) , rcText, sf );
      e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.LightGray)), rc );
      if ( e.State == ( DrawItemState.NoAccelerator | DrawItemState.Selected)) 
      {
        Rectangle rc1= rc ;
        rc1.X = rc1.X + useImage.Width + 5 ;
        rc1.Width = rc.Width - 25 ;
        rc1.Height = rc.Height- 2 ;
        e.Graphics.FillRectangle(new SolidBrush(Color.LightYellow) , rc);
        e.Graphics.DrawString( s1 , new Font("Veranda" , 10 , FontStyle.Bold | FontStyle.Underline) , new SolidBrush(Color.Red), rcText,sf);
        e.Graphics.DrawRectangle(new Pen(new SolidBrush(Color.Black),3), rc );
        e.DrawFocusRectangle();
      }
      if ( useImage != null ) 
      {
        SizeF sz = useImage.PhysicalDimension;
        e.Graphics.DrawImage(useImage, e.Bounds.X+5 , ( e.Bounds.Bottom + e.Bounds.Top ) /2 - sz.Height/2);
      }  
    }
    private void XMLTreeForm_Resize(object sender, System.EventArgs e)
    {
    }
  }
}

<A href="http://www.nfex.ru/Code/CSharpDownload/XMLTree.zip">XMLTree.zip( 85 k)</a>