How to show Selected treeview node's attribute,values in respective listbox and textbox in C#?

Question

Hi everyone,
I have to create a project in C# in which i have to create a XML Tree View, select a xml file from hard drive(System) it is displayed as Tree View on winform.

When a user selects a particular node/element in the tree view,its attributes and values have to be displayed in list box and text box respectively.

Till now i have done a part of it like selecting it from Openfiledialog(Browse) showing it in tree View and all the attributes related to the XML file in list box.
But i don't know how to put a code in
private void treeViewObj_AfterSelect(object sender, TreeViewEventArgs e)
{
//what to write here.
}
What i have done till now is here :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Xml;
using System.Text;
using System.Windows.Forms;

namespace LoadXMLtreeDisplay
{
    public partial class TreeDisplay : Form
    {
        //Declaring Treeview in Listbox
        TreeView listViewobj = new TreeView();

        //Declare XML Document object
        XmlDocument xdoc = new XmlDocument();
       
         //Constructor of class
        public TreeDisplay( )
        {
            InitializeComponent();
            this.Controls.Add(treeViewObj);
            this.listBoxshow.SelectedIndexChanged += new System.EventHandler(this.listBoxshow_SelectedIndexChanged);
        }//constructor

        private void treeDocLoadMethod(string nameofFile)
        {
            try
            {
                //TextBox txtBoxfile = new TextBox();
                txtBoxfile.Text = nameofFile;

                //Create XML document & load the XML file.
                //XmlDocument xdoc = new XmlDocument();
                xdoc.Load(nameofFile);

                this.treeViewObj.Nodes.Clear();
                this.treeViewObj.Nodes.Add(new TreeNode(xdoc.DocumentElement.Name));
                TreeNode tNodeObj = new TreeNode();
                tNodeObj = this.treeViewObj.Nodes[0];

                XmlNodeList nodeList = xdoc.SelectNodes("//settings/tables/table/name[. ='{0}']");
                XmlNode xNode = xdoc.DocumentElement;//nodeList.Item(0).ParentNode;

                //Declaring function for adding Nodes to tree View.
                //AddingNodesToTree(xNode,tNodeObj);

                ConvertAllXmlnodetoTreenode(xdoc, treeViewObj.Nodes);

                treeViewObj.Nodes[0].Expand();
                treeViewObj.CollapseAll();

                Cursor = System.Windows.Forms.Cursors.Default;
            }
       
            catch (XmlException xmlex)
           {
             MessageBox.Show(xmlex.Message, "ERROR");
            }//catch
            catch(Exception exp)
            {
                txtBoxfile.Text = exp.Message;
            }
        }//treeDocLoadMethod       
      
        private void ConvertAllXmlnodetoTreenode(XmlNode xmlNode, TreeNodeCollection treeNodeCollection)
        {
            TreeNode treeNodeobj = treeNodeCollection.Add(xmlNode.Name);
           
            switch (xmlNode.NodeType)
            {
                case XmlNodeType.ProcessingInstruction:
                case XmlNodeType.XmlDeclaration:
                    treeNodeobj.Text = "<?" + xmlNode.Name + " " + xmlNode.Value + "?>";
                      break;
                case XmlNodeType.Element:
                    treeNodeobj.Text = "<" + xmlNode.Name + ">";
                    break;
                case XmlNodeType.Attribute:
                    treeNodeobj.Text = "ATTRIBUTE: " + xmlNode.Name;
                    listBoxshow.Items.Add(treeNodeobj.Text);
                    break;
                case XmlNodeType.Text:
                case XmlNodeType.CDATA:
                    treeNodeobj.Text = xmlNode.Value;
                    listBoxshow.Items.Add(treeNodeobj.Text);
                    break;
                case XmlNodeType.Comment:
                    treeNodeobj.Text = "<!--" + xmlNode.Value + "-->";
                    break;
            }//switch
            if (xmlNode.Attributes != null)
            {
                foreach (XmlAttribute attribute in xmlNode.Attributes)
                {
                    ConvertAllXmlnodetoTreenode(attribute, treeNodeobj.Nodes);
                   
                }
            }

             foreach (XmlNode childNode in xmlNode.ChildNodes)
             {
                 ConvertAllXmlnodetoTreenode(childNode, treeNodeobj.Nodes);
                
             }

           }// ConvertAllXmlnodetoTreenode Method
   
        private void ConvertAddTreeNodestoTree(XmlNode xnode, TreeNode tnode)
         {
             XmlNode xNode;
             TreeNode treeNode;
             XmlNodeList nodeList;
                       
             if (xnode.HasChildNodes)
             {
                 nodeList = xnode.ChildNodes;
                 for (int i = 0; i <= nodeList.Count-1;i++)
                 {
                     xNode = xnode.ChildNodes[i];
                     tnode.Nodes.Add(new TreeNode(xNode.Name));
                     treeNode = tnode.Nodes[i];
                     ConvertAllXmlnodetoTreenode(xNode,treeNode.Nodes);
                 }//for
             }//if
             else
             {
                 tnode.Text = xnode.OuterXml.Trim();
             }//else
         }
        private void ExpandBtn_Click(object sender, EventArgs e)
         {
            try
             {
                 if (this.ExpandBtn.Text == "Expand TreeNodes")
                 {
                     this.treeViewObj.ExpandAll();
                     this.ExpandBtn.Text = "Collapse TreeNodes";
                  }//if
              else
                 {
                    this.treeViewObj.CollapseAll();
                    this.ExpandBtn.Text = "Expand TreeNodes";
                 }//else
             }//try
             catch(Exception exp)
             {
                 MessageBox.Show(exp.Message,"Error");
             }//catch
         }//Expand button
       
         private void btnBrowse_Click(object sender, EventArgs e)
         {
             txtBoxfile.Clear();
             listBoxshow.Items.Clear();
             listBoxeg.Items.Clear();
             ExpandBtn.Text = "Expand TreeNodes";
             OpenFileDialog open = new OpenFileDialog();
             //open.InitialDirectory = @"C:\";
             open.Filter = "XML Files(*.xml)|(*.xhtml)|All files(*.*)|*.*";
             open.FilterIndex = 2;
             open.RestoreDirectory = true;
           
             if (open.ShowDialog(this)== DialogResult.OK)
             {
                 txtBoxfile.Text = open.FileName;
                 treeDocLoadMethod(open.FileName); //this variable gives the name of selected file
             }
            
         }//Browse button

        private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
         {

         }
        private void btnClear_Click(object sender, EventArgs e)
        {
            listBoxshow.Items.Clear();
            listBoxeg.Items.Clear();
            txtBoxfile.Clear();
            textBox1.Clear();
           
        }//Clear button

        private void treeViewObj_AfterSelect(object sender, TreeViewEventArgs e)
        {
            //listBoxshow.Items.Clear();
            listBoxeg.Items.Clear();
            XmlNode xNode = xdoc.DocumentElement;
            TreeNode selNode = e.Node;
            //textBox1.Text = selNode.Text;
                       
           //if(xNode.Attributes != null)
           if (e.Node.TreeView.SelectedNode != null)
           {
               foreach (XmlAttribute attribute in xNode.Attributes)
                {
                 ShowinListboxandTextbox(attribute, selNode.Nodes);                                                                     
                 }
           }
          }
          
        private void ShowinListboxandTextbox(XmlNode xmlNode,TreeNodeCollection treeNodecollect)
         {
             TreeNode treeNodeobj = treeNodecollect.Add(xmlNode.Name);

             switch (xmlNode.NodeType)
             {
                case XmlNodeType.Attribute:
                     treeNodeobj.Text = "ATTRIBUTE: " + xmlNode.Name;
                     listBoxeg.Items.Add(treeNodeobj.Text);
                     break;
                case XmlNodeType.CDATA:
                     treeNodeobj.Text = xmlNode.Value;
                     listBoxeg.Items.Add(treeNodeobj.Text);
                     break;
              }//switch             
         }//ShowinListboxandTextbox       
       
   }//class
}//namespace
This dosent show any errors but i am not getting the desired results..
Please help me out as early as possible by providing the right part of code to be written..
Thanks in advance.