Getting parent node and child node value in treeview

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C#

ASP.NET

Hi all,

I have a treeview with a root node,a child node and subchild nodes.On click of a subchild node I need to get that node value and its parent node value in a popup.I will .Any help will really appreciated .Thanks in advance.

*Root Node 
      
            1.child node 1
                       *(subchild node 1)  
                       *(subchild node 2)  

            2.child node 2
                    
                       *(subchild node 1)  
                       *(subchild node 2) 

On subchild node click I need to get the node values in popup extender .However it is showing null.

What I have tried:

 <asp:TreeView ID="TreeView1" OnSelectedNodeChanged="TreeView1_SelectedNodeChanged" EnableClientScript="true"  PopulateNodesFromClient="true"                              OnTreeNodePopulate="calltree" Font-Size="8pt"   runat="server" ShowLines="True" HoverNodeStyle-Font-Underline="True" SelectedNodeStyle-Font-Bold="True"  ParentNodeStyle-ForeColor="Black">
<Nodes>
<asp:TreeNode Text="Chart Of Cars" Selected="true" SelectAction="Expand" PopulateOnDemand="true"/>
 </Nodes>
                                                    </asp:TreeView>

 public void calltree(object sender, TreeNodeEventArgs e)
       {

           switch (e.Node.Depth)
           {
               case 0:
                   HeaderTitle(e.Node);
                   break;
               case 1:
                    LinkURL(e.Node);
                    break;

               default:
                   break;
           }
       }

       public void HeaderTitle(TreeNode node)
       {
           DataSet ds_ParentNode = objcon.GetDataSet("select distinct ProfileID,profilename from profile
");

           foreach (DataRow row in ds_ParentNode.Tables[0].Rows)
           {
               TreeNode newNode = new TreeNode();
               newNode.Text = row["ProfileID"].ToString() + ' ' + row["profilename"].ToString();
               newNode.Value = row["ProfileID"].ToString();

               newNode.Expanded = false;
               newNode.SelectAction = TreeNodeSelectAction.Expand;
               newNode.PopulateOnDemand = true;
               node.ChildNodes.Add(newNode);
           }

       }

     public void LinkURL(TreeNode node)
        {
           DataSet ds_ParentNode = objcon.GetDataSet("select distinct ProfileID,profilename from profile
");

           foreach (DataRow row in ds_ParentNode.Tables[0].Rows)
           {
               TreeNode newNode = new TreeNode();
               newNode.Text = row["ProfileID"].ToString() + ' ' + row["profilename"].ToString();
               newNode.Value = row["ProfileID"].ToString();
         newNode.ImageUrl = "~/images/office2003_contacts.gif";

                newNode.Expand();
               
                newNode.Expanded = true;
                newNode.PopulateOnDemand = false;
                node.ChildNodes.Add(newNode);
            }

        }
<pre> protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
        {
            
            int index = TreeView1.Nodes.IndexOf(TreeView1.SelectedNode); 
          
              
           TreeView1.SelectedNode.Selected = true;
            if (TreeView1.SelectedNode.Value != "")
            {
                lbl_supname.Text = TreeView1.SelectedNode.Value;
                lbl_drugname.Text = "";
                mpe_First.Show();
                pnl_First.Visible = true;
                UpdatePanel1.Update();
                UpdatePanel1_1.Update();
            }
            else
            {
                mpe_First.Hide();
                //UpdatePanel1.Update();
                pnl_First.Visible = false;
                UpdatePanel1.Update();
            }
            
        }