how to place data in treeview from database

i used below coding to fetch data from database to bind in treeview., i am getting fromdate details according to selected company from table., for example if i choose A then i am getting treeview like
 

                           A
                            --20/10/2012
                           A 
                            --23/10/2012
                           A
                            --27/10/2012
                           A 
                            --29/10/2012

but actual i want like
 

                           A
                            --20/10/2012                            
                            --23/10/2012
                            --27/10/2012                            
                            --29/10/2012

 

        private void ShowMenu_Click(object sender, EventArgs e)
        {
            
            try
            {
                gn.cnopen();
                cmd = new SqlCommand("FETCH_CONFERENCE_HALL_DETAILS_MENUS", gn.cn());
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@TYPE", 2);
                cmd.Parameters.AddWithValue("@FROM_DATE", "");
                cmd.Parameters.AddWithValue("@TO_DATE", "");
                cmd.Parameters.AddWithValue("@COMPANYNAME",ddlcompanyname.SelectedItem.ToString());
                
                DataTable dt = new DataTable();
                SqlDataAdapter da = new SqlDataAdapter(cmd);
 
                
                TreeNode trn;
                      
                TreeNode node;
                TreeNode[] array;
               
                    treeView1.Nodes.Clear();
                    dt.Clear();
                    da.Fill(dt);
 
                    string cmn = dt.Rows[0]["company_name"].ToString();
                   if (dt.Rows.Count > 0)
                    {
                       for (int cn = 0; cn <= dt.Rows.Count - 1; cn++)
                        {
                            string getfrmdate = dt.Rows[cn]["fromdate"].ToString();
                            
                            node = new TreeNode(getfrmdate);
                            getfrmdate = "";
                            array = new TreeNode[] { node };
                            trn = new TreeNode(cmn, array);
                            treeView1.Nodes.Add(trn);
                                                   
                       }
                    }
               
            }
            catch (SqlException err)
            {
                MessageBox.Show(err.Message, "", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

 
[edit]code block added[/edit]