C# treeview and listview

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C#

private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
        {
            //SqlConnection con = new SqlConnection("Data Source=AKS14;Initial Catalog=TreeviewSampleDb;Integrated Security=SSPI");
            //DataSet dataset = new DataSet();
            //con.Open();
            //dataset.Clear();
            //string strcon = "select * from tblHead";
            //SqlDataAdapter da = new SqlDataAdapter(strcon, con);
            //da.Fill(dataset);

            // write this code inside your treeview NodeMouseCLick event
            TreeNode tn = e.Node;
            //create a datatable with two columns
              
            DataTable aTable = new DataTable();
            aTable.Columns.Add("Headid", typeof(string));
            aTable.Columns.Add("HeadName", typeof(string));
            //in this for each loop we will traverse through the clicked tree node 
            // and get all child nodes name and tag(value) and keep it in datarow 
            // of our datatable .        
            foreach (TreeNode t1 in tn.Nodes)
            {
                DataRow dr;
                dr = aTable.NewRow();
                dr[0] = t1.Text;
                dr[1] = t1.Tag.ToString();
            }
            //finally we will make datatabe as the source of listview
            listView1.datasource = aTable;

leftside treeview and right side listview in windows c#.after click parents node in treeview the child show in listview with his ids. how to do???
listview1.datasource is not working in windows.