public void loaddataintreeview(List <eNhaCungCap> ncc, TreeView tv)
{
tv.Nodes.Clear();
TreeNode n;
foreach (eNhaCungCap tmp in nccbll.getAllNCC())
{
n = new TreeNode(tmp.tenNCC);
n.Tag = tmp.maNCC;
tv.Nodes.Add(n);
}
}