protected void btnSaveQuyen_Click(object sender, EventArgs e)
        {
            Int32 idNhomQuyen = Int32.Parse(RadTreeViewNhomQuyen.SelectedNode.Value);
            Int32 idChucNang  = Int32.Parse(RadTreeViewChucNang.SelectedNode.Value);

            _entities.DeletePhanQuyenByIDNhomQuyenIDChucNang(idNhomQuyen, idChucNang);
            foreach (ListItem i in cblQuyen.Items)
            {
                if (i.Selected)
                {
                    Aits_Hrm.Model.PhanQuyen pq = new Aits_Hrm.Model.PhanQuyen();
                    pq.IDNhomQuyen  = Int32.Parse(RadTreeViewNhomQuyen.SelectedNode.Value);
                    pq.IDChucNang   = Int32.Parse(RadTreeViewChucNang.SelectedNode.Value);
                    pq.IDQuyen      = Int32.Parse(i.Value);
                    pq.NguoiCapNhat = (int)Session["userID"];
                    pq.NguoiTao     = (int)Session["userID"];
                    pq.NgayCapNhat  = DateTime.Now;
                    pq.NgayTao      = DateTime.Now;
                    _entities.AddToPhanQuyens(pq);
                }
                _entities.SaveChanges();
            }
        }