private void BindTreeNodesBasedOnRoles(int levelId)
        {
            DataTable dtTree = new DataTable();

            advisorPreferenceBo = new AdviserPreferenceBo();
            dtTree = advisorPreferenceBo.GetTreeNodes(levelId, advisorVo.advisorId).Tables[0];
            foreach (DataRow dr in dtTree.Rows)
            {
                RadTreeNode node = new RadTreeNode(dr["WTN_TreeNodeText"].ToString(), dr["WTN_TreeNodeId"].ToString());
                BindSubTreeNodesBasedOnRoles(ref node, levelId);
                GetTreeView(levelId, ref node);
                // RTVAdmin.Nodes.Add(node);
            }
        }