Devexpress TreeList 展开和折叠当前选中节点

1.展开：

 1         private void barButtonItem6_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 2         {
 3             ParentNodeExpend(treeListEstateInfo.FocusedNode);
 4         }
 5         /// <summary>
 6         /// 展开当前节点及父节点
 7         /// </summary>
 8         /// <param name="_node"></param>
 9         public void ParentNodeExpend(TreeListNode node)
10         {
11             TreeListNode _cNode = node;
12             treeListEstateInfo.Nodes.TreeList.FindNodeByID(_cNode.Id).Expanded = true;
13             while (_cNode.ParentNode != null)
14             {
15                 treeListEstateInfo.Nodes.TreeList.FindNodeByID(_cNode.ParentNode.Id).Expanded = true;
16                 _cNode = _cNode.ParentNode;
17             }
18         }

2.折叠

 1         private void barButtonItem7_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
 2         {
 3             CloseFocuseNode(treeListEstateInfo.FocusedNode);
 4         }
 5         /// <summary>
 6         /// 折叠当前选中节点
 7         /// </summary>
 8         /// <param name="_node"></param>
 9         public void CloseFocuseNode(TreeListNode node)
10         {
11             treeListEstateInfo.Nodes.TreeList.FindNodeByID(node.Id).Expanded = false;
12         }