DevExpress获取TreeList可视区域节点集合的实现方法

/// <summary>/// 获取可视区域节点/// </summary>/// <param name="treeList">TreeList</param>/// <param name="conditonHanlder">条件委托</param>/// <returns>可视区域节点集合</returns>public static List<TreeListNode> GetVisibleNodes(this TreeList treeList, Predicate<TreeListNode> conditonHanlder){  List<TreeListNode> _visibleNodes = new List<TreeListNode>();  RowsInfo _rowsInfo = treeList.ViewInfo.RowsInfo;  foreach (RowInfo ri in _rowsInfo.Rows)  { TreeListNode _curNode = ri.Node; if (conditonHanlder(_curNode)) {   _visibleNodes.Add(_curNode); }  }  return _visibleNodes;}/// <summary>/// 获取可视区域节点/// </summary>/// <param name="treeList">TreeList</param>/// <returns>可视区域节点集合</returns>public static List<TreeListNode> GetVisibleNodes(this TreeList treeList){  return GetVisibleNodes(treeList, n => 1 == 1);}

MessageBox.Show(tvwLamp.LHTree.GetVisibleNodes(n => n.GetNodeType() == NodeType.Cab).Count.ToString());