本文实例展示了DevExpress获取TreeList可视区域节点集合的实现方法，是比较有实用价值的技巧。分享给大家供大家参考。具体实现方法如下：

关键代码如下：

/// <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); }

代码使用方法如下：

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

希望本文所述实例对大家C#程序设计能有所帮助！