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！
