本文实例展示了DevExpress实现TreeList父子节点CheckState状态同步的方法，在项目开发中有一定的应用价值，具体实现方法如下：

主要功能代码如下：

/// <summary>///同步父子节点勾选状态///说明///在AfterCheckNode事件中使用代码///eg:e.Node.SyncNodeCheckState(e.Node.CheckState);/// </summary>/// <param name="node">需要同步的节点</param>/// <param name="check">节点当前勾选状态</param>public static void SyncNodeCheckState(this TreeListNode node, CheckState check) { SyncNodeCheckState_Child(node, check); SyncNodeCheckState_Parent(node, check); }private static void SyncNodeCheckState_Child(TreeListNode node, CheckState check){ if (node != null) { node.DownRecursiveNode(n => n.CheckState = check); }}private static void SyncNodeCheckState_Parent(TreeListNode node, CheckState check){ if (node.ParentNode != null) { bool _cked = false; CheckState _ckState; foreach (TreeListNode cn in node.ParentNode.Nodes) { _ckState = cn.CheckState; if (check != _ckState) { _cked = !_cked; break; } } node.ParentNode.CheckState = _cked ? CheckState.Indeterminate : check; SyncNodeCheckState_Parent(node.ParentNode, check); }}/// <summary>/// 向下递归TreeListNode节点/// </summary>/// <param name="node">需要向下递归的节点</param>/// <param name="conditionHanlder">委托</param>public static void DownRecursiveNode(this TreeListNode node, Action<TreeListNode> conditionHanlder){ foreach (TreeListNode _childNode in node.Nodes) { conditionHanlder(_childNode); DownRecursiveNode(_childNode, conditionHanlder); }}

代码运行效果如下图所示：