DevExpress实现TreeList节点互斥的方法

/// <summary>/// 节点互斥同步/// 说明/// eg:///TreeListNode _node = e.Node;///_node.SyncMutexNodeCheckState(_node.CheckState, n => n.GetNodeType() == NodeType.Cab);/// </summary>/// <param name="node">需要互斥同步的节点</param>/// <param name="checkState">节点状态</param>/// <param name="checkHanlder">互斥条件【委托】</param>public static void SyncMutexNodeCheckState(this TreeListNode node, CheckState checkState, Predicate<TreeListNode> checkHanlder){  TreeList _tree = node.TreeList;  if (checkHanlder(node))//当前节点符合互斥条件时候  { _tree.DownRecursiveTree(n => n.CheckState = CheckState.Unchecked);  }  else  { TreeListNode _curParentNode = node.GetParentNode(checkHanlder);//获取符合互斥条件的父节点 if (_curParentNode == null) return; TreeListNode _thePubleNode = node.GetPublicParentNode(checkHanlder);//获取符合互斥条件的公共父节点 if (_thePubleNode == null) return; foreach (TreeListNode n in _thePubleNode.Nodes) {   foreach (TreeListNode nc in n.Nodes)   { if (nc != _curParentNode) {   nc.CheckState = CheckState.Unchecked;   nc.DownRecursiveNode(nr => nr.CheckState = CheckState.Unchecked); }   } }  }  node.SyncNodeCheckState(checkState);  node.CheckState = checkState;}}/// <summary>/// 向上递归，获取符合条件的节点的公共父节点/// </summary>/// <param name="node">操作节点</param>/// <param name="checkHanlder">委托</param>/// <returns>符合条件的节点</returns>public static TreeListNode GetPublicParentNode(this TreeListNode node, Predicate<TreeListNode> checkHanlder){  TreeListNode _publicPNode = null;  TreeListNode _findNode = node.GetParentNode(checkHanlder);//先获取到条件判断的自身父节点  if (_findNode != null)  { //开始向上递归 UpwardRecursiveNode(_findNode, n => {   TreeListNode _curpublicNode = n.ParentNode;//获取当前向上递归的父节点   if (_curpublicNode != null)   { if (_curpublicNode.Nodes.Count > 1)//若有多个子节点，则是公共父节点 {   _publicPNode = _curpublicNode;   return false;//跳出递归 }   }   return true;//继续递归 });  }  return _publicPNode;}/// <summary>/// 向上递归，获取符合条件的父节点/// </summary>/// <param name="node">需要向上递归的节点</param>/// <param name="conditionHanlder">判断条件【委托】</param>/// <returns>符合条件的节点【TreeListNode】</returns>public static TreeListNode GetParentNode(this TreeListNode node, Predicate<TreeListNode> conditionHanlder){  TreeListNode _parentNode = node.ParentNode;//获取上一级父节点  TreeListNode _conditonNode = null;  if (_parentNode != null)  { if (conditionHanlder(_parentNode))//判断上一级父节点是否符合要求 {   _conditonNode = _parentNode; } if (_conditonNode == null)//若没有找到符合要求的节点，递归继续   _conditonNode = GetParentNode(_parentNode, conditionHanlder);  }  return _conditonNode;}

TreeListNode _node = e.Node;_node.SyncMutexNodeCheckState(_node.CheckState, n => n.GetNodeType() == NodeType.Cab);