[DevExpress][TreeList]父子节点CheckState状态同步

关键代码:

        /// <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);

            }

        }

代码效果:

image

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