这篇文章主要介绍了DevExpress实现TreeList父子节点CheckState状态同步的方法,需要的朋友可以参考下
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);
- }
- }
复制代码
代码运行效果如下图所示:
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