要求如下:
1:选择父节点后,子节点全部打钩;
2:选择子节点而不选择父节点,则从当前节点的父节点一直到根节点check框都是半选状态。
3:当子节点均未勾选时,设置父节点状态为:未选中状态
具体实现如下:
一、OptionView—ShowCheckBoxes属性为true,则每个节点前面自动增加一个check框。
二、设置OptionBehavior—AllIndeterminateCheckState属性为true,则check框可以出现半选状态。
具体代码显示如下:
- #region 树形 点击节点前
- /// <summary>
- /// 点击节点前
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void treeList_BeforeCheckNode(object sender, CheckNodeEventArgs e)
- {
- if (!this.ifMultipleChoice)
- {
- //选择前取消前面已经选择的,实现单选功能
- List<DevExpress.XtraTreeList.Nodes.TreeListNode> treeListNodes = treeList.GetAllCheckedNodes();
- foreach (DevExpress.XtraTreeList.Nodes.TreeListNode node in treeListNodes)
- {
- node.Checked = false;
- }
- }
- e.State = (e.PrevState == CheckState.Checked ? CheckState.Unchecked : CheckState.Checked);
- }
- #endregion
- #region 树形 点击节点后
- /// <summary>
- /// 点击节点后
- /// </summary>
- /// <param name="sender"></param>
- /// <param name="e"></param>
- private void treeList_AfterCheckNode(object sender, NodeEventArgs e)
- {
- if (!this.ifMultipleChoice)
- {
- return;
- }
- if (e.Node == null)
- {
- return;
- }
- if (e.Node.CheckState == CheckState.Indeterminate)
- {
- e.Node.CheckState = CheckState.Checked;
- }
- if (e.Node.CheckState == CheckState.Checked)
- {
- if (e.Node.HasChildren)
- {
- this.CheckNode(e.Node);
- }
- this.ValidParentIsChecked(e.Node);
- }
- else if (e.Node.CheckState == CheckState.Unchecked)
- {
- if (e.Node.HasChildren)
- {
- this.SetCheckedChildNodes(e.Node, CheckState.Unchecked);
- }
- //从根节点往下 查询 是否有打钩的子节点,如果有那么 父节点的 半选状态不变 否则变为 不选择状态
- //this.ValidParentNodeIsCanleSel(e.Node);
- SetCheckedParentNodes(e.Node, e.Node.CheckState);
- }
- }
- #endregion
- #region 树形 节点操作集合
- /// <summary>
- /// 选择某个节点及其子节点
- /// </summary>
- /// <param name="node"></param>
- private void CheckNode(DevExpress.XtraTreeList.Nodes.TreeListNode node)
- {
- foreach (DevExpress.XtraTreeList.Nodes.TreeListNode cnode in node.Nodes)
- {
- if (cnode != null)
- {
- cnode.CheckState = CheckState.Checked;
- }
- if (cnode.HasChildren)
- {
- CheckNode(cnode);
- }
- }
- }
- /// <summary>
- /// 勾选子节点后,修改父节点的状态
- /// </summary>
- /// <param name="node"></param>
- private void ValidParentIsChecked(DevExpress.XtraTreeList.Nodes.TreeListNode node)
- {
- if (node.ParentNode != null)
- {
- //父节点未被选中
- if (node.ParentNode.CheckState == CheckState.Unchecked)
- {
- //该节点有子节点 并且 该节点与子节点均被选中
- if (node.HasChildren && ValidIsCheckAllChildNode(node.ParentNode))
- {
- node.ParentNode.CheckState = CheckState.Checked;
- }
- //该节点没有子节点 并且 其父节点下的子节点均被选中
- else if ((!node.HasChildren) && ValidIsCheckAllChildNode(node.ParentNode))
- {
- node.ParentNode.CheckState = CheckState.Checked;
- }
- else
- {
- node.ParentNode.CheckState = CheckState.Indeterminate;
- }
- }
- else if (node.ParentNode.CheckState == CheckState.Indeterminate)
- {
- //该节点有子节点并且 子节点均未被选中时,修改其状态
- if (node.HasChildren && (!this.ValidIsHasCheckChildNode(node)))
- {
- node.ParentNode.CheckState = CheckState.Unchecked;
- }
- // 该节点的父节点下所有节点均被选中 ValidIsCheckAllChildNode
- else if (ValidIsCheckAllChildNode(node.ParentNode))
- {
- node.ParentNode.CheckState = CheckState.Checked;
- }
- }
- this.ValidParentIsChecked(node.ParentNode);
- }
- }
- /// <summary>
- /// 从该节点往下 查询 是否有打钩的子节点,如果有那么 父节点的 半选、选中状态不变否则变为 不选择状态
- /// </summary>
- /// <param name="node"></param>
- private void ValidParentNodeIsCanleSel(DevExpress.XtraTreeList.Nodes.TreeListNode node)
- {
- bool isSel = false;
- if (node.ParentNode != null)
- {
- if (node.ParentNode.CheckState == CheckState.Indeterminate)
- {
- //如果父节点的 状态为 半选 状态 这 根据父节点 判断子节点是否打钩
- isSel = ValidIsHasCheckChildNode(node.ParentNode);
- if (isSel == false)
- {
- //如果所有的 子节点 都没有 “选中”那么 父节点的状态 变为 非选中状态
- node.ParentNode.CheckState = CheckState.Unchecked;
- }
- }
- this.ValidParentNodeIsCanleSel(node.ParentNode);
- }
- }
- /// <summary>
- /// 判断该节点下是否有节点被选中,如果有返回true
- /// </summary>
- /// <param name="node"></param>
- /// <returns></returns>
- private bool ValidIsHasCheckChildNode(DevExpress.XtraTreeList.Nodes.TreeListNode node)
- {
- bool isCheck = false;
- foreach (DevExpress.XtraTreeList.Nodes.TreeListNode cnode in node.Nodes)
- {
- if (cnode != null)
- {
- if (cnode.CheckState == CheckState.Checked)
- {
- isCheck = true;
- return isCheck;
- }
- }
- if (cnode.HasChildren)
- {
- isCheck = this.ValidIsHasCheckChildNode(cnode);
- if (isCheck == true)
- {
- return isCheck;
- }
- }
- }
- return isCheck;
- }
- /// <summary>
- /// 节点全选
- /// </summary>
- /// <param name="node"></param>
- /// <returns></returns>
- private bool ValidIsCheckAllChildNode(DevExpress.XtraTreeList.Nodes.TreeListNode node)
- {
- bool isCheck = true;
- foreach (DevExpress.XtraTreeList.Nodes.TreeListNode cnode in node.Nodes)
- {
- if (cnode != null)
- {
- if (cnode.CheckState == CheckState.Unchecked)
- {
- isCheck = false;
- return isCheck;
- }
- }
- if (cnode.HasChildren)
- {
- isCheck = this.ValidIsCheckAllChildNode(cnode);
- if (isCheck == false)
- {
- return isCheck;
- }
- }
- }
- return isCheck;
- }
- #endregion
- #region 树形 获取全部子节点
- private void GetChildNodes(TreeListNode parentNode, List<TreeListNode> list)
- {
- if (parentNode == null)
- {
- return;
- }
- if (parentNode.Nodes.Count > 0)
- {
- foreach (TreeListNode node in parentNode.Nodes)
- {
- list.Add(node);
- if (node.Nodes.Count > 0)
- {
- GetChildNodes(node, list);
- }
- }
- }
- }
- #endregion
- #region 树形 选择子节点时触发
- /// <summary>
- /// 选择子节点时触发
- /// </summary>
- /// <param name="node"></param>
- /// <param name="check"></param>
- private void SetCheckedChildNodes(TreeListNode node, CheckState check)
- {
- foreach (TreeListNode tn in node.Nodes)
- {
- tn.CheckState = check;
- if (tn.HasChildren)
- {
- SetCheckedChildNodes(tn, check);
- }
- }
- }
- #endregion
- #region 树形 选择父节点时触发
- /// <summary>
- /// 选择父节点时触发
- /// </summary>
- /// <param name="node"></param>
- /// <param name="check"></param>
- private void SetCheckedParentNodes(TreeListNode node, CheckState check)
- {
- if (node.ParentNode != null)
- {
- bool b = false;
- CheckState state;
- foreach (TreeListNode tln in node.ParentNode.Nodes)
- {
- state = (CheckState)tln.CheckState;
- if (!check.Equals(state))
- {
- b = !b;
- break;
- }
- }
- node.ParentNode.CheckState = b ? CheckState.Indeterminate : check;
- SetCheckedParentNodes(node.ParentNode, check);
- }
- }
- #endregion
- #region 树形 判断此节点下的所有孩子节点是否选中
- /// <summary>
- /// 判断此节点下的所有孩子节点是否选中
- /// </summary>
- /// <param name="node"></param>
- /// <returns></returns>
- private Boolean IsChildsChecked(TreeListNode node)
- {
- foreach (TreeListNode tln in node.ParentNode.Nodes)
- {
- if (tln.CheckState == CheckState.Unchecked)
- {
- return false;
- }
- if (tln.HasChildren)
- {
- IsChildsChecked(tln);
- }
- }
- return true;
- }
- #endregion