dev TreeList 节点联动

1：正确方法

只需要设置属性即可  treeList1.OptionsBehavior.AllowRecursiveNodeChecking = true;

2：编程实现方法：

//1、选择某一节点时,该节点的子节点全部选择
        //2、取消某一节点时,该节点的子节点全部取消选择
        //3、某节点的子节点全部选择时,该节点选择
        //4、某节点的子节点未全部选择时,该节点不选择

        private void treeMenus_BeforeCheckNode(object sender, DevExpress.XtraTreeList.CheckNodeEventArgs e)
        {
            if (e.PrevState == CheckState.Checked)
            {
                e.State = CheckState.Unchecked;
            }
            else
            {
                e.State = CheckState.Checked;
            }
        }

        private void treeMenus_AfterCheckNode(object sender, DevExpress.XtraTreeList.NodeEventArgs e)
        {
            SetCheckedChildNodes(e.Node, e.Node.CheckState);
            SetCheckedParentNodes(e.Node, e.Node.CheckState);
        }


        #endregion

#region TreeList 操作共同

        #region 设置子节点状态  
        private void SetCheckedChildNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check)
        {
            for (int i = 0; i < node.Nodes.Count; i++)
            {
                node.Nodes[i].CheckState = check;
                SetCheckedChildNodes(node.Nodes[i], check);
            }
        }
        #endregion

        #region 设置父节点状态  
        private void SetCheckedParentNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check)
        {
            if (node.ParentNode != null)
            {
                bool b = false;
                CheckState state;
                for (int i = 0; i < node.ParentNode.Nodes.Count; i++)
                {
                    state = (CheckState)node.ParentNode.Nodes[i].CheckState;
                    if (!check.Equals(state))
                    {
                        b = !b;
                        break;
                    }
                }
                if (b)
                {
                    node.ParentNode.CheckState = CheckState.Indeterminate;
                }
                else
                {
                    node.ParentNode.CheckState = check;
                }
                SetCheckedParentNodes(node.ParentNode, check);
            }
        }
        #endregion

        #endregion