Devexpress TreeList控件的相关操作

/// <summary>
        /// 获取整棵树的所有选中的节点
        /// </summary>
        /// <param name="treeList"></param>
        /// <returns></returns>
        private List<DNode.TreeListNode> GetSelectedNodes(DevExpress.XtraTreeList.TreeList treeList)
        {
            List<DNode.TreeListNode> sNodes = new List<DNode.TreeListNode>();
            List<DNode.TreeListNode> allNodes = GetAllNode(treeList);
            foreach(DNode.TreeListNode node in allNodes)
            {
                if (node.Checked)
                    sNodes.Add(node);
            }
            return sNodes;
        }

　　

/// <summary>
        /// 获取node节点及其子孙节点的数据
        /// </summary>
        /// <param name="node"></param>
        /// <param name="list"></param>
        private void GetAllDescendantData(DevExpress.XtraTreeList.Nodes.TreeListNode node, ref List<ObjectPermissionItem> list)
        {
            ObjectPermissionItem data = treeList1.GetDataRecordByNode(node) as ObjectPermissionItem;
            if (data != null)
                list.Add(data);
            if (node.Nodes.Count > 0)
            {
                foreach (DevExpress.XtraTreeList.Nodes.TreeListNode cnode in node.Nodes)
                    GetAllDescendantData(cnode, ref list);
            }
        }

　　

/// <summary>
        /// 获取treeList的所有节点
        /// </summary>
        /// <param name="treeList"></param>
        /// <returns></returns>
        private List<DevExpress.XtraTreeList.Nodes.TreeListNode> GetAllNode(DevExpress.XtraTreeList.TreeList treeList)
        {
            List<DevExpress.XtraTreeList.Nodes.TreeListNode> allNodes = new List<DevExpress.XtraTreeList.Nodes.TreeListNode>();
            foreach(DevExpress.XtraTreeList.Nodes.TreeListNode node in treeList.Nodes)
            {
                allNodes.Add(node);
                List<DNode.TreeListNode> cnode = new List<DNode.TreeListNode>();
                DoGetNodes(ref cnode, node);
                allNodes.AddRange(cnode);
            }
            return allNodes;
        }

　　

/// <summary>
        /// 递归获取parentNode节点的所有子孙节点
        /// </summary>
        /// <param name="list"></param>
        /// <param name="parentNode"></param>
        private void DoGetNodes(ref List<DevExpress.XtraTreeList.Nodes.TreeListNode> list,DevExpress.XtraTreeList.Nodes.TreeListNode parentNode)
        {
            foreach(DNode.TreeListNode node in parentNode.Nodes)
            {
                list.Add(node);
                if(node.Nodes.Count>0)
                {
                    DoGetNodes(ref list, node);
                }
            }
        }

　　

/// <summary>  
        /// 设置子节点的状态  
        /// </summary>  
        /// <param name="node"></param>  
        /// <param name="check"></param>  
        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);
            }
        }

        /// <summary>  
        /// 设置父节点的状态  
        /// </summary>  
        /// <param name="node"></param>  
        /// <param name="check"></param>  
        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;
                    }
                }
                node.ParentNode.CheckState = b ? CheckState.Indeterminate : check;
                SetCheckedParentNodes(node.ParentNode, check);
            }
        }  

　　

/// <summary>
        /// 点击一个节点，刷新其子节点和父节点的选中状态
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void treeList1_AfterCheckNode(object sender, DevExpress.XtraTreeList.NodeEventArgs e)
        {
            SetCheckedChildNodes(e.Node, e.Node.CheckState);
            SetCheckedParentNodes(e.Node, e.Node.CheckState);  
        }