DevExpress控件TreeList的复选框 .

DevExpress的TreeList要想在节点前面显示复选框,得修改属性OptionsView->ShowCheckBoxes=True

复选框的子节点与父节点统一的规则有:

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 treeList1_AfterCheckNode(object sender, NodeEventArgs e) {
            SetCheckedChildNodes(e.Node, e.Node.CheckState);
            SetCheckedParentNodes(e.Node, e.Node.CheckState);
        }
        private void treeList1_BeforeCheckNode(object sender, CheckNodeEventArgs e) {
            e.State = (e.PrevState == CheckState.Checked ? CheckState.Unchecked : CheckState.Checked);
        }
        private void SetCheckedChildNodes(TreeListNode node, CheckState check) {
            for(int i = 0; i < node.Nodes.Count; i++) {
                node.Nodes[i].CheckState = check;
                SetCheckedChildNodes(node.Nodes[i], check);
            }
        }
        private void SetCheckedParentNodes(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);
            }
        }

 private void GetCheckedID(TreeListNode parentNode)
        {
            if (parentNode.Nodes.Count == 0)
            {
                return;//递归终止
            }


            foreach (TreeListNode node in parentNode.Nodes)
            {
                if (node.CheckState == CheckState.Checked)
                {
                    DataRowView drv = treeList1.GetDataRecordByNode(node) as DataRowView;//关键代码
                    if (drv != null)
                    {
                        int GroupID= (int)drv["GroupID"];
                        lstCheckedOfficeID.Add(GroupID);
                    }


  private void btnOK_Click(object sender, EventArgs e)
        {
            
           
            this.lstCheckedOfficeID.Clear();


            if (treeList1.Nodes.Count > 0)
            {
                foreach (TreeListNode root in treeList1.Nodes)
                {
                    GetCheckedOfficeID(root);
                }
            }


            string idStr = string.Empty;
            foreach (int id in lstCheckedOfficeID)
            {
                idStr += id + " ";
            }


        }

                }
                GetCheckedOfficeID(node);
            }
        }