c#的treeview绑定和获取值的方法

private void BindData()
{
    this.tlOffice.DataSource = dtOffice;
    tlOffice.KeyFieldName = "OfficeID";
    //tlOffice.DataMember = "OfficeName";
    tlOffice.Columns["OfficeName"].Caption = "局名称";
    tlOffice.ParentFieldName = "ParentOfficeID";
}

/// <summary>
         /// 选择某一节点时,该节点的子节点全部选择  取消某一节点时,该节点的子节点全部取消选择
         /// </summary>
         /// <param name="node"></param>
         /// <param name="state"></param>
         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);
             }
         }

/// <summary>
         /// 某节点的子节点全部选择时,该节点选择   某节点的子节点未全部选择时,该节点不选择
         /// </summary>
         /// <param name="node"></param>
         /// <param name="check"></param>
         private void SetCheckedParentNodes(TreeListNode node, CheckState check)
         {
             if (node.ParentNode != null)
             {

                 CheckState parentCheckState = node.ParentNode.CheckState;
                 CheckState nodeCheckState;
                 for (int i = 0; i < node.ParentNode.Nodes.Count; i++)
                 {
                     nodeCheckState = (CheckState)node.ParentNode.Nodes[i].CheckState;
                     if (!check.Equals(nodeCheckState))//只要任意一个与其选中状态不一样即父节点状态不全选
                     {
                         parentCheckState = CheckState.Unchecked;
                         break;
                     }
                     parentCheckState = check;//否则（该节点的兄弟节点选中状态都相同），则父节点选中状态为该节点的选中状态
                 }

                 node.ParentNode.CheckState = parentCheckState;
                 SetCheckedParentNodes(node.ParentNode, check);//遍历上级节点
             }
         }

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

private List<int> lstCheckedOfficeID = new List<int>();//选择局ID集合
            /// <summary>
         /// 获取选择状态的数据主键ID集合
         /// </summary>
         /// <param name="parentNode">父级节点</param>
         private void GetCheckedOfficeID(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 = tlOffice.GetDataRecordByNode(node) as DataRowView;
                                          //关键代码，就是不知道是这样获取数据而纠结了很久(鬼知道可以转换为DataRowView啊)
                     if (drv != null)
                     {
                         int OfficeID = (int)drv["OfficeID"];
                         lstCheckedOfficeID.Add(OfficeID);
                     }

                    
                 }
                 GetCheckedOfficeID(node);
             }
         }

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

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

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