private void XtraUserControlBlankList_Load(object sender, EventArgs e)        {            this.BlankTreeList.Columns.Clear();            TreeListColumn tc1 = new TreeListColumn();            tc1.Name = "treeListColumn1";            tc1.FieldName = "BlankID";            tc1.Caption = "主键ID";            tc1.VisibleIndex = 0;//此为必须设置的属性，否则无法显示列            TreeListColumn tc2 = new TreeListColumn();            tc2.FieldName = "BlankName";            tc2.Caption = "行名";            tc2.VisibleIndex = 1;            TreeListColumn tc3 = new TreeListColumn();            tc3.Caption = "父级ID";            tc3.FieldName = "ParentId";            tc3.VisibleIndex = 2;            this.BlankTreeList.Columns.AddRange(new TreeListColumn[] { tc1, tc2, tc3});            //清空现有节点            this.BlankTreeList.Nodes.Clear();            BlankTreeList.AppendNode(new object[] {
   "Allblanklist","全部"}, null);            //根据节点的字段ID名称查找定位节点            TreeListNode node = this.BlankTreeList.FindNodeByFieldValue("BlankID", "Allblanklist"); //在filedName列中查找所属值得的节点            DataTable dt = blankBll.GetBlankList();            DataView dv = new DataView(dt);            dv.RowFilter = "ParentId = '-1'";            if (dt.Rows.Count > 0)            {                foreach (DataRowView dv1 in dv)                {                    object[] nodeview = { dv1["BlankID"], dv1["BlankName"], dv1["ParentId"] };                    TreeListNode tn = BlankTreeList.AppendNode(nodeview, node);                    GetChild(dv1["BlankID"].ToString(),dt,tn);//参数(父级ID,DataTable表,父节点)                }            }            node.ExpandAll();        }

 

private void GetChild(string upnode, DataTable dt,TreeListNode tn)        {            try            {                DataView dv = new DataView(dt);                dv.RowFilter = "ParentId = '" + upnode + "'";                foreach (DataRowView dv1 in dv)                {                    object[] nodeview = { dv1["BlankID"], dv1["BlankName"], dv1["ParentId"] };                    TreeListNode childnode = BlankTreeList.AppendNode( nodeview , tn);                    GetChild(dv1["BlankID"].ToString(), dt, childnode);//参数(父级ID,DataTable表,父节点)                }            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }

 

private void BlankTreeList_FocusedNodeChanged_1(object sender, FocusedNodeChangedEventArgs e)        {            TreeListNode curNode = e.Node;            if (curNode == null) return;            TxtE1.Text = curNode.GetValue("BlankID").ToString();        }