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();}