c# 后台绑定treeview 多个tab

<wijmo:C1Tabs ID="C1Tab1" runat="server" ><%--OnSelectedChanged="" AutoPostBack="true" --%>
                           
        <Pages><wijmo:C1TabPage id="C1TabPage0" runat="server" ><wijmo:C1TreeView id="tabstree0" AllowTriState="false" runat="server"></wijmo:C1TreeView></wijmo:C1TabPage>

</Pages>
            </wijmo:C1Tabs>

        string str= "SELECT [a],[b] FROM  [表名] ";
        DataTable dtOil = DbHelper.DAL.ExecuteDataSet(str).Tables[0]; 
        tree1(dtOil, "");

　　　　　public void tree1(DataTable dtOil, string name)
        {
            string role = "select u.DisplayName from (select ur.UserID from (select RoleID from roles where RoleName='厂家' ) as r left join userroles ur on r.RoleID=ur.RoleID) as us left join users u on u.UserID=us.UserID where u.DisplayName like '%" + name + "%'";
            DataTable dtrole = DbHelper.DAL.DataTable(role);
            C1Tab1.Pages.Clear();
            for (int i = 0; i < dtrole.Rows.Count; i++)
            {
//tab绑定
                C1.Web.Wijmo.Controls.C1Tabs.C1TabPage ctab = new C1.Web.Wijmo.Controls.C1Tabs.C1TabPage();
                ctab.ID = "C1TabPage" + i + "";
                ctab.Text = dtrole.Rows[i][0].ToString();
                C1TreeView c1 = new C1TreeView();
                c1.ID = "tabstree" + i.ToString();

                ctab.Controls.Add(c1);
                C1Tab1.Pages.Add(ctab);
            }
            for (int i = 0; i < dtrole.Rows.Count; i++)
            {
数据绑定
                if (i == 0)
                {
                    treeValues = "";
                }
                else
                {
                    treeValues += "&";
                }
                C1TreeView c1 = (C1TreeView)C1Tab1.Pages[i].Controls[0];
                c1.ShowCheckBoxes = true;
                c1.ShowExpandCollapse = true;
                string strchangjia = "SELECT * from (SELECT [a],[b] FROM  [表名] where [treeType] = '1' and 品牌  like '%[0-9]%' group by [a],[b]) as jiu where jiu.alike '%" + dtrole.Rows[i][0].ToString().Replace(" ", "") + "%'";
                DataTable dchangjia = GJPDbHelper.DAL.DataTable(strchangjia);
                BindTreeOil2(dchangjia, c1);
                count++;
            }
        }

private C1TreeView BindTreeOil2(DataTable dtSource, C1TreeView c)
        {

            c.Nodes.Clear();

            string topNodeStr = "";
            string twoNodeStr = "";
            C1TreeViewNode curNode = new C1TreeViewNode(); ;
            //DataRow[] rows = dtSource.Select(string.Format("ParentID={0}", parentID));
            foreach (System.Data.DataRow c1row in dtSource.Rows)
            {
                if (topNodeStr != Convert.ToString(c1row[0]))
                {
                    C1TreeViewNode newNode = new C1TreeViewNode();
                    newNode.Value = Convert.ToString(c1row[0]);
                    newNode.Text = Convert.ToString(c1row[0]);

                    c.Nodes.Add(newNode);
                    
                    topNodeStr = Convert.ToString(c1row[0]);
                    curNode = newNode;
                }
                else
                {
                    C1TreeViewNode newNode = new C1TreeViewNode();
                    newNode.Value = Convert.ToString(c1row[1]);
                    newNode.Text = Convert.ToString(c1row[1]);
                    //string str = "select 产品 from [AIRB_MMTREE] where [类型] ='" + c1row[1].ToString() + "'";
                    //DataTable dt = GJPDbHelper.DAL.DataTable(str);
                    //for (int i = 0; i < dt.Rows.Count; i++)
                    //{
                    //    C1TreeViewNode newNode1 = new C1TreeViewNode();
                    //    newNode1.Value = Convert.ToString(dt.Rows[i][0]);
                    //    newNode1.Text = Convert.ToString(dt.Rows[i][0]);
                    //    newNode.Nodes.Add(newNode1);
                    //}
                        //if (twoNodeStr != Convert.ToString(c1row[1]))
                        //{
                        //    C1TreeViewNode newNode1 = new C1TreeViewNode();
                        //    newNode1.Value = Convert.ToString(c1row[1]);
                        //    newNode1.Text = Convert.ToString(c1row[1]);
                        //    newNode.Nodes.Add(newNode1);
                        //    twoNodeStr = Convert.ToString(c1row[1]);
                        //    newNode = newNode1;
                        //}
                        //else
                        //{
                        //    C1TreeViewNode newNode1 = new C1TreeViewNode();
                        //    newNode1.Value = Convert.ToString(c1row[2]);
                        //    newNode1.Text = Convert.ToString(c1row[2]);
                        //    newNode.Nodes.Add(newNode1);
                        //}

                        curNode.Nodes.Add(newNode);

                }
            }
            return c;
        }