第三方控件DevExpress中ASPxNavBar1用法

 private void bindASPxNavBar()
    {
        DataTable dt = DB.FillDataTable_Pro("select item_clsname,item_clsno from bi_t_item_cls where item_flag=0 and len(item_clsno)=2");
        this.ASPxNavBar1.Groups.Clear();
        DevExpress.Web.ASPxNavBar.NavBarGroup group = new DevExpress.Web.ASPxNavBar.NavBarGroup();
        for (int i = 0; i < dt.Rows.Count; i++)
        {

           this.ASPxNavBar1.Groups.Add(dt.Rows[i][0].ToString(), dt.Rows[i][1].ToString());

       }
   
        for (int j = 0; j < this.ASPxNavBar1.Groups.Count; j++)
        {
            DataTable data = getwhere(this.ASPxNavBar1.Groups[j].Name);
            if(data!=null)
            {
            for (int h = 0; h < data.Rows.Count; h++)
            {
             
                    this.ASPxNavBar1.Groups[j].Items.Add(data.Rows[h][0].ToString(), data.Rows[h][1].ToString());
            

            }}

        }

    }

 private DataTable getwhere(string str)
    {
        DataTable data = DB.FillDataTable_Pro(string.Format("select item_clsname,item_clsno from bi_t_item_cls where item_flag=0 and item_clsno like '{0}%' and len(item_clsno)=4", str));
        if (data.Rows.Count != 0)
        {
            return data;
        }
        else
        {
            return null;
        }
    }