sql - Dynamic menu binding using oledb in asp.net -

if using sql server database in asp.net dynamic menu binding shows menus , submenus items on page.but on other side if use oracle database menu binding not shows menu items on page.it shows menu control blank @ run time

sql connectivity

try {     response.cache.setcacheability(httpcacheability.nocache);     dataset ds = new dataset();     string connstr = "server=webserver;uid=sa;pwd=sa;database=amit;";     using (sqlconnection conn = new sqlconnection(connstr))     {          string sql = "select menuid, subheadname, description, parentid, url menumaster typeno '%" + session["user_type"].tostring().trim() + "%' , prno not null";         sqldataadapter da = new sqldataadapter(sql, conn);         da.fill(ds);         da.dispose();     }      ds.datasetname = "menus";     ds.tables[0].tablename = "menu";     datarelation relation = new datarelation("parentchild",                                     ds.tables[0].columns["menuid"],                                     ds.tables[0].columns["parentid"], false);      relation.nested = true;     ds.relations.add(relation);     xmldatasource.data = ds.getxml(); } catch {     response.redirect("error.aspx"); } 

oracle connectivity

try     response.cache.setcacheability(httpcacheability.nocache)     dim constr string =          system.configuration.configurationmanager.connectionstring("connectionstring").connectionstring     dim ds dataset = new dataset()     using conn new oledbconnection(constr)         dim str string = "select menuid, subheadname,description, parentid,url dtl_menumaster prno not null order menuid"         dim da oledbdataadapter = new oledbdataadapter(str, conn)         da.fill(ds)         da.dispose()     end using      ds.datasetname = "menus"     ds.tables(0).tablename = "menu"     dim relation datarelation = new datarelation("parentchild",     ds.tables(0).columns("menuid"),     ds.tables(0).columns("parentid"), true)      relation.nested = true     ds.relations.add(relation)     xmldatasource.data = ds.getxml() catch ex exception  end try