how can i implement a list view instead of the rollbase grid in my portal page , please?
Abir, if you are referring to Kendo ListView widget; it is not supported OOB.
Starting Release 4.2, you can choose to add kendo libraries by default to portal page. Prior to that kendo libraries are not explicitly loaded for portal pages unless user adds script & css references themselves.
Even for 4,2, users will have to use server-side api to fetch data and render the same using kendo controls by adding script components to portal pages.