Cascading filter not working in CSV Datasource - Sap design studio 1.6

Hi All,

I have tried to create cascading filter using Dropdown box in Sap Design studio 1.6 version (Local connectivity).

Using Query as a datasource filters worked as expected, same code dint work with csv Datasources.

Steps Followed:

1> Created three Dropdown box ( Region; Country; LE)

2> on Startup of Application, added below scripts:

DROPDOWN_1.setItems(DS_1.getMemberList("GWCOMPPL__ZP_REGION", MemberPresentation.INTERNAL_KEY, MemberDisplay.TEXT, 20));

DROPDOWN_2.setItems(DS_1.getMemberList("GWCOMPPL__0COUNTRY", MemberPresentation.INTERNAL_KEY, MemberDisplay.TEXT, 30));

DROPDOWN_3.setItems(DS_1.getMemberList("0COMP_CODE", MemberPresentation.INTERNAL_KEY, MemberDisplay.KEY, 30));

3> On Select of First dropdown, Added below script:

DS_1.setFilter("GWCOMPPL__ZP_REGION", DROPDOWN_1.getSelectedValue());

DROPDOWN_2.setItems(DS_1.getMemberList("GWCOMPPL__0COUNTRY", MemberPresentation.INTERNAL_KEY, MemberDisplay.TEXT, 30)

do we need to add any other function for csv Datasource?

Thanks,
Jaya