Query selected dimension members (tostring) - mdx

Question

I wonder if this is possible. I want to create a calculated member that will show which dimension member is selected by a user. This member could then be used as a string to build responsive report titles (in PowerBI likely).
I've played with NAME, UNIQUENAME along with CURRENTMEMBER and such, but didn't get far, honestly I barely know where to start or if it's even possible.
For example. Say I have a country and city dimension to filter a host of measures and the user filters by "United States" and chooses a city (or three). I'd like to be able to retrieve "United States" as well as which cities were selected as a string and add it to a report title possibly to get a title like "Population stats for " city, city, city, " in ", country.

Answer 1

You sort of do that, take a look at how i print my slicer axis. Currentmember works when one value is used in your case you may want multiple values.
with member measures.Country
as
(existing [Customer].[Country].members).item(1).name
member measures.City
as
SetToStr(existing [Customer].[City].[City].members)
select
{[Measures].[Internet Sales Amount],measures.Country,measures.City }
on columns,
[Product].[Category].[Category]
on rows
from
[Adventure Works]
where
([Customer].[Country].&[United States],
{[Customer].[City].&[Chicago]&[IL],[Customer].[City].&[Denver]&[CO],[Customer].[City].&[Los Angeles]&[CA],[Customer].[City].&[New York]&[NY]}
)
Result