Compare field values to string works but compare to SelectedValue function does not

[GGergely]

I have a table that contains countries.

There is another table with the same countries but used only to filter the first table, no relationship between them.

Now I would like to create a new column which indicates if a country is being selected or not. It works fine when I specify the country name but it does not work when I use the SELCTEDVALUE function which gives the same country that I specified. 

SelectedCountry measure = SELECTEDVALUE(Country_Slicer[Select_a_Country])

I am confused. Can someone please explain why SELECTEDVALUE() --> Germany is not the same as "Germany"?

[nandukrishnavs · Accepted solution]

@GGergely 

We can't pass filter selection to the calculated column. We have to create a DAX measure. 

IsSelected =
IF (
    SELECTEDVALUE ( Countries[Country] )
        = SELECTEDVALUE ( CountriesSlicer[Country] ),
    1,
    0
)

[GGergely]

Yep, that works, thank you for the help and also for saving my nerves.