reporting services - SSRS Multi Value Parameter. Check whether "Select All" is selected

Question

I have a multi value parameter in my SSRS Report. I want to find out whether (Select All) is checked in that parameter.

In other words, whether all the values in the parameter are checked or only some values are checked.

Is it possible?

I am able to find out number of selected values through Parameters!Parameter.Count. Is there a way to find out total of items in that parameter?

Answer 1

In case anyone is still having issues doing this, I just coded this easy fix.

=IIF(COUNTROWS("dataset").Equals(Parameters!parameter.Count),"it is equal","this is not equal")