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 th

Answer 1

I also faced this problem and I solved it this way.

I have one multivalued parameter named "Carrier". Then I have added one parameter "CarrierHidden" which is same as "Carrier" only thing is I made its Visibility as Hidden.

="Carrier=" & Switch(Parameters!CarrierHidden.Count = Parameters!Carrier.Count, "All",
 Parameters!Carrier.Count > 1 And Parameters!CarrierHidden.Count > Parameters!Carrier.Count, "Multi",
 Parameters!Carrier.Count = 1, Parameters!Carrier.Label(0))