Q:

Hide ssrs textbox based on another textbox value

I am trying to hide a textbox based on another textbox value in a table.  In my ssrs 2013 report, I have a column in a table called EmpExist that returns nothing or text like Emp does not exist.  On top of the table I have a textbox called Go To when clicked it will take you to another report.  I am trying to hide this textbox based on EmpExist column in the table. 
I tried the following, setting the visibility of "Go To": 
=IIF(ReportItems!EmpExist. Value = "" OR ReportItems!EmpExist. Value IS NOTHING, False, True)

or this:
=IIF(First(Fields!EmpExist. Value, "dataset1") IS NOTHING OR First(Fields!EmpExist. Value, "dataset1") = "", False, True)

The problem is that the Go To textbox will be either visible or hidden regardless of the EmpExist value.  If the EmpExist has any value, "Go To" should be hidden, but it is visible.  If it does not have any value or nothing, it should display it but it is visible as well. 
 Thanks. 

A:

I ended up using a parameter to check the value of EmpExist and used the expression above (using the parameter instead of the column name) and seems to be working fine.  Not sure why I was not able to do it based on textbox value in SSRS 2013

