I want to filter out the output without rows containing null values or blank columns. I am using Sql server 2012 there is no option named \'Blank\' as in SS
Set the expression to:
=IsNothing(Fields!YourFieldHere.Value)
Set the type to "Boolean" (see screenshot below) otherwise you'll get a "cannot compare data of types boolean and string" error.
false
This works for filtering both rows and groups.