Report Builder: Need help to exclude certain sample type from expression parameters

Question

I am almost there with a custom template where I just now need some help for the expression to exclude a certain sample type for the "Result" parameter.

I don't want the "> 1%" or "< 1%" to apply to sample type "Cal." I just want this to be left blank in this column. The current expression for the "Result" column:

import System
import clr
clr.AddReference("System.Drawing")
import System.Drawing

"" if BoundItems["TargetPeak"] is None or BoundItems["TargetPeak"].IsFinalConcentrationNull() else "< 1%" if BoundItems["TargetPeak"].FinalConcentration < 0.050 else "> 1%"

From what I've been able to discern from the schema, this is the relevant term:

Calibration *//SampleType[.='Calibration']

How do I put this into this current expression to exclude it from the expression parameters? Or do I go the opposite way and only include sample types "QC," "Blank," "Sample?"

Thank you for any help!

howard_sanford · Answer

Hello Ziaz , 
 Adding the SampleType check into the initial part of your expression should work. As far as I know SampleType cannot be blank, so you should just be able to check for its value. Try something like this - 
 "" if BoundItems["Sample"].SampleType=="Calibration" or BoundItems["TargetPeak"] is None or BoundItems["TargetPeak"].IsFinalConcentrationNull() else "< 1%" if BoundItems["TargetPeak"].FinalConcentration < 0.050 else "> 1%" 
 Where "Sample" is the binding name for the sample.