reporting services - SSRS Expression Divide by Zero Error

Question

I have a tablix box that has a division expression. When dividing by zero or nulls I get #Error displayed in my report. I tried to create an IIF statement and tested with static values. This verified my syntax was correct but I still see the error on my reports.

=IIF(Sum(Fields!CY_Dollars.Value)=0, 0, (Sum(Fields!CY_Dollars.Value) - Sum(Fields!PY_Dollars.Value))/(Sum(Fields!PY_Dollars.Value)))

So I'm taking Current year dollars, subtracting Previous year dollars, and dividing that total by previous year dollars to get the percentage change. Is there a trick to this that I'm not getting?!

Answer 1

You can add a function to your report code that handles the divide by zero condition, this makes it a bit easier to implement in multiple cells, e.g.

Public Function Divider (ByVal Dividend As Double, ByVal Divisor As Double)
If IsNothing(Divisor) Or Divisor = 0
  Return 0
Else
  Return Dividend/Divisor
End If
End Function 

You can then call this in a cell like so:

=Code.Divider(Fields!FieldA.Value, Fields!FieldB.Value)