Formatting of row based on cell value

[Felice]

I am trying to get rows where the filed "Cost" does not have any value, formatted in red.
So far I have tried in several ways but the one that I thing should be closer to the right one is stye following applied to the detailed section of the report:

Expression: Field.Cost
Operator:      =
Value:           =" "

I also tried with value: = Null

but I get errors in the report and no formatting! 
The error I am getting is in the attached picture, however it says "Cannot perform = operation on System.Double and System.String. Same with "Like"
What should I do to get this expression correct?

Thanks,
Felice

[Stef]

Hi Felice,

Please use the approach for comparing to Null illustrated in the Conditional formatting of null string value forum thread. Is Null can be used with integer fields as well.


Regards,
Stef
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