How do I set the visibility of a text box in SSRS using an expression?

Question

I have a subtotal field for a calculated column that I want to hide when my report has not ran yet because on days with no data it shows up as NaN on the report

Answer 1

instead of this

=IIf((CountRows("ScannerStatisticsData")=0),False,True)

write only the expression when you want to hide

CountRows("ScannerStatisticsData")=0

or change the order of true and false places as below

=IIf((CountRows("ScannerStatisticsData")=0),True,False)

because the Visibility expression set up the Hidden value. that you can find above the text area as

" Set expression for: Hidden "