Expression for Row Visibility when FALSE is “” or NOTHING? (SSRS)

Question

I have the following expression in a cell:

=IIF(last(Fields!OpenedEmail.Value) >= (DateAdd(DateInterval.Day, -30, Parameters!end_date.Value)), last(Fields!OpenedEmail.Value), "")

I'm having problems figuring out what expression I need to put into the Row Visibility to get the row to disappear if "" or NOTHING is used for FALSE. I've tried combinations of IIF, SWITCH, and ISNOTHING but no dice.

Thoughts?

Answer 1

如果要在表达式为空白时隐藏行，则可以使用TRUE来隐藏当前具有空白的行：

=IIF(last(Fields!OpenedEmail.Value) >= (DateAdd(DateInterval.Day, -30, Parameters!end_date.Value)), False, True)