Reporting Services - hide table column based upon report parameter

Question

I have a report in Reporting Services 2005, and I want to hide or show a single table column based upon a report parameter. Does anyone have any idea how to do that?

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Answer 1

To make a null column disappear,

Right-Click column to select Column Visibility, then Set expression for Hidden:

IIF(IsNothing(Fields!FieldName.Value),True,False)

Answer 2

For some of my reports I've set the Visibility (Specifically the Hidden property) for the column to:

=IsNothing(Fields!Site.Value)

Note that this only works if the relevant field can be null in the underlying dataset, otherwise you will see the blank column.