How would you fix this expression?

[#1]

The expression is for a dimension. There is a list box which the user selects his desired Dimension. I didn't know else to get the dimension to change according to this list box.

=if([Dimension 1]='Campaign', Campaign,

if([Dimension 1]='Date', Date,

if([Dimension 1]='Department Name', [Department Name],

if([Dimension 1]='Domain', Domain,

if([Dimension 1]='Market', Market,

if([Dimension 1]='Weekday', WeekDay, Null()

))))))

[swuehl]

Maybe like

=$(=only([Dimension 1]))