if i don´t select a month or year i want my expression to be labeled as previous month and current year (May 2012). if i select now may, it should be labeled as April 2012. I tried the following expression, but the else statement isn´t working:
='Umsatz ' &
if(GetSelectedCount(Month)=0, Monthname(Today()-31), only(Month)-1 and only(Year)-1)
with today(), it´s not flexible anymore. again, it´s about the lable not the calculation expression. and if i select nothing, the result must currently be: May 2012. if i select e.g. may 2012, it must be april 2012.
if i select november 2011 it must show october 2011. always one month backwards. thanks for helping!