I have two date fields in my xlsform. I would like to show an error message when the user leaves either of the date fields blank or when the user enters a date in the second date field which is less than the date entered in the first date field.
How can I construct my contraint and contraint message columns?
One constraint expression can only have one constraint message. It should be possible to have separate note fields below the nodes of interest that are made relevant based on a subset of the original compound expression.
You could try:
Date 1: not empty
Date 2: not empty and >= Date1
You can have your constraint expressions remain as is and leave the constraint message empty (for the date fields).
Note 1: Show if either Date 1 or Date 2 is empty
Note 2: Show if Date 2 < Date 1
You could style the note texts and have them appear in red and bold.