Set a default value on each box and set it to the corresponding node from the secondary data connection, but filter each according to the selection in the dropdown. The statement is like this:
"ClockIn(SPList) where BusRoute(SPList) is equal to BusRoute(IPForm)"
- You click the fx button next to the default value field for the data element in your form.
- You click Insert field or group
- You change the data source to your SP data connection
- You drill down to the corresponding node (i.e. ClockIn) that matches the current data element
- You single-click that field and then click Filter
- In the Filter, you set the BusRoute node of the secondary data connection as being equal to the BusRoute field on your form that is bound to the dropdown
Do this for each, and when you select a bus route, all the other fields will auto-populate with the proper info.