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Sandi Markon
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Sandi Markon
asked on 16 Jul 2012, 12:59 PM
Hello everyone,
When does the CreateNew() method return null? This strange behavior happens regardless, whether the AppointmentsSource property is bound to a non-null collection in my ViewModel or the property is explicitly instantiated somewhere along the way (both scenarios create an instance of ObservableCollection<Appointment>).
Maybe you could give me some insight, before i start digging into my code? :)
Thanks in advance.
When does the CreateNew() method return null? This strange behavior happens regardless, whether the AppointmentsSource property is bound to a non-null collection in my ViewModel or the property is explicitly instantiated somewhere along the way (both scenarios create an instance of ObservableCollection<Appointment>).
Maybe you could give me some insight, before i start digging into my code? :)
Thanks in advance.
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Sandi Markon
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answered on 17 Jul 2012, 11:18 AM
UPDATE: I found the culprit. Somewhere in my code, I have an 'AppointmentCreating'
event handler, whose task is to cancel the creating of an appointment,
if it meets certain criteria. Unfortunately, the appointments I was
creating (or was trying to create), were matching the criteria. Clumsy me :)
Thank you anyway.
Thank you anyway.