AppointmentSaving called twice

[Margret]

Hi,
i'm currently using the AppointmentSaving event of the RadScheduleView for validation.
if the edited or created appointment does not contain the right values a MessageBox should be shown an the appointment should not be saved.

Unfortunatly the MessageBox only shows up for about half a second. The next time i create an appointment the messagebox shows up again, because the AppointmentSaving event is fired again.

As i searched the known bugs, i found that this should already be fixed, but i'm already using the newest dlls and it does not seem to work. Am i doing something wrong?!

thanks in advance!

private void OnKalenderAppointmentSaving( object sender, AppointmentSavingEventArgs e )
{
      var appointment = (SedlakAppointment)e.Appointment;

       if( appointment.SelectedUser == null )
       {
           e.Cancel = true;
           e.Handled = true;
           this.ViewModel.ShowError( "Cannot create an appointment without user");
       }
}

[Yana]

Hi Margret,

Please try to cancel the saving of the appointment like this:

private void OnKalenderAppointmentSaving( object  sender, AppointmentSavingEventArgs e )
{
      var appointment = (SedlakAppointment)e.Appointment;

       if( appointment.SelectedUser == null )
       {
          e.Cancel = true;
          (sender as RadScheduleView).Cancel();
          this.ViewModel.ShowError( "Cannot create an appointment without user");
       }
}

this is needed, because when you just cancel the event, the appointment is still in edit state and the ScheduleView tries to save it later.

Hope this helps. If you have any additional questions, do not hesitate to contact us again.

Best wishes,
Yana
the Telerik team

[Margret]

Thanks for your help. Your solution worked almost perfect. Additionally to your solution I had to specify the mainwindow as owner of the messagebox to prevent it from closing immediatly. Afterwards everything worked as expected.
best regards!