Suspected Bug: IAppointment.Copy IAppointment.AppointmentCopyFrom

[David]

I have a class that extends Appointment like so:

public class AppointmentTaskVm : Appointment
{
  private int _appointmentTaskId;
  private bool _isBasketItem;
  private int _position;
  private int? _taskId;
  public int AppointmentTaskId
  {
    get { return _appointmentTaskId; }
    set
    {
      _appointmentTaskId = value;
      OnPropertyChanged("AppointmentTaskId");
    }
  }
  public bool IsBasketItem
  {
    get { return _isBasketItem; }
    set
    {
      _isBasketItem = value;
      OnPropertyChanged("IsBasketItem");
    }
  }
  public int Position
  {
    get { return _position; }
    set
    {
      _position = value;
      OnPropertyChanged("Position");
    }
  }
  public int? TaskId
  {
    get { return _taskId; }
    set
    {
      _taskId = value;
      OnPropertyChanged("TaskId");
    }
  }
  public override IAppointment Copy()
  {
    var newAppointment = new AppointmentTaskVm();
    newAppointment.CopyFrom(this);
    return newAppointment;
  }
  public override void CopyFrom(IAppointment other)
  {
    var task = other as AppointmentTaskVm;
    if (task != null)
    {
      AppointmentTaskId = task.AppointmentTaskId;
      IsBasketItem = task.IsBasketItem;
      Position = task.Position;
      TaskId = task.TaskId;
    }
    base.CopyFrom(other);
  }
}

Dragging the AppointmentTaskVm from a ListBox to the ScheduleView causes the Copy and CopyFrom to fire multiple times. This results in the additional properties in the AppointmentTaskVm to loose thier values.

Subscribing to the AppointmentCreated event of the ScheduleView shows that the new AppointmentTaskVm additional properties are initialised with default values (instead of copying the values from the original AppointmentTaskVm).

[Valeri Hristov]

Hi David,

I apologize for the delayed reply. I suppose that RadScheduleView is initially empty and when you drag an appointment from the list box the AppointmentCreated event is fired. This is a result from our workaround for a bug in the WPF ListCollectionView. In the past week we changed this functionality, so most probably we affected your application and I would strongly recommend trying with the assemblies from the upcoming service pack release early next week. If the problem persists, please, send us a simple application that could be used to observe and debug the problem.

Regards,
Valeri Hristov
the Telerik team

[David]

Okay I'll wait for the service pack next week and see if this fixes the issue.