Hello.

So there are no properties you can set on the TimeLineView, that changes the way it handles all-day appointments when the interval is 1 day?

I tried the code you're suggesting before asking the question here.

The problem with that is that it does not work properly.

An example:

You have an all-day appointment that starts on Jan 20 and ends on Jan 22. If you re-size that one day further, it covers Jan 20,21,22 and 23 in the calendar.

The EndDateTime will be set to Jan 24 00:00.

When you set the AllDayEvent property to true, you will include the entire day of Jan 24 as well.

I tired to fix it by altering the EndDateTime of the appointment when it was the end of the appointment that was resized. I used the following code:

private void ultraTimelineView1_AppointmentResized(object sender, AppointmentResizedEventArgs e)
        {
            if (ultraTimelineView1.PrimaryInterval is DateInterval)//only do this if the interval is at least a day.
            {
                if (e.ResizeType == AppointmentResizeType.AdjustEndDateTime)
                {
                    e.Appointment.EndDateTime = e.Appointment.EndDateTime.Date.AddSeconds(-1);
                }

                e.Appointment.AllDayEvent = true;

            }

}

The problem I have here is that e.ResizeType is AdjustStartDateTime all the time, also when I only resize the end of the appointment.

I have version 10.2.