dxsch:SchedulerControl allow to drop appointment within the same day only

Hello,

Thank you for the description.

To limit dragged appointments to the same day, you need to handle the DragAppointmentOver event, access the DragAppointments property to get the appointments being dragged, then check if they belong to the same date as their corresponding original appointments in the SourceAppointments property:

C#
private void SchedulerControl_DragAppointmentOver(object sender, DevExpress.Xpf.Scheduling.DragAppointmentOverEventArgs e) {
    var source = e.SourceAppointments.ToArray();
    var dragged = e.DragAppointments.ToArray();
    for (int i = 0; i < dragged.Length; i++) {
        if (source[i].Start.Date != dragged[i].Start.Date) {
            e.Effects = DragDropEffects.None;
            break;
        }
    }
}

When a user drags appointments, SchedulerControl creates new copies of those appointments, and these copies are stored in DragAppointments. You can access the original appointments through SourceAppointments. The appointments in DragAppointments directly correspond to those in SourceAppointments, so it is safe to use array iteration in this case.

Please let me know if this helps.

Regards,
Marc