SchedulerControl.DragAppointmentOver Event

Raised repeatedly while the user drags appointments within a Scheduler’s view.

Namespace: DevExpress.Xpf.Scheduling

Assembly: DevExpress.Xpf.Scheduling.v24.2.dll

NuGet Package: DevExpress.Wpf.Scheduling

Declaration

C#

public event DragAppointmentOverEventHandler DragAppointmentOver

VB.NET

Public Event DragAppointmentOver As DragAppointmentOverEventHandler

Event Data

The DragAppointmentOver event's data class is DevExpress.Xpf.Scheduling.DragAppointmentOverEventArgs.

Remarks

The example below illustrates how to assign a specific label to appointments that intersect another appointment.

C#

private void Scheduler_DragAppointmentOver(object sender, DragAppointmentOverEventArgs e) {
    //if a dragged appointment intersects another appointment, paint it red to indicate a conflict
   for (int i = 0; i < e.ConflictedAppointments.Count; i++)
      if (e.ConflictedAppointments[i].Count > 0)
         e.DragAppointments[i].LabelId = 1;
      //roll the label back if no conflicts are detected
   for (int j = 0; j < e.ConflictedAppointments.Count; j++)
      if (e.ConflictedAppointments[j].Count == 0)
         e.DragAppointments[j].LabelId = e.SourceAppointments[j].LabelId;
}

VB.NET

 Private Sub Scheduler_DragAppointmentOver(ByVal sender As Object, ByVal e As DragAppointmentOverEventArgs)
    'if a dragged appointment intersects another appointment, paint it red to indicate a conflict
   For i As Integer = 0 To e.ConflictedAppointments.Count - 1
      If e.ConflictedAppointments(i).Count > 0 Then
         e.DragAppointments(i).LabelId = 1
      End If
   Next i
      'roll the label back if no conflicts are detected
   For j As Integer = 0 To e.ConflictedAppointments.Count - 1
      If e.ConflictedAppointments(j).Count = 0 Then
         e.DragAppointments(j).LabelId = e.SourceAppointments(j).LabelId
      End If
   Next j
End Sub