SchedulerControl.StartAppointmentDragFromOutside Event

Occurs when the user drags an object in the Scheduler from an external source.

Namespace: DevExpress.Xpf.Scheduling

Assembly: DevExpress.Xpf.Scheduling.v21.2.dll

NuGet Package: DevExpress.Wpf.Scheduling

Declaration

C#

public event StartAppointmentDragFromOutsideEventHandler StartAppointmentDragFromOutside

VB.NET

Public Event StartAppointmentDragFromOutside As StartAppointmentDragFromOutsideEventHandler

Event Data

The StartAppointmentDragFromOutside event's data class is DevExpress.Xpf.Scheduling.StartAppointmentDragFromOutsideEventArgs.

Remarks

The CompleteAppointmentDragDrop event does not fire if the drag-drop operation has been initialized outside the Scheduler.

The example below illustrates how to implement drag-drop from a text editor and GridControl.

C#

 private void Scheduler_StartAppointmentDragFromOutside(object sender,
  StartAppointmentDragFromOutsideEventArgs e) {

  // if the user is dragging GridControl data
  if (e.Data.GetDataPresent(typeof(RecordDragDropData))) {
    var rddData = (RecordDragDropData) e.Data.GetData(typeof(RecordDragDropData));
    foreach (var appData in rddData.Records.Cast<AppointmentData>()) {
      var appointment = new AppointmentItem {
        Subject = appData.Subject,
        Location = appData.Location
      };
      appointment.End = appointment.Start + appData.Length;
      e.DragAppointments.Add(appointment);
    }
  }

  // if the user is dragging text
  if (e.Data.GetDataPresent(typeof(string))) {
    var subject = (string) e.Data.GetData(typeof(string));
    var appointment = new AppointmentItem { Subject = subject };
    e.DragAppointments.Add(appointment);
  }
}

VB.NET

 Private Sub Scheduler_StartAppointmentDragFromOutside(ByVal sender As Object, ByVal e As StartAppointmentDragFromOutsideEventArgs)

  ' if the user is dragging GridControl data
  If e.Data.GetDataPresent(GetType(RecordDragDropData)) Then
    Dim rddData = CType(e.Data.GetData(GetType(RecordDragDropData)), RecordDragDropData)
    For Each appData In rddData.Records.Cast(Of AppointmentData)()
      Dim appointment = New AppointmentItem With {
          .Subject = appData.Subject,
          .Location = appData.Location
      }
      appointment.End = appointment.Start + appData.Length
      e.DragAppointments.Add(appointment)
    Next appData
  End If

  ' if the user is dragging text
  If e.Data.GetDataPresent(GetType(String)) Then
    Dim subject = CStr(e.Data.GetData(GetType(String)))
    Dim appointment = New AppointmentItem With {.Subject = subject}
    e.DragAppointments.Add(appointment)
  End If
End Sub

Related GitHub Examples

The following code snippet (auto-collected from DevExpress Examples) contains a reference to the StartAppointmentDragFromOutside event.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

XAML

wpf-scheduler-drop-data-from-grid-control-to-create-appointments/CS/DragDropFromGridExample/MainWindow.xaml#L19

<dxsch:SchedulerControl x:Name="scheduler"
                        StartAppointmentDragFromOutside="scheduler_StartAppointmentDragFromOutside"
                        GroupType="Resource">