PersistentObjectCancelEventArgs.Cancel Property

Gets or sets whether to cancel the operation.

Namespace: DevExpress.XtraScheduler

Assembly: DevExpress.XtraScheduler.v19.2.Core.dll

Declaration

C#

public bool Cancel { get; set; }

VB.NET

Public Property Cancel As Boolean

Property Value

Type	Description
Boolean	true to cancel the operation performed on the event; otherwise, false.

Remarks

Set the Cancel parameter to true to cancel the processing of an event. Use this to cancel the loading, inserting or deleting of either appointments or resources.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Cancel property.

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.

C#

how-to-use-custom-appointment-fields-in-a-custom-editing-form-e2782/CS/SimpleCustomFields/Form1.cs#L72

private void SchedulerStorage1_AppointmentInserting(object sender, PersistentObjectCancelEventArgs e) {
    if (((Appointment)e.Object).Start < DateTime.Now) e.Cancel = true;
}

winforms-schedulercontrol-api-t224044/CS/SchedulerAPISample/CodeExamples/AppointmentEvents.cs#L19

if (busyKey != null) {
    e.Cancel = ((Appointment)e.Object).StatusKey.Equals(busyKey);
}

Custom-Responsive-Web-Application/CS/ResponsiveWebApplication/Scheduler.aspx.cs#L35

if(ResourcesListBox.SelectedValues.Count == 0)
    e.Cancel = true;
else {

how-to-implement-appointment-deleting-confirmation-using-the-popup-menu-option-e1372/CS/WindowsApplication1/Form1.cs#L36

    if (res != DialogResult.Yes)
        e.Cancel = true;
}

how-to-paint-a-special-time-area-for-an-appointment-and-interact-with-it-t246714/CS/T246714/Form1.cs#L60

    Appointment apt = (Appointment)e.Object;
    e.Cancel = (apt.Start < (DateTime)apt.CustomFields["SafeIntervalStartCF"] || apt.End > (DateTime)apt.CustomFields["SafeIntervalEndCF"]);
}

VB.NET

how-to-use-custom-appointment-fields-in-a-custom-editing-form-e2782/VB/SimpleCustomFields/Form1.vb#L74

If CType(e.Object, Appointment).Start < Date.Now Then
    e.Cancel = True
End If

winforms-schedulercontrol-api-t224044/VB/SchedulerAPISample/CodeExamples/AppointmentEvents.vb#L17

If busyKey IsNot Nothing Then
    e.Cancel = CType(e.Object, Appointment).StatusKey.Equals(busyKey)
End If

how-to-implement-appointment-deleting-confirmation-using-the-popup-menu-option-e1372/VB/WindowsApplication1/Form1.vb#L38

If res <> System.Windows.Forms.DialogResult.Yes Then
    e.Cancel = True
End If

how-to-paint-a-special-time-area-for-an-appointment-and-interact-with-it-t246714/VB/T246714/Form1.vb#L62

    Dim apt As Appointment = CType(e.Object, Appointment)
    e.Cancel = (apt.Start < DirectCast(apt.CustomFields("SafeIntervalStartCF"), Date) OrElse apt.End > DirectCast(apt.CustomFields("SafeIntervalEndCF"), Date))
End Sub

how-to-resize-an-appointment-without-snapping-it-to-time-cells-e2341/VB/WindowsApplication1/Form1.vb#L65

If obj IsNot Nothing Then
    e.Cancel = Not Convert.ToBoolean(obj)
End If