corelibraries-devexpress-dot-xtrascheduler-dot-appointmentoperationeventargs.md
Gets or sets a value indicating whether an end-user is allowed to perform a particular action.
Namespace : DevExpress.XtraScheduler
Assembly : DevExpress.XtraScheduler.v25.2.Core.Desktop.dll
NuGet Package : DevExpress.Scheduler.CoreDesktop
public bool Allow { get; set; }
Public Property Allow As Boolean
| Type | Description |
|---|---|
| Boolean |
true if an action is allowed; otherwise, false.
|
If the Allow property value will not be set in the corresponding AllowAppointment event handler, then it is considered that the action is allowed ( Allow will be set to true by default).
This example demonstrates how to implement custom rules for editing and deleting appointments. The code below allows an appointment to be edited only by its owner (the end-user who created it). To do this it’s necessary to set the SchedulerOptionsCustomization.AllowAppointmentEdit and SchedulerOptionsCustomization.AllowAppointmentDelete properties to UsedAppointmentType.Custom, and handle the SchedulerControl.AllowAppointmentEdit and SchedulerControl.AllowAppointmentDelete events to implement custom logic for editing appointments.
using DevExpress.XtraScheduler;
// ...
private void schedulerControl1_AllowAppointmentDelete(object sender,
AppointmentOperationEventArgs e) {
// Allow only the user who created this appontment to delete it.
e.Allow = CanUserModifyThisAppointment(e.Appointment);
}
private void schedulerControl1_AllowAppointmentEdit(object sender,
AppointmentOperationEventArgs e) {
// Allow only the user who created this appontment to modify it.
e.Allow = CanUserModifyThisAppointment(e.Appointment);
}
// Determine if the current user is the same
// as the one who created the specified appointment
bool CanUserModifyThisAppointment(Appointment apt) {
object obj = apt.CustomFields["Owner"];
if (obj == null)
return true;
string appointmentOwner = obj.ToString();
if (appointmentOwner == String.Empty)
return true;
return (String.Compare(appointmentOwner, tbUserName.Text, true) == 0);
}
Imports DevExpress.XtraScheduler
' ...
Private Sub schedulerControl1_AllowAppointmentDelete(ByVal sender As Object, _
ByVal e As AppointmentOperationEventArgs)
' Allow only the user who created this appontment to delete it.
e.Allow = CanUserModifyThisAppointment(e.Appointment)
End Sub
Private Sub schedulerControl1_AllowAppointmentEdit(ByVal sender As Object, _
ByVal e As AppointmentOperationEventArgs)
' Allow only the user who created this appontment to modify it.
e.Allow = CanUserModifyThisAppointment(e.Appointment)
End Sub
' Determine if the current user is the same
' as the one who created the specified appointment
Private Function CanUserModifyThisAppointment(ByVal apt As Appointment) As Boolean
Dim obj As Object = apt.CustomFields("Owner")
If obj Is Nothing Then
Return True
End If
Dim appointmentOwner As String = obj.ToString()
If appointmentOwner = String.Empty Then
Return True
End If
Return (String.Compare(appointmentOwner, tbUserName.Text, True) = 0)
End Function
See Also
AppointmentOperationEventArgs Class