Thank you for your question.
Yes, this is possible. In order to achieve this, you should subscribe to the scheduler's AppointmentEditDialogShowing
cancel the original dialog's opening and show your message box. The following code snippet demonstrates this:
sender, AppointmentEditDialogShowingEventArgs e)
List<SchedulerCellElement> cells = SchedulerUIHelper.GetSelectedCells(
(cells.Count == 0)
DialogResult result = MessageBox.Show(
"Are you sure want to add an appointment?"
(result == System.Windows.Forms.DialogResult.Yes)
Appointment appointment =
Appointment(cells.Date, cells[cells.Count - 1].Date.AddHours(1),
I hope this helps. If you have any additional questions, do not hesitate to contact me.
the Telerik team
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