Thank you for contacting us again.
The coloring of the calendar cells for recurring appointments is really not an supported functionality of the RadCalendar control.
Despite that, I have managed to prepare a workaround of scenario you described.
What I am doing in the demo project is subscribing to the OnAppointmentClick
event of the RadScheduler and for the recurring appointments I withdraw the start time for each one of them and color the cells in the calendar respectively. For non recurring appointments I use the appointment's start time.
event is fired when double clicking the appointment; for recurrence appointments you need to select an option(from the "Editing a recurring appointment" dialog) in order to fire the event.
Attached are only the .aspx and aspx.cs files from the project. The .xml file the RadScheduler uses for DataBinding is also attached.
Please let us know if you have any further questions.
the Telerik team