Found a way to do this:
1. Button fires the read function on the resources data source
$('#room-filter-submit').click(function () {
$('#BookingGrid').data().kendoScheduler.resources[0].dataSource.read();
});
2. Added handler to Change event on the read action of the Resources data source
.DataSource(source => source
.Read(read => read.Action("JsonRooms", "Booking")
.Data("getRoomFilter")
.Type(HttpVerbs.Post)
).Events(e => e.Change("refreshScheduler")))
3. Handler will redraw the Current view
function refreshScheduler() {
$('#BookingGrid').data().kendoScheduler.view($('#BookingGrid').data().kendoScheduler._selectedViewName);
}
Now can filter the resources and refresh the widget.
Ken.