Comment posted by Scott Lee
16 years ago.
It seems to happen when I set CellsPerHour just before calling Update().
Comment posted by Dan Letecky
16 years ago.
Changing CellsPerHour is not supported during CallBack.
DayPilotCalendar updates only the cell colors (it doesn't redraw the whole background table) after Refresh. If you change CellsPerHour it passes an array with different dimensions to the client.
If you need to change CellsPerHour, the best way is to do it using partial PostBack (inside UpdatePanel).