Depending on the type of appointment, I would like to set enable=false for the basiccontrolspanel and the advancedcontrolspane and leave the ButtonsPanel enabled on the AdvancedEdit form. I am able to use .FindControl to get to ButtonsPanel, but the other panels I am cannot. I get "System.NullReferenceException: 'Object reference not set to an instance of an object.' I need the user to be able to view the AdvancedEdit, so I cannot set AllowEdits=False. Doing this will not allow the user to open the form. Any suggestions aside from finding each control (Subject, StartDate, EndDate, AllDayEvent, etc.) and setting them each to Enabled=false. I am using UI for ASP.NET AJAX, Version 2018.3.910.45.
Thank you for your help.