If AutoRefresh is enabled, the Gantt chart control will fire command event periodically. The value of this property will be used as "command" text (accessible in Command event handler on the server side).
DayPilot.Gantt.autoRefreshCommand (string)
"refresh"
This property is only applicable to versions with integrated server-side backend (DayPilot Pro for ASP.NET WebForms, DayPilot Pro for ASP.NET MVC).
gantt.autoRefreshCommand = "autorefresh";