Event column. If DayPilotCalendar.ViewType is set to ViewTypeEnum.Resources it contains column id (DayPilotCalendar.DataColumnField property). Otherwise it contains day identification in YYYY-MM-DD format. Read-only.

public string ColumnId { get; internal set; }

Public Property ColumnId As String

public:
property String^ ColumnId {
	String^ get ();
	void set (String^ value);
}