Collection of objects of multiple types which implement an interface.

Question

Hi I have a problem Im hoping someone can help me with. Ive a control which extends the asp.net Calendar Control allowing me to display lists of events on the calendar. Currently its datasource is a Datatable. I have several classes which represent different types of events. The base Class is called CalendarEvent and is exntended by MeetingEvent ConferenceEvent InterviewEvent etc. I have an interface ICalendarEvent which has one method getDataTable which return a datatable in the right format for the Extended Calendar control. My Event classes all implement this interface. I want to create a collection of objects which implement ICalendarEvent. This List should be able to contain objects of type CalendarEvent MeetingEvent etc. Is this possible? Thanks Conor

Conor · Answer

wonderful!

Alan · Answer

If you're using .NET 2.0 or later just use a List . This works in much the same way as an ArrayList except that all the elements must be of types which implement ICalendarEvent. Here's a link to the online docs for the generic List class if you're not familiar with it: http://msdn.microsoft.com/en-us/library/6sh2ey19.aspx