Retreiving upcoming calendar events from a Google Calendar
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by brian_ritchie
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Published on Fri, 04 Mar 2011 03:19:00 GMT
Indexed on
2011/03/04
7:25 UTC
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Google has a great cloud-based calendar service that is part of their Gmail product. Besides using it as a personal calendar, you can use it to store events for display on your web site. The calendar is accessible through Google's GData API for which they provide a C# SDK.
Here's some code to retrieve the upcoming entries from the calendar:
1: public class CalendarEvent
2: {
3: public string Title { get; set; }
4: public DateTime StartTime { get; set; }
5: }
6:
7: public class CalendarHelper
8: {
9: public static CalendarEvent[] GetUpcomingCalendarEvents
10: (int numberofEvents)
11: {
12: CalendarService service = new CalendarService("youraccount");
13: EventQuery query = new EventQuery();
14: query.Uri = new Uri(
15: "http://www.google.com/calendar/feeds/userid/public/full");
16: query.FutureEvents = true;
17: query.SingleEvents = true;
18: query.SortOrder = CalendarSortOrder.ascending;
19: query.NumberToRetrieve = numberofEvents;
20: query.ExtraParameters = "orderby=starttime";
21: var events = service.Query(query);
22: return (from e in events.Entries select new CalendarEvent()
23: { StartTime=(e as EventEntry).Times[0].StartTime,
24: Title = e.Title.Text }).ToArray();
25: }
26: }
There are a few special "tricks" to make this work:
- "SingleEvents" flag will flatten out reoccurring events
- "FutureEvents", "SortOrder", and the "orderby" parameters will get the upcoming events.
- "NumberToRetrieve" will limit the amount coming back
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