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I want to create a calendar in my application that external users can view.

The CalDAV (basically WebDAV+iCalendar) format seems to be relatively widely supported, although if rather unusually by some clients (Outlook, for instance). Completely new to me though.

I want to externally publish events, I don't need users to be able to update them.

The text format of events in .ics files appears relatively simple:

BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT DTSTART:20091130T000000Z DTEND:20091201T000000Z SUMMARY:Test event for calendar format LOCATION:Company site DESCRIPTION:Test event.\nMore text on a new line END:VEVENT END:VCALENDAR

However I don't really want to write my own ics file builder. The key names starting on each line don't seem to be very consistent between ics files too.

Is there a .Net implementation out there? Ideally I don't want to set up a whole WebDAV implementation - just the ability to retrieve a read-only calendar.

I mainly want this to be at a url that users can sync from iPhone, Android and Blackberry phones. I know that they can handle CalDAV services from some suppliers but not others (for instance my iPhone can sync from Google calendar but fails with FaceBook's events) - anyone have any idea why?

I think events can also contain MIME attachments - is this sufficiently supported to be worth looking into too?

Update

Further research on this has identified some weird inconsistencies in most implementations. None of the major mobile client OSs (iPhone, Blackberry, Android) can handle .ics files.

However iPhones can open an .ics from a URL (choose to subscribe to a calendar) and this does work with FaceBook too. Blackberry and Android can't however. I think the Blackberry can handle the full CalDAV option (rather than just the .ics file) but don't know much about programming for it.

Is there a consistent way to do this out there?

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    I'm curious, did you ended up doing anything with this? Commented May 29, 2011 at 21:37

3 Answers 3

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I've used http://sourceforge.net/projects/dday-ical/ for a project last year. Works perfectly!

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Is it still usable or too outdated?
The last time the library is updated was in 2016. Is there any other option?
I just found something else. I haven't tried it yet, but there is even a documentation for migrating from DDay.iCal as well. github.com/rianjs/ical.net
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The company IT Hit WebDav System offers

  • IT Hit WebDAV Server Engine v3 for .Net (starting at $ 1250)) and
  • a IT Hit WebDAV Client .Net (starting at $350).

It works with iOS Calendar, Android CalDAV-Sync, Mac OS X Calendar, Mozilla Lightning, eM Client, Bynari Outlook plugin, Evolution and others.

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Just a quick warning this is a pay'd for solustion
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If what you are looking for is a CalDAV Client then my suggestion is DAVDroid, this is the best CalDAV Client I have never tried. It's a connector for the calendar account of your phone allowing to consume the data from your CalDAV Server from any Calendar App installed on your phone.

Other interesting CalDAV Clients are:

Windows:

If you are looking for a ICalendar library for .NET you can check the one my friend and I build: ICalendar

Any doudt you can ask us!!!

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