Adding exception dates to CalendarEvent

[mbowles201]

I have created a Calendar via C# and adding CalendarEvents from a database. I also have a list of dates that are exceptions for each CalendarEvent. How do I add them to the CalendarEvent via code? I dont see any examples and CoPilot created gibberish.

[axunonb]

Here is an example from one of the unit tests how to add ExceptionDates to a CalendarEvent. Hope this helps.

ical.net/Ical.Net.Tests/RecurrenceTests.cs

Lines 3266 to 3284 in d5b8484

	public void AddExDateToEventAfterGetOccurrencesShouldRecomputeResult()
	{
	var searchStart = _now.AddDays(-1);
	var searchEnd = _now.AddDays(7);
	var e = GetEventWithRecurrenceRules();
	var occurrences = e.GetOccurrences(searchStart, searchEnd).ToList();
	Assert.That(occurrences, Has.Count.EqualTo(5));
	var exDate = _now.AddDays(1);
	e.ExceptionDates.Add(new CalDateTime(exDate, false));
	occurrences = e.GetOccurrences(searchStart, searchEnd).ToList();
	Assert.That(occurrences, Has.Count.EqualTo(4));
	//Specifying just a date should "black out" that date
	var excludeTwoDaysFromNow = _now.AddDays(2).Date;
	e.ExceptionDates.Add(new CalDateTime(excludeTwoDaysFromNow, false));
	occurrences = e.GetOccurrences(searchStart, searchEnd).ToList();
	Assert.That(occurrences, Has.Count.EqualTo(3));
	}

[mbowles201]

Thanks, this is great. Our version of iCal.net, the ExceptionDate.Add only takes a PeriodList

[axunonb]

Yes, PeriodList is no more a public class in the v5 API. If you're about to start with ical.net, use v5 - it's heavily improved over v4.

[mbowles201]

Thanks, the team is already a year into the project and an upgrade would hinder release, but will definitely put it in the tech debt space to visit asap.