C# DateTime List with Null

Asked Jun 09 '21 at 12:15

Active Jun 09 '21 at 12:54

Viewed 40 times

I have a list of DateTime and null values that I want to sort. It looks something like this.

List<DateTime?> allDateTimes = new List<DateTime?>();
allDateTimes.Add(new DateTime(2015, 12, 31, 5, 10, 20));
allDateTimes.Add(Null);
allDateTimes.Add(new DateTime(2014, 11, 15, 5, 10, 20));
allDateTimes.Add(new DateTime(2014, 11, 18, 5, 10, 20));

How would I do to sort this by earliest date and null at last place. I have tried something like this

allDateTimes.Sort((a, b) => a.CompareTo(b));

and

allDateTimes.Sort((a, b) => a.HasValue.CompareTo(b));

But I cant Sort this way because of the null values.

edited Jun 09 '21 at 12:54

asked Jun 09 '21 at 12:15

Adam Lundberg

What problems you are having? – Chetan Jun 09 '21 at 12:28
"I keep having problems" - what problems? – Enigmativity Jun 09 '21 at 12:35
@Adam Lundberg `allDateTimes.Sort((DateTime? a, DateTime? b) => DateTime.Compare(a ?? DateTime.MaxValue, b ?? DateTime.MaxValue));` may work for [you](https://dotnetfiddle.net/ThSsZi). – Trevor Jun 09 '21 at 13:05

C# DateTime List with Null

0 Answers0