Convert String to Nullable DateTime

Question

Possible Duplicate:
How do I use DateTime.TryParse with a Nullable<DateTime>?

I have this line of code

DateTime? dt = Condition == true ? (DateTime?)Convert.ToDateTime(stringDate) : null;

Is this the correct way to convert string to Nullable DateTime, or is there a direct method to convert without converting it to DateTime and again casting it to Nullable DateTime?

You may cast null to nullable DateTime: `Condition == true ? Convert.ToDateTime(stringDate) : (DateTime?) null;` :) — Artemix, Nov 06 '12 at 08:41

score 81 · Accepted Answer · answered Nov 06 '12 at 08:39

81

You can try this:-

 DateTime? dt = string.IsNullOrEmpty(date) ? (DateTime?)null : DateTime.Parse(date);

answered Nov 06 '12 at 08:39

Rahul Tripathi

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I might suggest `string.IsNullOrEmpty(date)` rather than `date == null`. – moribvndvs Nov 06 '12 at 08:41
3

That wouldn't work if a string that was neither empty nor a valid date was passed. For better solutions see http://stackoverflow.com/questions/192121/how-do-i-use-datetime-tryparse-with-a-nullabledatetime – thelem Aug 07 '14 at 15:49

score 16 · Answer 2 · answered Nov 06 '12 at 08:43

16

You are able to build a method to do this:

public static DateTime? TryParse(string stringDate)
{
    DateTime date;
    return DateTime.TryParse(stringDate, out date) ? date : (DateTime?)null;
}

answered Nov 06 '12 at 08:43

cuongle

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This won't work since date is not a nullable datetime. – bret Mar 27 '14 at 22:18
2

@bret: Did you try this? – cuongle Mar 28 '14 at 03:35

score 3 · Answer 3 · answered Nov 06 '12 at 08:41

3

DateTime? dt = (String.IsNullOrEmpty(stringData) ? (DateTime?)null : DateTime.Parse(dateString));

answered Nov 06 '12 at 08:41

Matthew Layton

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score 1 · Answer 4 · answered Nov 06 '12 at 08:43

1

Simply assigned without cast at all :)

DateTime? dt = Condition == true ? Convert.ToDateTime(stringDate) : null;

answered Nov 06 '12 at 08:43

Han

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Convert String to Nullable DateTime

4 Answers4

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