Age in years from DateTime (Date of birth)

Question

How Can I calculate Someone's Age in C#?

I have a datetime variable that represents the date of birth of a user.

How can I get the age in years from this?

Update I want a precise birthday, so 30.45 years or something.

Exact duplicate of http://stackoverflow.com/questions/9/how-do-i-calculate-someones-age-in-c — Ian Nelson, Mar 23 '09 at 14:04
Dupe : http://stackoverflow.com/questions/9/how-do-i-calculate-someones-age-in-c — Bobby Cannon, Mar 23 '09 at 14:03

Mark Pim · Answer 1 · 2009-03-23T14:47:37.853

6

Try the following (assuming the date of birth is stored in dtDOB):

public int getAgeInYears {
  TimeSpan tsAge = DateTime.Now.Subtract(dtDOB);

  return new DateTime(tsAge.Ticks).Year - 1;
}

edited Mar 23 '09 at 14:47

answered Mar 23 '09 at 14:05

Mark Pim

This wrong! DateTime.Subtract() returns a Timespan, not a DateTime. – M4N Mar 23 '09 at 14:11

score 4 · Answer 2 · answered Mar 23 '09 at 14:09

4

Stolen from the answer to Jeff's question:

DateTime now = DateTime.Now;
int age = now.Year - bday.Year;
if (now < bday.AddYears(age)) age--;

answered Mar 23 '09 at 14:09

Nathan DeWitt

score 1 · Answer 3 · answered Mar 23 '09 at 14:05

1

You can try with (in Vb):

    Dim dateOfBirth As Date

    Now.Subtract(dateOfBirth).TotalDays \ 365

\ is an Integer division in Vb, I do not know if it has a correspondant in C#.

answered Mar 23 '09 at 14:05

3 Answers3