Calculate age using datetime

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Hi,

I was trying to figure out how could I do something if age is between, for example 16-21.

What I have tried:

I have a class called Person.

C#

    public string Name { get; set; }
    public string Surname { get; set; }
    public DateTime Age { get; set; }
}

I was trying to figure out to determine the age between certain values. So let's say that:
Person:
Name: Blah
Surname: Nah
Age: 20

I was trying to create an if statement saying
if age is between 16 and 21 do something etc.

How could I do that?

Thanks in advance.

Posted 26-Nov-17 1:53am

fellanmorgh

Updated 26-Nov-17 2:59am

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2 solutions

Solution 2

Have a look here: Working with Age: it's not the same as a TimeSpan![^]

Posted 26-Nov-17 2:59am

OriginalGriff

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phil.o 27-Nov-17 6:03am

I had forgotten your article, and the odds of computing an age value. Have my 5.

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phil.o · Accepted Answer · 2017-11-26T02:04:00

Actually, you should not have an Age DateTime property. It should be named DateOfBirth (for example). The Age property can then be computed when you need it, from the date of birth.
This way:

C#

public DateTime DateOfBirth { get; set; }

public int Age
{
   get { return (DateTime.Today - DateOfBirth).Days / 365; }
}

Analyze:
- (DateTime.Today - DateOfBirth) returns a TimeSpan value.
- The total number of days in the TimeSpan is divided by the average number of days in a year to give an approximation of the age.

Note that the Age property is read-only, as it is computed everytime the property getter is called. It thus always returns the current age.

Hope this helps. Kindly.