How to calculate age from date

Question

I see that this has been asked many times. A lot of people have answered, but i haven't been able to make it work.

This is the code I got from my searches:

public static int CalculateAge(DateTime birthDate)
{
    DateTime now = DateTime.Today;
    int years = now.Year - birthDate.Year;

    if (now.Month < birthDate.Month || (now.Month == birthDate.Month && now.Day < birthDate.Day))
        --years;

    return years;
}

How do I supply the birth date from a TextBox?

Im using Jquery calender to supply date into a TextBox3 in dd-mm-yy format..

Now I want to calculate age from the supplied date and then on a button click to save in the DB..

I get the save on DB part, but how do I insert TextBox value into the code above and then use years to save it on my button click event?

Think of this logically. how do you calculate the year difference? Take the current year and subtract that from the supplied year in the DOB. Simple. — Ahmed ilyas, Jan 02 '15 at 15:47
possible duplicate of [How do I calculate someone's age in C#?](http://stackoverflow.com/questions/9/how-do-i-calculate-someones-age-in-c) — Uriil, Jan 02 '15 at 15:49
Logic isnt the problem, i dunno how to pass the BirthDate from a TextBox into the code above.. — Rifshan, Jan 02 '15 at 15:50

score 5 · Accepted Answer · edited May 23 '17 at 12:12

5

So here, how do i supply the birth date from a TextBox?

With supply, if you mean to get it's Text as DateTime, you can parse it to DateTime like;

DateTime dt;
if(DateTime.TryParseExact(TextBox3.Text, "dd-MM-yy",
                          CultureInfo.InvariantCulture,
                          DateTimeStyles.None, out dt))
{
   // now you can use dt with subtract process as a DateTime
}

or if dd-MM-yy format is a standard date and time format for your CurrentCulture, you can directly use DateTime.Parse() method like;

var dt = DateTime.Parse(TextBox3.Text);

By the way, mm specifier is for minutes, MM is for months. Don't forget to add System.Globalization namespace to use them.

How to calculate age from date

1 Answers1