age calculation in asp.net c#

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Hi;
I used following code to calculate age in year ,month and day.but i got age in sql and server side different value .

if current date='30/10/2014'
and date of birth='31/12/2011'

i got value in server side -Age:2 Year(s)9 Month(s)29 Day(s)
and in sql -Age:2 Year(s)9 Month(s)30 Day(s)

if month 31 days then claculation different in both sql and c#

*******************************************************
DateTime dt = DateTime.Now;
DateTime dob = Convert.ToDateTime(txtDobE.Text);

int days = dt.Day - dob.Day;
if (days < 0)
{
dt = dt.AddMonths(-1);
days += DateTime.DaysInMonth(dt.Year, dt.Month);
}

int months = dt.Month - dob.Month;
if (months < 0)
{
dt = dt.AddYears(-1);
months += 12;
}

int years = dt.Year - dob.Year;

txtAge.Text = String.Format("Age: {0} Year(s) {1} Month(s) {2} Day(s) ",
Years, Months, Days);

***********************

and in sql
**********************
CREATE function [dbo].[Age](@dayOfBirth datetime, @today datetime)
RETURNS varchar(100)
AS

Begin
DECLARE @tmpdate datetime
DECLARE @years int, @months int, @days int
declare @Age varchar(max)=''
SELECT @tmpdate = @dayOfBirth
SELECT @years = DATEDIFF(yy, @tmpdate, GETDATE()) - CASE WHEN (MONTH(@dayOfBirth) > MONTH(GETDATE())) OR (MONTH(@dayOfBirth) = MONTH(GETDATE()) AND DAY(@dayOfBirth) > DAY(GETDATE())) THEN 1 ELSE 0 END
SELECT @tmpdate = DATEADD(yy, @years, @tmpdate)
SELECT @months = DATEDIFF(m, @tmpdate, GETDATE()) - CASE WHEN DAY(@dayOfBirth) > DAY(GETDATE()) THEN 1 ELSE 0 END
SELECT @tmpdate = DATEADD(m, @months, @tmpdate)
SELECT @days = DATEDIFF(d, @tmpdate, GETDATE())

--set @thisYearBirthDay = @dayOfBirth--DATEADD(year, DATEDIFF(year, @dayOfBirth, @today), @dayOfBirth)
--set @years = DATEDIFF(year, @dayOfBirth, @today) - (CASE WHEN @thisYearBirthDay > @today THEN 1 ELSE 0 END)
--set @months = MONTH(@today - @thisYearBirthDay) - 1
--set @days = DAY(@today - @thisYearBirthDay) - 1
if(@years>0)
BEGIN
set @Age=@Age+cast(@years as varchar(2)) + ' years '
END
if(@months>0)
BEGIN
set @Age=@Age+cast(@months as varchar(2)) + ' months '
END
if(@days>0)
BEGIN
set @Age=@Age+cast(@days as varchar(2)) + ' days '
END

return @Age

Posted 30-Dec-14 18:26pm

Deepthy.P.M

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*Suvabrata Roy* · Answer 1 · 2014-12-30T18:37:00

Hi,

I think you are doing bit more, its very simple

In server Side :

useDateTime.Subtract[^]

System.DateTime date2 = new System.DateTime(1996, 12, 6, 13, 2, 0);
			System.DateTime date3 = new System.DateTime(1996, 10, 12, 8, 42, 0);

			// diff1 gets 185 days, 14 hours, and 47 minutes.
			System.TimeSpan diff1 = date2.Subtract(date1);

Use TimeSpan[^] and calculate exact age.

in SQL Server :
Use DateDiff[^]

SQL

DECLARE @date datetime, @tmpdate datetime, @years int, @months int, @days int
SELECT @date = '2/29/04'

SELECT @tmpdate = @date

SELECT @years = DATEDIFF(yy, @tmpdate, GETDATE()) - CASE WHEN (MONTH(@date) > MONTH(GETDATE())) OR (MONTH(@date) = MONTH(GETDATE()) AND DAY(@date) > DAY(GETDATE())) THEN 1 ELSE 0 END
SELECT @tmpdate = DATEADD(yy, @years, @tmpdate)
SELECT @months = DATEDIFF(m, @tmpdate, GETDATE()) - CASE WHEN DAY(@date) > DAY(GETDATE()) THEN 1 ELSE 0 END
SELECT @tmpdate = DATEADD(m, @months, @tmpdate)
SELECT @days = DATEDIFF(d, @tmpdate, GETDATE())

SELECT @years, @months, @days

Ref : http://stackoverflow.com/questions/57599/how-to-calculate-age-in-t-sql-with-years-months-and-days[^]

Sisir Patro · Answer 2 · 2014-12-30T20:15:00

Solution 2

Hi,

This is a very good link that will help you calculate the age even if it is a lear or not.
Follow here.

Thanks
Sisir Patro

Posted 30-Dec-14 20:15pm

Sisir Patro