CODEWITHSUNDEEP
c#
user2156088
user2156088

Reputation: 2420

Difference between two dates in C#

In a senario I need to find out the difference between two dates.For example Start date is 01/01/2012 and To Date is 01/10/2013 .I need to get the output as 1.9 years.

int tDays=(ToDate.Subtract(FromDAte).Days+1);
int years = tDays / 365;
int months = (tDays % 365) / 31;

But this calculation is wrong in case of Leap years.

Upvotes: 1

Views: 1358

Answers (4)

Sid
Sid

Reputation: 317

Try this!

        DateTime date_start = new DateTime(2011, 1, 30);
        DateTime date_end = new DateTime(2012, 2, 29);//leap year

        DateTime tmp_dtStart = date_start;
        DateTime tmp_dtEnd = date_end;

        //FIX FOR LEAP YEAR
        //If the day is the last day of the month just adding 1 day. This might solve the leap year problem.            
        if (tmp_dtStart.Day == DateTime.DaysInMonth(tmp_dtStart.Year, tmp_dtStart.Month))
        {
           tmp_dtStart= tmp_dtStart.AddDays(1);
        }
        if (tmp_dtEnd.Day == DateTime.DaysInMonth(tmp_dtEnd.Year, tmp_dtEnd.Month))
        {
           tmp_dtEnd= tmp_dtEnd.AddDays(1);
        }

        DateTime diff = new DateTime((tmp_dtEnd - tmp_dtStart).Ticks);

        int years = diff.Year - 1;
        int month = diff.Month - 1;

        string outStr = string.Format("{0}.{1} years", years, month);

I have edited previous code to handle the leap year.

Logic is, (i have used 2 temp date variable without touching the actual date variable) Checking for the day whether it is equals to last day of the month . If yes then add 1 to day and it moves to next month.

I have tested few of the dates it is working fine.

Upvotes: 0

kravasb
kravasb

Reputation: 706

If all you need is simply a value, you can use Ticks property. For example:

//Calculate Ticks in one year
var now = DateTime.Now;
var ticksInYear = (now.AddYears(1) - now).Ticks;

//Create some dates
DateTime first = DateTime.Today.AddYears(-1);
DateTime second = Datetime.Today;

//Get the difference
long value = (second.Ticks - first.Ticks)/ticksInYear;

Upvotes: -1

Alex
Alex

Reputation: 61

You should create a DateTime Object with your regarding dates. Then you can create the difference between two DateTimes, the result is a TimeSpan object.

Upvotes: 0

Jon Skeet
Jon Skeet

Reputation: 1504172

My Noda Time library is built for exactly this sort of thing:

LocalDate start = new LocalDate(...);
LocalDate end = new LocalDate(...);
Period period = Period.Between(start, end);
Console.WriteLine("{0} years, {1} months, {2} days",
                  period.Years, period.Months, period.Days);

Note that this will also deal with the fact that months aren't always the same length - so for example, February 1st to March 1st 2013 (28 days) == 1 month, whereas March 1st to March 29th (also 28 days) == 0 months, 28 days.

That will get you months, years and days - I'm not sure where you get "1.9" from based on your example, unless you're using "years.months", which I'd strongly recommend against as it looks like you mean "very nearly 2 years".

Upvotes: 8

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