Retrieving Year and calculating difference

[RP]

I have a date entered in a TextBox. On this TextBox LostFocus, I want
to retrieve the year part and then calculate the difference from
current year.

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You do not need to "retrieve the year part". If both are DateTime object, all
you need to do is date math with them and get the result.
-- Peter
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"RP" wrote:

I have a date entered in a TextBox. On this TextBox LostFocus, I want
to retrieve the year part and then calculate the difference from
current year.

[RP]

Did something like this:

--------------------------------------------------------------------
DateTime myDate = txtDOB.Text;
int myYear = myDate.Year;
int PresentYear = DateTime.Now.Year;
txtAge.Text = (PresentYear - myYear);
----------------------------------------------------------------------

Please correct.

Peter Bromberg [ C# MVP ] wrote:

You do not need to "retrieve the year part". If both are DateTime object, all
you need to do is date math with them and get the result.

[Peter Duniho]

RP wrote:

Did something like this:

--------------------------------------------------------------------
DateTime myDate = txtDOB.Text;
int myYear = myDate.Year;
int PresentYear = DateTime.Now.Year;
txtAge.Text = (PresentYear - myYear);
----------------------------------------------------------------------

Please correct.

What about the code doesn't do what you want?

The one thing that jumps out to me is that if you are really looking for
a calculation of "age", then the above doesn't take into account the
rest of the date. Is that your concern?

If so, then something like this might work for you:

DateTime myDate = DateTime.Parse(txtDOB.Text),
dateNow = DateTime.Now;
int cyearsAge = dateNow.Year - myDate.Year;

myDate = myDate.AddYears(cyearsAge);
if (myDate dateNow)
{
cyearsAge--;
}

txtAge.Text = cyearsAge.ToString();

Pete

[Rad [Visual C# MVP]]

On Tue, 14 Aug 2007 13:28:50 -0700, RP <rp*********@gmail.comwrote:

>Did something like this:

--------------------------------------------------------------------
DateTime myDate = txtDOB.Text;
int myYear = myDate.Year;
int PresentYear = DateTime.Now.Year;
txtAge.Text = (PresentYear - myYear);
----------------------------------------------------------------------

Please correct.

Peter Bromberg [ C# MVP ] wrote:

>You do not need to "retrieve the year part". If both are DateTime object, all
you need to do is date math with them and get the result.

Of course it depends on your definition for a year. How will the code
handle a situation like 1 Jan 2007 and 31 Dec 2007? Personally I'd do
the following:

DateTime myDate = DateTime.Parse(txtDOB.Text);
TimeSpan interval = myDate - DateTime.Now
decimal years = interval.Days / 365

In this case years will have a pretty good representation of elasped
years, which you can then decide to round up depending on the level of
accuracy you want. So 0.999 could be pushed up to 1.

--
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