给定代表某人生日的DateTime,我如何计算他们的年龄(以年为单位)?
当前回答
public string GetAge(this DateTime birthdate, string ageStrinFormat = null)
{
var date = DateTime.Now.AddMonths(-birthdate.Month).AddDays(-birthdate.Day);
return string.Format(ageStrinFormat ?? "{0}/{1}/{2}",
(date.Year - birthdate.Year), date.Month, date.Day);
}
其他回答
我强烈建议使用名为AgeCalculator的NuGet软件包,因为在计算年龄(闰年、时间成分等)时需要考虑很多事情,而且只有两行代码不能削减它。该库给您的时间不只是一年。它甚至在计算时考虑了时间成分,这样你就可以得到一个包含年、月、日和时间成分的准确年龄。更为先进的是,可以选择将2月29日作为闰年,而将2月28日作为非闰年。
哇,我不得不在这里回答。。。这么简单的问题有很多答案。
private int CalcularIdade(DateTime dtNascimento)
{
var nHoje = Convert.ToInt32(DateTime.Today.ToString("yyyyMMdd"));
var nAniversario = Convert.ToInt32(dtNascimento.ToString("yyyyMMdd"));
double diff = (nHoje - nAniversario) / 10000;
var ret = Convert.ToInt32(Math.Truncate(diff));
return ret;
}
我经常用手指数。我需要看一下日历,以确定事情何时发生变化。这就是我在代码中要做的:
int AgeNow(DateTime birthday)
{
return AgeAt(DateTime.Now, birthday);
}
int AgeAt(DateTime now, DateTime birthday)
{
return AgeAt(now, birthday, CultureInfo.CurrentCulture.Calendar);
}
int AgeAt(DateTime now, DateTime birthday, Calendar calendar)
{
// My age has increased on the morning of my
// birthday even though I was born in the evening.
now = now.Date;
birthday = birthday.Date;
var age = 0;
if (now <= birthday) return age; // I am zero now if I am to be born tomorrow.
while (calendar.AddYears(birthday, age + 1) <= now)
{
age++;
}
return age;
}
在LINQPad中运行此过程可获得以下结果:
PASSED: someone born on 28 February 1964 is age 4 on 28 February 1968
PASSED: someone born on 29 February 1964 is age 3 on 28 February 1968
PASSED: someone born on 31 December 2016 is age 0 on 01 January 2017
LINQPad中的代码在这里。
要使用最近的年龄计算年龄:
var ts = DateTime.Now - new DateTime(1988, 3, 19);
var age = Math.Round(ts.Days / 365.0);
var EndDate = new DateTime(2022, 4, 21);
var StartDate = new DateTime(1986, 4, 25);
Int32 Months = EndDate.Month - StartDate.Month;
Int32 Years = EndDate.Year - StartDate.Year;
Int32 Days = EndDate.Day - StartDate.Day;
if (Days < 0)
{
Months = Months - 1;
}
if (Months < 0)
{
Years = Years - 1;
Months = Months + 12;
}
string Ages = Years.ToString() + " Year(s) " + Months.ToString() + " Month(s) ";
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