如何从c#中的dob计算年龄（以年为单位）
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How to calculate age in years from dob in c#
提问by Dilipan K
private void button1_Click(object sender, EventArgs e)
{
DateTime dob = new DateTime();
textBox1.Text = dob.ToString();
int age;
age = Convert.ToInt32(textbox2.Text);
age = DateTime.Now.Year - dob.Year;
if (DateTime.Now.DayOfYear < dob.DayOfYear)
age = age - 1;
}
How to claculate the age from dob.This is my form1.cs.any ideas please
如何从 dob 中算出年龄。这是我的 form1.cs.any 想法请
采纳答案by Habib
You can calculate it using TimeSpan like:
您可以使用 TimeSpan 计算它，例如：
DateTime dob = .....
DateTime Today = DateTime.Now;
TimeSpan ts = Today - dob;
DateTime Age = DateTime.MinValue + ts;
// note: MinValue is 1/1/1 so we have to subtract...
int Years = Age.Year - 1;
int Months = Age.Month - 1;
int Days = Age.Day - 1;
回答by gideon
[Update]:To account for leap years use 365.242 instead of 365. You should be good till the year 2799 I believe.
[更新]：为了说明闰年，请使用365.242 而不是 365。我相信你应该一直保持到 2799 年。
DateTime has an operator overload, when you use the subtract operator you get a TimeSpaninstance.
DateTime 有一个运算符重载，当您使用减法运算符时，您将获得一个TimeSpan实例。
So you will just do:
所以你只会做：
DateTime dob = ..
TimeSpan tm = DateTime.Now - dob;
int years = ((tm.Days)/365);
Your code should ideally look like this:
理想情况下，您的代码应如下所示：
private void button1_Click(object sender, EventArgs e)
{
DateTime dob = //get this some somewhere..
textBox1.Text = dob.ToString();
TimeSpan tm = (DateTime.Now - dob);
int age = (tm.Days/365) ;
}
The TimeSpan structure represents a time interval, it has properties like Days,Hours,Secondsetc so you could use them if you need.
时间跨度结构代表的时间间隔，它具有像性能Days，Hours，Seconds等因此，如果你需要，你可以使用它们。
回答by VasanthRavichandran
DateTime today = DateTime.Today;
int age = today.Year - bday.Year;
if (bday > today.AddYears(-age))
age--;
