计算两个日期之间的差异并获得以年为单位的值？

发布于 2024-09-07 21:34:50 字数 359 浏览 7 评论 0原文

可能的重复：
如何在 C# 中计算某人的年龄？

我想基本上计算员工的年龄 - 所以我们有每个员工的出生日期，依此类推在 C# 方面，我想做这样的事情 -

int age=Convert.Int32(DateTime.Now-DOB);

我可以使用天数并进行操作，然后获取年龄...但我想知道是否有一些东西可以直接使用来获取年数。

原文

Possible Duplicate:
How do I calculate someone’s age in C#?

I want to calculate basically the age of employees - So we have DOB for each employee, So on
the C# Side I want to do something like this -

int age=Convert.Int32(DateTime.Now-DOB);

I can use days and manipulate then get the age...but I wanted to know if there something I can use directly to get the number of years.

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挽手叙旧 2024-09-14 21:34:50

您想计算员工的年龄吗？然后您可以使用此代码段（来自 Calculate Age in C# ):

DateTime now = DateTime.Today;
int age = now.Year - bday.Year;
if (bday > now.AddYears(-age)) age--;

如果没有，请具体说明。我很难理解你想要什么。

Do you want calculate the age in years for an employee? Then you can use this snippet (from Calculate age in C#):

DateTime now = DateTime.Today;
int age = now.Year - bday.Year;
if (bday > now.AddYears(-age)) age--;

If not, then please specify. I'm having a hard time understanding what you want.

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乖乖公主 2024-09-14 21:34:50

减去两个 DateTime 得到一个 TimeSpan 回来。不幸的是，它返回的最大单位是天。

虽然不准确，但您可以估计它，如下所示：

int days = (DateTime.Today - DOB).Days;

//assume 365.25 days per year
decimal years = days / 365.25m;

编辑：哎呀，TotalDays 是一个双精度数，Days 是一个 int。

Subtracting two DateTime gives you a TimeSpan back. Unfortunately, the largest unit it gives you back is Days.

While not exact, you can estimate it, like this:

int days = (DateTime.Today - DOB).Days;

//assume 365.25 days per year
decimal years = days / 365.25m;

Edit: Whoops, TotalDays is a double, Days is an int.

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看轻我的陪伴 2024-09-14 21:34:50

在此网站上，他们有：

   public static int CalculateAge(DateTime BirthDate)
   {
        int YearsPassed = DateTime.Now.Year - BirthDate.Year;
        // Are we before the birth date this year? If so subtract one year from the mix
        if (DateTime.Now.Month < BirthDate.Month || (DateTime.Now.Month == BirthDate.Month && DateTime.Now.Day < BirthDate.Day))
        {
            YearsPassed--;
        }
        return YearsPassed;
  }

On this site they have:

   public static int CalculateAge(DateTime BirthDate)
   {
        int YearsPassed = DateTime.Now.Year - BirthDate.Year;
        // Are we before the birth date this year? If so subtract one year from the mix
        if (DateTime.Now.Month < BirthDate.Month || (DateTime.Now.Month == BirthDate.Month && DateTime.Now.Day < BirthDate.Day))
        {
            YearsPassed--;
        }
        return YearsPassed;
  }

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雪若未夕 2024-09-14 21:34:50

    private static Int32 CalculateAge(DateTime DOB)
    {
        DateTime temp = DOB;
        Int32 age = 0;
        while ((temp = temp.AddYears(1)) < DateTime.Now)
            age++;
        return age;
    }

    private static Int32 CalculateAge(DateTime DOB)
    {
        DateTime temp = DOB;
        Int32 age = 0;
        while ((temp = temp.AddYears(1)) < DateTime.Now)
            age++;
        return age;
    }

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浊酒尽余欢 2024-09-14 21:34:50

Math.Round(DateTime.Now.Subtract(DOB).TotalDays/365.0)

正如所指出的，这是行不通的。您必须这样做：

(Int32)Math.Round((span.TotalDays - (span.TotalDays % 365.0)) / 365.0);

此时另一个解决方案不太复杂，并且在更大的跨度上仍然准确。

编辑2，怎么样：

Math.Floor(DateTime.Now.Subtract(DOB).TotalDays/365.0)

天哪，我这些天基础数学很糟糕......

Math.Round(DateTime.Now.Subtract(DOB).TotalDays/365.0)

As pointed out, this won't work. You'd have to do this:

(Int32)Math.Round((span.TotalDays - (span.TotalDays % 365.0)) / 365.0);

and at that point the other solution is less complex and continues to be accurate over larger spans.

Edit 2, how about:

Math.Floor(DateTime.Now.Subtract(DOB).TotalDays/365.0)

Christ I suck at basic math these days...

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烦人精 2024-09-14 21:34:50

(DateTime.Now - DOB).TotalDays/365

从另一个 DateTime 结构中减去 DateTime 结构将得到一个具有 TotalDays 属性的 TimeSpan 结构...然后除以 365

(DateTime.Now - DOB).TotalDays/365

Subtracting a DateTime struct from another DateTime struct will give you a TimeSpan struct which has the property TotalDays... then just divide by 365

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