Summary of simple methods to calculate age in C#

The vs2010 test passed, the main idea is to calculate the age (year, month, and day) from the date of birth and the current date, two dates.

using System;
using ;
using ;
 
namespace PublicClass
{
  public static class CalculationDate
  {
    /// &lt;summary&gt;
    /// Calculate age (years, month, and day) from two dates    /// &lt;/summary&gt;
    public static void calculationDate(DateTime beginDateTime, DateTime endDateTime)
    {
      if (beginDateTime &gt; endDateTime)
        throw new Exception("The start time should be less than or equal to the end time!");
 
      /* Calculate the total number of months from the date of birth to the current date*/
      int Months =  -  + 12 * ( - );
      /*After the date of birth is added to the total number of months, if it is greater than the current date, it will be reduced by one month*/
      int totalMonth = ((Months) &gt; endDateTime) ? Months - 1 : Months;
      /*Calculate the whole year*/
      int fullYear = totalMonth / 12;
      /*Calculate the whole month*/
      int fullMonth = totalMonth % 12;
      /*Count the number of days*/
      DateTime changeDate = (totalMonth);
      double days = (endDateTime - changeDate).TotalDays;
    }
  }
}

A little simpler:

public int CalculateAgeCorrect(DateTime birthDate, DateTime now)
{
  int age =  - ;
  if ( <  || ( ==  &&  < )) age--;
  return age;
}

Let's take a look at the general method:

Method 1:

    string m_Str = "1984-04-04";
    int m_Y1 = (m_Str).Year;
    int m_Y2 = ;
    int m_Age = m_Y2 - m_Y1;
    (m_Age);

Method 2:

If you format the date as yyyymmdd, subtract the birthday from the current day and remove 4 numbers in the end, you will get the age :)
I believe that such a method can be implemented in any language:

20080814-19800703=280111

Remove the last 4 digits = 28.

 

  int now =(("yyyyMMdd"));

  int dob =(("yyyyMMdd"));

  string dif =(now - dob).ToString();

  string age ="0";

  if(>4)
    age = (0, -4);

Method 3:

DateTime now =;

int age = - ;

if(bday > (-age)) age--;

The above is all about this article, and I hope it will be helpful to everyone to learn C#.