Calculate Age in years based on provided DateTime - CSharp System

CSharp examples for System:DateTime Year

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Description

Calculate Age in years based on provided DateTime

Demo Code


using System.Collections.Generic;
using System;//from  w  w  w .j  a  v  a2 s  .  co  m

public class Main{
        /// <summary>
        /// Calculate Age in years based on provided DateTime
        /// </summary>
        /// <param name="dateOfBirth">Date of birth</param>
        /// <returns>Age in years</returns>
        public static int Age(this DateTime dateOfBirth)
        {
            var today = TimeProvider.Current.Today;
            var bday = dateOfBirth.Date;
            var age = today.Year - bday.Year;
            if (bday > today.AddYears(-age))
            {
                age--;
            }
            return age;
        }
        /// <summary>
        /// Calculate Age in years based on provided DateTime
        /// </summary>
        /// <param name="dateOfBirth">Date of birth</param>
        /// <returns>Null if provided value is null, otherwise age in years</returns>
        public static int? Age(this DateTime? dateOfBirth)
        {
            if (!dateOfBirth.HasValue)
            {
                return default(int?);
            }
            return dateOfBirth.Value.Age();
        }
}

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