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ByGroxD
Asked: 2020-04-04 12:30:57 +0800 CST 2020-04-04 12:30:57 +0800 CST

Calculate age with date of birth MVC5

  • 772

I need to calculate the age of a person from their date of birth, but the calculation is doing me wrong, I give you an example.

Pepito was born on December 17, 1997, at this time Pepito is 19 years old, but the calculation shows me as if he were 20 years old.

My code is the following:

//FECHA NACIMIENTO EN LA BASE DE DATOS
[Display(Name = "Fecha Nacimiento")]
        [DataType(DataType.Date)]
        public DateTime fecha_nacimiento { get; set; }
//CALCULO DE LA EDAD
 [NotMapped]
 [Display(Name = "Edad")]
 public int edad { get { return DateTime.Now.Year - fecha_nacimiento.Year; } }

In my database the date is like this:

1997-12-17 00:00:00,000

asp.net-mvc-5

2 Answers

  1. Best Answer

    It is required to carry out a validation to know the current age, first the difference in years is obtained, then it is compared against the current date and if it is less it means that it has not turned years, then a year is subtracted to obtain the age as of the date of birth. today:

    DateTime fechaNacimiento = new DateTime(1997, 12, 15);

DateTime now = DateTime.Today;
int edad = DateTime.Today.Year - fechaNacimiento.Year;

if (DateTime.Today < fechaNacimiento.AddYears(edad))
    --edad;

    Here you can see theDemostración

    In your case, your code would look like this:

    public int edad
{
    get
    {
        DateTime now = DateTime.Today;
        int edad = DateTime.Today.Year - fecha_nacimiento.Year;

        if (DateTime.Today < fecha_nacimiento.AddYears(edad))
            return --edad;
        else
            return edad;
    }
}
    • 5

  2. I leave you a small fix on the code of the previous partner. I hope it helps you.

    All the best.

     [Display(Name = "Edad")]
    public int Edad
    {
        get
        {
            int edad = DateTime.Today.Year - FechaDeNacimiento.Year;

            //si el mes es menor restamos un año directamente
            if (DateTime.Today.Month < FechaDeNacimiento.Month)
            {
                --edad;                
            }
            //sino preguntamos si estamos en el mismo mes, si es el mismo preguntamos si el dia de hoy es menor al de la fecha de nacimiento
            else if (DateTime.Today.Month == FechaDeNacimiento.Month && DateTime.Today.Day < FechaDeNacimiento.Day)
            {
                --edad;
            }

            return edad;
        }
    }
    • 0