C#根据身份证号码,计算生日、年龄、性别

时间:2024-03-06 13:35:25

朋友谈及身份证相关的信息,才了解到原来省份证号码中包含了年龄和性别。

这样在数据库中,就不必单独留字段存放它们了(不过,要根据具体情况来,要是读取频率较高,还是单独列出为好),这样顺带解决了年龄变更的问题。

程序仅仅为了实现这个功能,里面还是需要数据验证的,用户输入的信息,毕竟在猿类看来,都是“非法的”。废话不多说了,贴上我写的程序,还请路过的大神斧正:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace calculateAgeBirthdatSexDemo
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string identityCard = "32128119930718125X";//随便拼的,如有雷同,纯属搞怪哈
            BirthdayAgeSex entity = new BirthdayAgeSex();
            entity=GetBirthdayAgeSex(identityCard);
            if (entity != null)
            {
                Console.WriteLine(entity.Birthday + "-----" + entity.Sex + "-----" + entity.Age);
            }
            Console.ReadLine();
        }

        public static BirthdayAgeSex GetBirthdayAgeSex(string identityCard)
        {
            if (string.IsNullOrEmpty(identityCard))
            {
                return null;
            }
            else
            {
                if (identityCard.Length != 15 && identityCard.Length != 18)//身份证号码只能为15位或18位其它不合法
                {
                    return null;
                }
            }

            BirthdayAgeSex entity = new BirthdayAgeSex();
            string strSex = string.Empty;
            if (identityCard.Length == 18)//处理18位的身份证号码从号码中得到生日和性别代码
            {
                entity.Birthday = identityCard.Substring(6, 4) + "-" + identityCard.Substring(10, 2) + "-" + identityCard.Substring(12, 2);
                strSex = identityCard.Substring(14, 3);
            }
            if (identityCard.Length == 15)
            {
                entity.Birthday = "19" + identityCard.Substring(6, 2) + "-" + identityCard.Substring(8, 2) + "-" + identityCard.Substring(10, 2);
                strSex = identityCard.Substring(12, 3);
            }
            
            entity.Age = CalculateAge(entity.Birthday);//根据生日计算年龄
            if (int.Parse(strSex) % 2 == 0)//性别代码为偶数是女性奇数为男性
            {
                entity.Sex = "";
            }
            else
            {
                entity.Sex = "";
            }
            return entity;
        }

        /// <summary>
        /// 根据出生日期,计算精确的年龄
        /// </summary>
        /// <param name="birthDate">生日</param>
        /// <returns></returns>
        public static int CalculateAge(string birthDay)
        {
            DateTime birthDate=DateTime.Parse(birthDay);
            DateTime nowDateTime=DateTime.Now;
            int age = nowDateTime.Year - birthDate.Year;
            //再考虑月、天的因素
            if (nowDateTime.Month < birthDate.Month || (nowDateTime.Month == birthDate.Month && nowDateTime.Day < birthDate.Day))
            { 
                age--; 
            }
            return age;
        }

        /// <summary>
        /// 定义 生日年龄性别 实体
        /// </summary>
        public class BirthdayAgeSex
        {
            public string Birthday { get; set; }
            public int Age { get; set; }
            public string Sex { get; set; }
        }
    }
}

(ps:多年前写的了,今天看了下,确实很水啊。。。。)