C# 根据身份证号码获取简易信息

public class PackIden
    {
        /// <summary>
        /// 根据身份证获取生日
        /// </summary>
        /// <param name="cardid">身份证</param>
        /// <param name="res">是否有格式(true1990-01-01,false19900101)</param>
        /// <returns></returns>
        public static string GetBirthdayByIdentityCardId(string cardid, bool res)
        {
            string birthday = string.Empty;
            System.Text.RegularExpressions.Regex regex = null;

            if (cardid.Length == )
            {
                regex = new Regex(@"^\d{17}(\d|x)$");
                if (regex.IsMatch(cardid))
                {
                    if (res)
                        birthday = cardid.Substring(, ).Insert(, "-").Insert(, "-");
                    else
                        birthday = cardid.Substring(, );
                }
                else
                {
                    birthday = "invalid cardid";
                }
            }
            else if (cardid.Length == )
            {
                regex = new Regex(@"^\d{15}");
                if (regex.IsMatch(cardid))
                {
                    if (res)
                        birthday = cardid.Substring(, ).Insert(, "-").Insert(, "-");
                    else
                        birthday = cardid.Substring(, );
                }
                else
                {
                    birthday = "invalid cardid";
                }
            }
            else
            {
                birthday = "invalid cardid";
            }

            return birthday;
        }

        /// <summary>
        /// 根据身份证获取身份证信息
        /// 18位身份证
        /// 0地区代码(1~6位,其中1、2位数为各省级政府的代码，3、4位数为地、市级政府的代码，5、6位数为县、区级政府代码)
        /// 1出生年月日(7~14位)
        /// 2顺序号(15~17位单数为男性分配码，双数为女性分配码)
        /// 3性别
        ///
        /// 15位身份证
        /// 0地区代码
        /// 1出生年份(7~8位年,9~10位为出生月份，11~12位为出生日期
        /// 2顺序号(13~15位)，并能够判断性别，奇数为男，偶数为女
        /// 3性别
        /// </summary>
        /// <param name="cardId"></param>
        /// <returns></returns>
        public static string[] GetCardIdInfo(string cardId)
        {
            string[] info = new string[];
            System.Text.RegularExpressions.Regex regex = null;
            if (cardId.Length == )
            {
                regex = new Regex(@"^\d{17}(\d|x)$");
                if (regex.IsMatch(cardId))
                {
                    info.SetValue(cardId.Substring(, ), );
                    info.SetValue(cardId.Substring(, ), );
                    info.SetValue(cardId.Substring(, ), );
                    info.SetValue(Convert.ToInt32(info[]) %  !=  ? "男" : "女", );
                }
            }
            else if (cardId.Length == )
            {
                regex = new Regex(@"^\d{15}");
                if (regex.IsMatch(cardId))
                {
                    info.SetValue(cardId.Substring(, ), );
                    info.SetValue(cardId.Substring(, ), );
                    info.SetValue(cardId.Substring(, ), );
                    info.SetValue(Convert.ToInt32(info[]) %  !=  ? "男" : "女", );
                }
            }

            return info;

        }

    }