正则表达式分组捕获身份证生日和性别 和判断是否是身份证

 

身份证类：有性别和生日

    public class IdNoMessage
    {
      public  DateTime BirthDay { get; set; }
      public  string Sex { get; set; }
      
      public  bool IsIdNo { get; set; }
    }

　　先判断是否是身份证号，有18位和15位身份证  然后提取性别和生日

　　　public IdNoMessage GetIdNoData(string idNo)
        {
            var idNoData = new IdNoMessage();
            if (string.IsNullOrEmpty(idNo))
            {
                return idNoData;
            }
            string regexStr = @"^\d{6}(?<year>[1-2]\d{3})(?<month>(0[1-9]|11|12))(?<day>(0[1-9]|[1-2][0-9]|30|31))\d{2}(?<sex>\d)[\dXx]$|^\d{6}(?<year>\d{2})(?<month>(0[1-9]|11|12))(?<day>(0[1-9]|[1-2][0-9]|30|31))\d{2}(?<sex>\d)$";
            Match mat = Regex.Match(idNo, regexStr);
            if (!mat.Success)
            {
                return idNoData;
            }
            idNoData.BirthDay = Convert.ToDateTime(mat.Groups["year"].ToString() + "-" + mat.Groups["month"].ToString() + "-" + mat.Groups["day"].ToString());
            idNoData.Sex = Convert.ToInt32(mat.Groups["sex"].ToString()) % 2 == 0 ? "F" : "M";
            idNoData.IsIdNo = true;
            return idNoData;
        }