身份证号码验证 类

/// <summary>
/// 性别
/// </summary>
public enum enumIDCardSex
{
//女性
Woman = 0,
//男性
Man = 1
}

/// <summary>
/// 身份证检查工具
/// </summary>
public class IDCardCheckTool
{
//各省市地区国家代码前两位代码是：
//北京 11   吉林   22     福建 35   广东 44   云南 53   天津 12   黑龙江 23
//江西 36   广西   45     西藏 54   河北 13   上海 31   山东 37   海南   46
//陕西 61   山西   14     江苏 32   河南 41   重庆 50   辽宁 21   安徽   34
//甘肃 62   内蒙古 15     浙江 33   湖北 42   四川 51   青海 63   湖南   43
//贵州 52   宁夏   64     新疆 65   台湾 71   香港 81   澳门 82   国外   91

/// <summary>
/// 省份代码
/// </summary>
//private static IList<string> listProvice = new List<string> {
//    "11","22","35","44","53","12","23","36","45","54","13",
//    "31","37","46","61","14","32","41","50","62","15","33",
//    "42","51","63","21","34","43","52","64","65","71","81","82","91"};

/// <summary>
/// 检查身份证是否有效
/// </summary>
/// <param name="id">身份证号码</param>
/// <param name="msg">返回消息</param>
/// <returns></returns>
public static bool CheckIDCardValid(string id, out string msg)
{
msg = string.Empty;
bool ret = true;
if (!CheckLength(id))
{
msg = "身份证号码长度不正确!";
return false;
}

if (!CheckValidWords(id, out msg))
{
return false;
}

switch (id.Length)
{
case 18:
ret = CheckIDCard18(id, out msg);
break;
case 15:
ret = CheckIDCard15(id, out msg);
break;
}
return ret ;
}

/// <summary>
/// 检查身份证是否有效
/// </summary>
/// <param name="id">身份证号码</param>
/// <param name="sex">性别</param>
/// <param name="msg">返回消息</param>
/// <returns></returns>
public static bool CheckIDCardValid(string id, string sex, out string msg)
{
if (sex != "男" && sex != "女")
{
msg = "sex 参数传入错误";
return false;
}
msg = string.Empty;
bool ret = true;
if (!CheckLength(id))
{
msg = "身份证号码长度不正确!";
return false;
}

if (!CheckValidWords(id, out msg))
{
return false;
}

enumIDCardSex enumSex;
if (sex == "男")
enumSex = enumIDCardSex.Man;
else
enumSex = enumIDCardSex.Woman;

switch (id.Length)
{
case 18:
ret = CheckIDCard18(id, enumSex, out msg);
break;
case 15:
ret = CheckIDCard15(id, enumSex, out msg);
break;
}

return ret;
}

/// <summary>
/// 检查身份证长度是否正确
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
private static bool CheckLength(string id)
{
if (id.Length != 15 && id.Length != 18)
return false;
else
return true;
}

/// <summary>
/// 检查15位身份证号码（包括性别）
/// </summary>
/// <param name="id"></param>
/// <param name="sex"></param>
/// <param name="msg"></param>
/// <returns></returns>
private static  bool CheckIDCard15(string id, enumIDCardSex sex , out string msg)
{
msg = string.Empty;
if (!CheckSex(id[id.Length - 1], sex))
{
msg = "性别不匹配";
return false;
}

if(!CheckBirthFormat(id.Substring(6,6)))
{
msg = "出生日期格式不正确";
return false;
}

return true;
}

/// <summary>
/// 检查15位身份证号码
/// </summary>
/// <param name="id"></param>
/// <param name="msg"></param>
/// <returns></returns>
private static bool CheckIDCard15(string id, out string msg)
{
msg = string.Empty;
if(!CheckBirthFormat(id.Substring(6,6)))
{
msg = "出生日期格式不正确";
return false;
}
return true;
}

/// <summary>
/// 检查18位身份证号码（包括性别）
/// </summary>
/// <param name="id"></param>
/// <param name="sex"></param>
/// <param name="msg"></param>
/// <returns></returns>
private static bool CheckIDCard18(string id, enumIDCardSex sex, out string msg)
{
msg = string.Empty;
if (!CheckSex(id[id.Length - 2], sex))
{
msg = "性别不匹配";
return false;
}

if (!CheckBirthFormat(id.Substring(6, 8)))
{
msg = "出生日期格式不正确";
return false;
}

if (!CheckVerificationCode(id))
{
msg = "身份证号码错误";
return false;
}

return true;
}

/// <summary>
/// 检查18位身份证号码
/// </summary>
/// <param name="id"></param>
/// <param name="msg"></param>
/// <returns></returns>
private static bool CheckIDCard18(string id, out string msg)
{
msg = string.Empty;
if (!CheckBirthFormat(id.Substring(6, 8)))
{
msg = "出生日期格式不正确";
return false;
}

if (!CheckVerificationCode(id))
{
msg = "身份证号码错误";
return false;
}
return true;
}

/// <summary>
/// 检查省份代码是否存在
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
private static bool CheckProviceNumExist(string id)
{
IList<string> listProvice = new List<string> {
"11","22","35","44","53","12","23","36","45","54","13",
"31","37","46","61","14","32","41","50","62","15","33",
"42","51","63","21","34","43","52","64","65","71","81","82","91"};
string proId = id.Substring(0, 2);
if(!listProvice.Contains(proId))
return false;
return true;
}

/// <summary>
/// 检查是否存在非法字符
/// </summary>
/// <param name="id">身份证号</param>
/// <param name="msg">输出信息</param>
/// <returns></returns>
private static bool CheckValidWords(string id, out string msg)
{
StringBuilder sb = new StringBuilder();
bool ret = true;
int index = 1;
foreach (var p in id)
{//88 和 120 分别对应的是 X 和 x

if (index == id.Length)
{
if ((p < 48 || p > 57) && (p != 88 || p != 120))
{
sb.AppendFormat("第{1}位存在非法字符{0}\r\n", p.ToString(), index.ToString());
ret = false;
}
}
else
{
if (p < 48 || p > 57)
{
sb.AppendFormat("第{1}位存在非法字符{0}\r\n", p.ToString(), index.ToString());
ret = false;
}
}
index++;
}
msg = sb.ToString();
return ret;
}

/// <summary>
/// 检查身份证对应性别
/// 对应位 奇数为男性，偶数为女性
/// </summary>
/// <param name="c"></param>
/// <param name="sex"></param>
/// <returns></returns>
private static bool CheckSex(char c, enumIDCardSex sex)
{
int temp = Convert.ToInt32(c) % 2;
if ((enumIDCardSex)temp != sex)
{
return false;
}
return true;
}

/// <summary>
/// 检查出身日期格式
/// </summary>
/// <param name="birthDay">身份证中原始生日字符串</param>
/// <returns></returns>
private static bool CheckBirthFormat(string birthDay)
{
if (birthDay.Length == 8)
{
birthDay = birthDay.Insert(6, "-").Insert(4, "-");
}
else if (birthDay.Length == 6)
{
birthDay = birthDay.Insert(4, "-").Insert(2, "-");
}

DateTime dt;
if (DateTime.TryParse(birthDay, out dt))
return true;
else
return false;

}

/// <summary>
/// 检查校验值
/// </summary>
/// <param name="id">身份证号</param>
/// <returns></returns>
private static bool CheckVerificationCode(string id)
{
string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
//每位数字对应的加权因子
IList<int> Wi = new List<int>{ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };
char[] Ai = id.Remove(17).ToCharArray();
int sum = 0;
for (int i = 0; i <= Wi.Count - 1; i++)
{
sum += Convert.ToInt32(Ai[i].ToString()) * Wi[i];
}
int y = -1;
Math.DivRem(sum, 11, out y);
if (arrVarifyCode[y] != id[17].ToString().ToLower())
{
return false;
}
return true;
}
}