using System;
namespace Sp.Common
{
public class ValidatorHelper
{
/// <summary>
/// Address corresponding to the number on the ID card
/// </ summary>
// enum IDAddress
// {
// Beijing = 11, Tianjin = 12, Hebei = 13, Shanxi = 14, Inner Mongolia = 15, Liaoning = 21, Jilin = 22, Heilongjiang = 23, Shanghai = 31, Jiangsu = 32, Zhejiang = 33,
// Anhui = 34, Fujian = 35, Jiangxi = 36, Shandong = 37, Henan = 41, Hubei = 42, Hunan = 43, Guangdong = 44, Guangxi = 45, Hainan = 46, Chongqing = 50, Sichuan = 51,
// Guizhou = 52, Yunnan = 53, Tibet = 54, Shaanxi = 61, Gansu = 62, Qinghai = 63, Ningxia = 64, Xinjiang = 65, Taiwan = 71, Hong Kong = 81, Macau = 82, abroad = 91
// }
/// <summary>
/// Verify a generation ID card number (15 digits)
/// [15 digits long; match the corresponding province address; birthday can be correctly matched]
/// </ summary>
/// <param name = "input"> String to be verified </ param>
/// <returns> Does it match </ returns>
public static bool IsIDCard15 ( string input)
{
// Verify whether it can be converted to a 15-bit integer
long l = 0 ;
if (! Long .TryParse (input, out l) || l.ToString (). Length! = 15 )
{
return false;
}
// Verify that provinces match
// 1 to 6 digits are area codes, of which 1, 2 digits are codes of provincial governments, 3 and 4 digits are codes of local and municipal governments, and 5 and 6 digits are County and district government codes.
string address = " 11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,44,45,46,50,51, 52,53,54,61,62,63,64,65,71,81,82,91, " ;
if (! Address.Contains (input.Remove ( 2 ) + " , " ))
{
return false;
}
// Verify that the birthday matches
string birthdate = input.Substring ( 6 , 6 ) .Insert ( 4 , " / " ) .Insert ( 2 , " / " );
DateTime dt;
if (!DateTime.TryParse(birthdate, out dt))
{
return false;
}
return true;
}
/// <summary>
/// Verify the second generation ID card number (18 digits, GB11643-1999 standard)
/// [The length is 18 digits; the first 17 digits are numbers, and the last digit (check code) can be Case x; match the corresponding province address; birthday can match correctly; check code can match correctly]
/// </ summary>
/// <param name = "input"> string to be verified </ param>
// / <returns> Does it match </ returns>
public static bool IsIDCard18 ( string input)
{
// Verify that it can be converted to the correct integer
long l = 0 ;
if (! Long .TryParse (input.Remove ( 17 ), out l) || l.ToString (). Length! = 17 ||! Long .TryParse (input.Replace ( ' x ' , ' 0 ' ) .Replace ( ' X ' , ' 0 ' ), out l))
{
return false;
}
// Verify that provinces match
// 1 to 6 digits are area codes, of which 1, 2 digits are codes of provincial governments, 3 and 4 digits are codes of local and municipal governments, and 5 and 6 digits are County and district government codes.
string address = " 11,12,13,14,15,21,22,23,31,32,33,34,35,36,37,41,42,43,44,45,46,50,51, 52,53,54,61,62,63,64,65,71,81,82,91, " ;
if (! Address.Contains (input.Remove ( 2 ) + " , " ))
{
return false;
}
// Verify that the birthday matches
string birthdate = input.Substring ( 6 , 8 ) .Insert ( 6 , " / " ) .Insert ( 4 , " / " );
DateTime dt;
if (!DateTime.TryParse(birthdate, out dt))
{
return false;
}
// Verification code verification
// Verification code:
// (1) Weighted sum formula of 17-digit body code
// S = Sum (Ai * Wi), i = 0, ..., 16, first The sum of the weights of the first 17 digits
// Ai: indicates the digital value of the ID number at position i
// Wi: indicates the weighting factor at position i
// Wi: 7 9 10 5 8 4 2 1 6 3 7 9 10 5 8 4 2
// (2) Calculate the modulus
// Y = mod (S, 11)
// (3) Get the corresponding check code through the modulus
// Y: 0 1 2 3 4 5 6 7 8 9 10
// Check code: 1 0 X 9 8 7 6 5 4 3 2
string [] arrVarifyCode = ( " 1,0, x, 9,8,7,6,5,4,3,2 ").Split(',');
string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
char[] Ai = input.Remove(17).ToCharArray();
int sum = 0;
for (int i = 0; i < 17; i++)
{
sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
}
int y = -1;
Math.DivRem(sum, 11, out y);
if (arrVarifyCode[y] != input.Substring(17, 1).ToLower())
{
return false;
}
return true;
}
/// <summary>
/// Verify the ID number (do not distinguish between the first and second generation ID numbers)
/// </ summary>
/// <param name = "input"> the string to be verified </ param>
/// <returns> Does it match </ returns>
public static bool IsIDCard ( string input)
{
if (input.Length == 18)
return IsIDCard18(input);
else if (input.Length == 15)
return IsIDCard15(input);
else
return false;
}
}
}
