ID card format verification (including 15-bit conversion to 18-bit) C #

Transformation

Using System;
Using System.Collections.Generic;
Using System.Text;

Namespace ConsoleApplication1
{
Class Program
{
static void Main (string[] args)
{
for (int i = 1; i < i++)
{
Console.Write ("{0}:", i);
for (int k = 1; k <= i; k++)
{
Console.Write ("{0}" + "", I * k);
}


Console.WriteLine ();
}
String str = "620102197811196218";
Checkcid t = new checkcid ();
String str1 = T.checkcidinfo (str);
Console.Write (STR1);
}

<summary>
19
</summary>
public class Idcard
{
WI =2 (n-1) (mod 11)
Int[] wi = new int[] {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1};
Verify digit
Int[] VI = new int[] {1, 0, ' X ', 9, 8, 7, 6, 5, 4, 3, 2};
Private int[] ai = new int[18];
Public Idcard ()
{
}
Verify
public string Verify (string idcard)
{
String strcard = "";
if (Idcard. Length = = 15)
{
Strcard = Uptoeighteen (Idcard);
}
if (Idcard. Length = = 18)
{
Strcard = Idcard;
}
String verify = Idcard. Substring (17, 18);
if (verify. Equals (Getverify (Idcard))) {
return true;
//}
return strcard;
}
Get verify
public string getverify (string eightcardid)
{
int remaining = 0;
if (Eightcardid. Length = = 18)
{
Eightcardid = Eightcardid. Substring (0, 17);
}
if (Eightcardid. Length = = 17)
{
int sum = 0;
for (int i = 0; i < i++)
{
String k = Eightcardid. Substring (i, 1);
Ai[i] = Int. Parse (k);
}
for (int i = 0; i < i++)
{
sum = sum + wi[i] * Ai[i];
}
remaining = sum% 11;
}
return remaining = = 2? "X": (Vi[remaining]). ToString ();
}
Update to 18
public string Uptoeighteen (string fifteencardid)
{
String eightcardid = Fifteencardid. Substring (0, 6);
Eightcardid = Eightcardid + "19";
Eightcardid = Eightcardid + fifteencardid. Substring (6, 9);
Eightcardid = Eightcardid + getverify (eightcardid);
return eightcardid;
}
}
<summary>
Detection
</summary>
public class Checkcid
{
public string Checkcidinfo (String cid)
{
string[] acity = new String[]{null,null,null,null,null,null,null,null,null,null,null, "Beijing", "Tianjin", "Hebei", "Shanxi", "Inner Mongolia", Null,null,null,null,null, "Liaoning", "Jilin", "Heilongjiang", Null,null,null,null,null,null,null, "Shanghai", "Jiangsu", "Zhejiang", "Ann Micro", "Fujian", "Jiangxi", "Shandong" , Null,null,null, "Henan", "Hubei", "Hunan", "Guangdong", "Guangxi", "Hainan", Null,null,null, "Chongqing", "Sichuan", "Guizhou", "Yunnan", "Tibet", Null,null,null,null,null , NULL, "Shaanxi", "Gansu", "Qinghai", "Ningxia", "Xinjiang", Null,null,null,null,null, "Taiwan", Null,null,null,null,null,null,null,null,null, "Hong Kong" , "Macao", Null,null,null,null,null,null,null,null, "abroad"};
Double isum=0;
String info= "";
System.Text.RegularExpressions.Regex RG = new System.Text.RegularExpressions.Regex (@ "^\d{17} (\D|X) $");
System.Text.RegularExpressions.Match MC = RG. Match (CID);
if (!MC. Success)
{
Return "";
}
CID = CID. ToLower ();
CID = CID. Replace ("X", "a");
if (acity[int. Parse (CID. Substring (0,2))]==null)
{
Return to "illegal area";
}
Try
{
DateTime.Parse (CID. Substring (6,4) + "-" +cid. Substring (10,2) + "-" +cid. Substring (12,2));
}
Catch
{
Return "Illegal birthday";
}
for (int i=17;i>=0;i--)
{
Isum + = (System.Math.Pow (2,i)%11) *int. Parse (Cid[17-i]. ToString (), System.Globalization.NumberStyles.HexNumber);

}
if (isum%11!=1)
Return ("Illegal card number");

Return (Acity[int. Parse (CID. Substring (0,2))]+ "," +cid. Substring (6,4) + "-" +cid. Substring (10,2) + "-" +cid. Substring (12,2) + "," + (int. Parse (CID. Substring (16,1))%2==1? " Male ":" female "));

}
}
}
}