C#实现的18位身份证格式验证算法[详细版]

项目分析

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第一部分—生成号码

代码概述

1．事件：void frmAlgorithm_Load(object sender, EventArgs e)

描述:首先,在窗体加载时,调用"void GetDiscInfo(string sFilenName)"读取"DiscInfo.txt"中的信息，然后在"cbProvince"中显示读取的信息(使用了外设组件"bsProvince")。

2．事件: void cbProvince_SelectedIndexChanged(object sender, EventArgs e)

描述:在选择省份时,调用"List<clsAdministrativeDivisionsCode> GetSomeCodes(string sCondition)"在"cbCities"中显示省份的下属市或县(使用了外设组件"bsCity")。

----------------核心代码-↓↓↓------------------------------------

3．事件: void btnGenID_Click(object sender, EventArgs e)

描述: 方法1:"List<string> GetID()" //生成14位数号码,并返回18位数号码

方法2: "List<string> GenRnd(int iSex)" //返回3位数的顺序码

方法3: "string GenParityBit(string s17)" //返回1位数的校验码

根据选择好的生日和性别生成号码.首先调用方法1.在方法1中调用了方法2和方法3,方法2返回3位数的顺序码,方法3返回1位数的校验码.方法1自身生成14位数号码+3位顺序码+1位校验码=18位号码,返回给外设组件"bsID",然后显示.

----------------核心代码-↑↑↑---------------------------------------

源代码

class clsAdministrativeDivisionsCode

{

private string adCode;

private string adName;

public clsAdministrativeDivisionsCode(string code, string name)

{ adCode = code; adName = name; }

public string AdCode

{

get { return adCode; }

set { adCode = value; }

}

public string AdName

{

get { return adName; }

set { adName = value; }

}

}// class clsAdministrativeDivisionsCode

public class frmAlgorithm : Form

{

private int maxNum = 500;

List<clsAdministrativeDivisionsCode> provinceCode = new List<clsAdministrativeDivisionsCode>();

List<clsAdministrativeDivisionsCode> cityCode = new List<clsAdministrativeDivisionsCode>();

List<string> ID = new List<string>();

private void frmAlgorithm_Load(object sender, EventArgs e)

{

GetDiscInfo("DiscInfo.txt");

bsProvince.DataSource = provinceCode;

cbProvince.DataSource = bsProvince;

cbProvince.DisplayMember = "AdName";

cbProvince.ValueMember = "AdCode";

cbProvince.SelectedIndex = -1; //引发cbProvince_SelectedIndexChanged事件

lblMsg.Text = @"请在文本框中输入位有效身份证号，验证通过后方可解读。";

}//void frmAlgorithm_Load

private void GetDiscInfo(string sFilenName)

{

using (StreamReader sr = new StreamReader(Environment.CurrentDirectory + @"\" + sFilenName, Encoding.Default)) {

string sLine = string.Empty;

Regex re = new Regex(@"[\s]{1,}", RegexOptions.Compiled); //指定至少匹配个空白字符,程序集

while (!sr.EndOfStream) { //如果流不在末尾,则循环

sLine = sr.ReadLine();

sLine = re.Replace(sLine, " ");

string[] sTemp = sLine.Split(new char[] { ' ' });

if (sTemp[0].EndsWith("0000")) {

provinceCode.Add(new clsAdministrativeDivisionsCode(sTemp[0],sTemp[1])); }

else {

if (sTemp[0].EndsWith("00"))

cityCode.Add(new clsAdministrativeDivisionsCode(sTemp[0],sTemp[1]));

else

if (sTemp[1].EndsWith("市辖区"))

cityCode.Add(new clsAdministrativeDivisionsCode(sTemp[0], " " + sTemp[1]));

else

cityCode.Add(new clsAdministrativeDivisionsCode(sTemp[0], " " + sTemp[1]));

}//else

}//while

}//using

}//void GetDiscInfo(string sFilenName)

//事件将在省份列表的选择中被引发

private void cbProvince_SelectedIndexChanged(object sender, EventArgs e)

{

List<clsAdministrativeDivisionsCode> tempCity = new List<clsAdministrativeDivisionsCode>();

if (cbProvince.SelectedValue != null)

{

//调用Substring(0, 2)的目的是：提取公共部分来查找下属市或县

//例如：山西省的省号为140000，则其下属市或县的号码都以14开头

//140101　市辖区 140105　小店区

//140106　迎泽区 140122　阳曲县

tempCity = GetSomeCodes(cbProvince.SelectedValue.ToString().Substring(0, 2));

if (tempCity != null)

{

bsCity.DataSource = tempCity;

cbCities.DataSource = bsCity;

cbCities.DisplayMember = "AdName";

cbCities.ValueMember = "AdCode";//显示信息

}//if

}//if

}//cbProvince_SelectedIndexChanged

private List<clsAdministrativeDivisionsCode> GetSomeCodes(string sCondition)

{

List<clsAdministrativeDivisionsCode> tempCity = new List<clsAdministrativeDivisionsCode>();

foreach (clsAdministrativeDivisionsCode temp in cityCode)

if (sCondition == temp.AdCode.Substring(0, 2))//比较省份号码的公共部分

tempCity.Add(temp);

return tempCity;//返回下属市或县 }//List<clsAdministrativeDivisionsCode> GetSomeCodes(string sCondition)

----------------核心代码-↓↓↓------------------------------------

private void btnGenID_Click(object sender, EventArgs e)

{

//省略一些检查代码

this.Cursor = Cursors.WaitCursor;//把光标设置成沙漏状

bsID.DataSource = GetID(); //获取外设组件bsID的数据源(从GetID()获得)

lbID.DataSource = bsID; //显示个身份证号

this.Cursor = Cursors.Default;//还原光标

}//void btnGenID_Click

private List<string> GetID()

{

List<string> tempID = new List<string>();

List<string> sexRndNum = GenRnd(rbMan.Checked?0:1);//单选框'男'被选中,值为0;否则为1

string str18 = string.Empty;

for (int i = 0; i < maxNum; i++)

{

string str17=string.Empty;

string sCity = cbCities.SelectedValue.ToString();//获取下属市或县的号码，共6位

string sYMD=dtpBirth.Value.Year.ToString() +

dtpBirth.Value.Month.ToString().PadLeft(2, '0') +

tpBirth.Value.Day.ToString().PadLeft(2, '0');//获取年月日，共8位

str17=sCity+sYMD+sexRndNum[i];//17位的身份证号,还需最后一位校验码

str18 = str17 + GenParityBit(str17);//18位的身份证号

tempID.Add(str18);

}

return tempID;

}//List<string> GetID()

private List<string> GenRnd(int iSex)

{

Random rd = new Random();//随机数对象

List<string> sTemp = new List<string>();

int i = 0;

while (i < maxNum)//maxNum=500;

{

int rndNum = rd.Next(0, 1000); //0<=rndNum<=999

if (rndNum % 2 == iSex) rndNum++;

if (rndNum >= 1000) continue; //if (rndNum == 1000)

string s3 = rndNum.ToString().PadLeft(3, '0');

//右对齐字符串,不满位的,在左边添加'0'填充例:002,054,586

if (!sTemp.Contains(s3))//确保没有重复的号码

{

sTemp.Add(s3);

i++;

}

}//while

return sTemp;

}// List<string> GenRnd(int iSex)

//不知道下面这些数据从哪来是正常的，是根据公式来算的

private string GenParityBit(string s17)

{

int[] Weight = new int[] { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 };

string Parity = "10X98765432";

int s = 0;

for (int i = 0; i < s17.Length; i++)

{

s += Int32.Parse(s17[i].ToString()) * Weight[i];

}

return Parity[s % 11].ToString();//返回校验码

}//string GenParityBit(string s17)

----------------核心代码-↑↑↑---------------------------------------

} //public class frmAlgorithm

验证解读部分

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代码概述

1． 事件: void btnVerification_Click(object sender, EventArgs e)

描述:首先获取输入的身份证号码,然后把它拆分成4断,分别是

1) 行政地区码(前6位),使用"bool isDiscValid(string s)"来验证.

2) 出生日期(第7位-第14位),使用" bool isBirthValid(string s)"来验证.

3) 顺序码(第15位-第17位),使用"bool isSexValid(string s)"来验证.

4) 校验码(第18位),使用" bool isParityValid(string s18)"来验证.

源代码

class clsAdministrativeDivisionsCode

{

private void btnVerification_Click(object sender, EventArgs e)

{

//省略提示……

Regex reg = new Regex(@"^\d{17}(\d|X)");//匹配18位数字,最后一位可以是数字或X

string sTemp = tbVerification.Text;

lbCardInfo.Items.Clear();

if (sTemp == string.Empty) { return; }

if (sTemp.Length != 18) { return; }

if (reg.Matches(sTemp).Count == 0) { return; }

if (!isDiscValid(sTemp.Substring(0, 6))) { return; }//验证行政地区码

if (!isBirthValid(sTemp.Substring(6, 8))) { return; }//验证生日

else

lbCardInfo.Items.Add(string.Format("出生日期：{0}年{1}月{2}日", sTemp.Substring(6, 4), sTemp.Substring(10, 2), sTemp.Substring(12, 2)));

if (!isSexValid(sTemp.Substring(14, 3))) { return; }//验证性别

else { lbCardInfo.Items.Add("性别：" + ((Convert.ToInt32(sTemp.Substring(14, 3)) % 2 == 0) ? "女" : "男")); }

if (!isParityValid(sTemp)) { return; }//验证最后一位校验码

lbCardInfo.Items.Insert(0, "身份证号：" + sTemp);

lbCardInfo.Items.Insert(0, "验证解读信息：");

lbCardInfo.Items.Add("完成验证!");

}//void btnVerification_Click

private bool isDiscValid(string s)

{

bool iFlag = false;

foreach (clsAdministrativeDivisionsCode cadc in cityCode)

{

if (cadc.AdCode == s)

{

string st = s.Substring(0, 2);

foreach (clsAdministrativeDivisionsCode capc in provinceCode)

{

if (capc.AdCode.Substring(0, 2) == st)

{

lbCardInfo.Items.Add("省或直辖市名称：" + capc.AdName);

break;

}

}//foreach

foreach (clsAdministrativeDivisionsCode caac in cityCode)

{

if (caac.AdCode == s.Substring(0, 4) + "00")

{

lbCardInfo.Items.Add("市名称：" + caac.AdName.TrimStart());

break;

}