C#编程：正则表达式验证身份证校验码-10

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.Text.RegularExpressions;

namespace IDCard

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

//参考：http://baike.baidu.com/item/%E8%BA%AB%E4%BB%BD%E8%AF%81%E6%A0%A1%E9%AA%8C%E7%A0%81

//校验长度和数字合法性

string regular = @"\d{17}[\d|X]{1}";

bool ret = false;

Regex regex = new Regex(regular);

ret = regex.IsMatch(textBox1.Text);

//校验位合法性

if (ret == true)

{

int sum = 0;

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

string str = textBox1.Text;

for (int i = 0; i < 17; i++)

{

sum += a[i] * (int)(str[i]-48);//0的assii码为48

}

int mod = sum % 11;

int[] b = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

char[] c = { '1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2' };

char verify='0';

for (int i=0; i<11 ;i++)

{

if (mod == b[i])

{

verify = c[i];

break;

}

if ((char)str[17] == verify)

{

ret = true;

}

else

{

ret = false;

}

MessageBox.Show(ret.ToString());

}

private void Form1_Load(object sender, EventArgs e)

{

textBox1.Text = "34052419800101001X";

}

巴特西

C#编程：正则表达式验证身份证校验码-10

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