这篇文章主要为大家详细介绍了如何利用C#实现身份证验证功能，文中的示例代码讲解详细，对我们学习C#有一定的帮助，感兴趣的小伙伴可以跟随小编一起了解一下!

实践过程

效果

代码

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string strg;//数据库路径
OleDbConnection conn;//数据连接对象
OleDbCommand cmd;//OleDbCommand对象
OleDbDataReader sdr;//OleDbDataReader对象

private bool CheckCard(string cardId)//创建一个CheckCard方法用于检查身份证号码是否合法
{
if (cardId.Length == 18)//如果身份证号为18位
{
   return  CheckCard18(cardId);//调用CheckCard18方法验证
}
else if (cardId.Length == 15)   //如果身份证号为15位
{
return CheckCard15(cardId);//调用CheckCard15方法验证
}
else
{
return false;
}
}

private bool CheckCard18(string CardId)//CheckCard18方法用于检查18位身份证号码的合法性
{
long n = 0;
bool flag = false;
if (long.TryParse(CardId.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(CardId.Replace('x', '0').Replace('X', '0'), out n) == false)
return false;//数字验证
string[] Myaddress =new 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"};
for (int kk = 0; kk < Myaddress.Length;kk++ )
{
if (Myaddress[kk].ToString() == CardId.Remove(2))
{
flag = true;
}
}
if (flag)
{
return flag;
}
string Mybirth = CardId.Substring(6, 8).Insert(6, "-").Insert(4, "-");
 DateTime Mytime = new DateTime();
if (DateTime.TryParse(Mybirth, out Mytime) == false)
return false;//生日验证
string[] MyVarifyCode = ("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 = CardId.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 (MyVarifyCode[y] != CardId.Substring(17, 1).ToLower())
{
return false;//校验码验证
}
return true;//符合GB11643-1999标准
}

private bool CheckCard15(string CardId)
{
long n = 0;
bool flag = false;
if (long.TryParse(CardId, out n) == false || n < Math.Pow(10, 14))
return false;//数字验证
string[] Myaddress = new 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"};
for (int kk = 0; kk < Myaddress.Length; kk++)
{
if (Myaddress[kk].ToString() == CardId.Remove(2))
{
flag = true;
}
}
if (flag)
{
return flag;
}
string Mybirth = CardId.Substring(6, 6).Insert(4, "-").Insert(2, "-");
DateTime Mytime = new DateTime();
if (DateTime.TryParse(Mybirth, out Mytime) == false)
{
return false;//生日验证
}
return true;//符合15位身份证标准
}

private void button1_Click(object sender, EventArgs e)
{
if (txtCardID.Text == "")//如果没有输入身份证号码
{
return;  //不执行操作
}
else
{
if (CheckCard(txtCardID.Text.Trim()))//如果通过CheckCard方法验证成功
{
this.Height = 237;   //设置窗体高度
string card=txtCardID.Text.Trim();//获取输入的身份证号码
if (card.Length == 15)  //如果输入的是15位的身份证号码，需要将其转换成18位
{
int[] w = new int[] { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1 };
char[] a = new char[] { '1', '0', 'x', '9', '8', '7', '6', '5', '4', '3', '2' };
string newID = "";
int s = 0;
newID =this.txtCardID.Text.Trim().Insert(6, "19");
for (int i = 0; i < 17; i++)
{
 int k = Convert.ToInt32(newID[i]) * w[i];
 s = s + k;
}
int h = 0;
Math.DivRem(s, 11, out h);
newID = newID + a[h];
card = newID;   //最后将转换成18位的身份证号码赋值给card
}
int addnum =Convert.ToInt32(card.Remove(6));//获取身份证号码中的地址码
//连接数据库
conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data source=" + strg);
conn.Open();//打开数据库
//查找数据库中是否存在输入的身份证号码中的地址码
cmd = new OleDbCommand("select count(*) from address where AddNum="+addnum, conn);
int KK = Convert.ToInt32(cmd.ExecuteScalar());
if (KK > 0)//如果存在
{
//检索数据库
cmd = new OleDbCommand("select * from address where AddNum=" + addnum, conn);
//实例化OleDbDataReader对象
sdr = cmd.ExecuteReader();
sdr.Read();//读取该对象
string address = sdr["AddName"].ToString();//获取地址码对应的归属地
string birthday = card.Substring(6, 8);//从身份证号码中截取出公民的生日
string byear = birthday.Substring(0,4);//获取出生年份
string bmonth = birthday.Substring(4,2);//获取出生月份
if (bmonth.Substring(0, 1) == "0")//如果月份是以0开头
{
bmonth = bmonth.Substring(1,1);//去掉0
}
string bday = birthday.Substring(6,2);//获取出生“日”
if (bday.Substring(0, 1) == "0")//如果“日”以0开头
{
bday = bday.Substring(1, 1);//去掉0
}
string sex = "";//性别
if (txtCardID.Text.Trim().Length == 15)//如果输入的身份证号码是15位
{
int PP=Convert.ToInt32(txtCardID.Text.Trim().Substring(14,1))%2;//判断最后一位是奇数还是偶数
if (PP == 0)//如果是偶数
{
sex = "女";//说明身份证号码的持有者是女性
}
else
{
sex = "男";//如果是奇数则身份证号码的持有者是男性
}
}
if (txtCardID.Text.Trim().Length == 18)//如果输入的身份证号码是18位
{
int PP = Convert.ToInt32(txtCardID.Text.Trim().Substring(16, 1)) % 2;//判断倒数第二位是奇数还是偶数
if (PP == 0)//如果是偶数
{
sex = "女";//说明身份证号码的持有者是女性
}
else
{
sex = "男";//如果是奇数则身份证号码的持有者是男性
}
}
sdr.Close();//关闭OleDbDataReader连接
conn.Close();//关闭数据库连接
lblAddress.Text = address;//显示身份证持有者的归属地
lblbirthday.Text = byear + "年" + bmonth + "月" + bday + "日";//显示身份证持有者的生日
lblsex.Text = sex;//显示身份证持有者的性别
lblresult.Text = "合法的公民身份证号！";//显示验证结果
}
else
{
MessageBox.Show("公民身份证号输入有误！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
else
{
MessageBox.Show("非法公民身份证号！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}

private void button2_Click(object sender, EventArgs e)
{
txtCardID.Text = "";//清空输入框
this.Height = 78;   //设置窗体高度位78
}

private void Form1_Load(object sender, EventArgs e)
{
this.Height = 78;//设置窗体高度
//获取数据库路径
strg = Application.StartupPath.ToString();
strg = strg.Substring(0, strg.LastIndexOf("\\"));
strg = strg.Substring(0, strg.LastIndexOf("\\"));
strg += @"\db.mdb";
}
}

partial class Form1
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;

/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}

#region Windows 窗体设计器生成的代码

/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.txtCardID = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.label2 = new System.Windows.Forms.Label();
this.label3 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.label5 = new System.Windows.Forms.Label();
this.lblAddress = new System.Windows.Forms.Label();
this.lblbirthday = new System.Windows.Forms.Label();
this.lblsex = new System.Windows.Forms.Label();
this.lblresult = new System.Windows.Forms.Label();
this.SuspendLayout();
// 
// label1
// 
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(13, 13);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(65, 12);
this.label1.TabIndex = 0;
this.label1.Text = "身份证号：";
// 
// txtCardID
// 
this.txtCardID.Location = new System.Drawing.Point(76, 10);
this.txtCardID.Name = "txtCardID";
this.txtCardID.Size = new System.Drawing.Size(207, 21);
this.txtCardID.TabIndex = 1;
// 
// button1
// 
this.button1.Location = new System.Drawing.Point(289, 9);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(75, 23);
this.button1.TabIndex = 2;
this.button1.Text = "开始验证";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click);
// 
// button2
// 
this.button2.Location = new System.Drawing.Point(367, 8);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(75, 23);
this.button2.TabIndex = 3;
this.button2.Text = "重新验证";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click);
// 
// label2
// 
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(13, 53);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(65, 12);
this.label2.TabIndex = 4;
this.label2.Text = "所属地区：";
// 
// label3
// 
this.label3.AutoSize = true;
this.label3.Location = new System.Drawing.Point(37, 90);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(41, 12);
this.label3.TabIndex = 5;
this.label3.Text = "生日：";
// 
// label4
// 
this.label4.AutoSize = true;
this.label4.Location = new System.Drawing.Point(37, 129);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(41, 12);
this.label4.TabIndex = 6;
this.label4.Text = "性别：";
// 
// label5
// 
this.label5.AutoSize = true;
this.label5.Location = new System.Drawing.Point(13, 169);
this.label5.Name = "label5";
this.label5.Size = new System.Drawing.Size(65, 12);
this.label5.TabIndex = 7;
this.label5.Text = "验证结果：";
// 
// lblAddress
// 
this.lblAddress.AutoSize = true;
this.lblAddress.Location = new System.Drawing.Point(74, 53);
this.lblAddress.Name = "lblAddress";
this.lblAddress.Size = new System.Drawing.Size(0, 12);
this.lblAddress.TabIndex = 8;
// 
// lblbirthday
// 
this.lblbirthday.AutoSize = true;
this.lblbirthday.Location = new System.Drawing.Point(74, 90);
this.lblbirthday.Name = "lblbirthday";
this.lblbirthday.Size = new System.Drawing.Size(0, 12);
this.lblbirthday.TabIndex = 9;
// 
// lblsex
// 
this.lblsex.AutoSize = true;
this.lblsex.Location = new System.Drawing.Point(74, 129);
this.lblsex.Name = "lblsex";
this.lblsex.Size = new System.Drawing.Size(0, 12);
this.lblsex.TabIndex = 10;
// 
// lblresult
// 
this.lblresult.AutoSize = true;
this.lblresult.Location = new System.Drawing.Point(74, 169);
this.lblresult.Name = "lblresult";
this.lblresult.Size = new System.Drawing.Size(0, 12);
this.lblresult.TabIndex = 11;
// 
// Form1
// 
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(449, 192);
this.Controls.Add(this.lblresult);
this.Controls.Add(this.lblsex);
this.Controls.Add(this.lblbirthday);
this.Controls.Add(this.lblAddress);
this.Controls.Add(this.label5);
this.Controls.Add(this.label4);
this.Controls.Add(this.label3);
this.Controls.Add(this.label2);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.txtCardID);
this.Controls.Add(this.label1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "验证身份证号码";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
this.PerformLayout();

}

#endregion

private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox txtCardID;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Label label4;
private System.Windows.Forms.Label label5;
private System.Windows.Forms.Label lblAddress;
private System.Windows.Forms.Label lblbirthday;
private System.Windows.Forms.Label lblsex;
private System.Windows.Forms.Label lblresult;

}