C#实现身份证验证功能的示例代码

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;

}

来源：https://blog.csdn.net/qq_27489007/article/details/128306627