*身份证验证并与性别联动

1、<asp:Label runat="server" ID="Label_SUB1_F15" CssClass="liLeft" title="">身份證號<font color="red">&nbsp;*</font></asp:Label><div
        class="contentContainer">
        <asp:TextBox ID="TextBox_SUB1_F15" runat="server" MaxLength="10" onblur="ChkIdNo(this);"
            CssClass="pub_clsInputEdit TextBoxElement IDNO elementDisplayYes">
        </asp:TextBox></div>

    <asp:Label runat="server" ID="Label_SUB1_F17" CssClass="liLeft" title="">性別<font color="red">&nbsp;*</font></asp:Label><div
        class="contentContainer">
        <asp:RadioButtonList ID="RadioButtonList_SUB1_F17" runat="server" CssClass="liRight RadioButtonListElement Sex"
            RepeatDirection="Horizontal" RepeatLayout="Flow" Enabled="true">
        </asp:RadioButtonList>
    </div>

2、   <script language="javascript" type="text/javascript">
        //身份證號碼验证及与性別聯動
        function ChkIdNo(obj) {
            var txtVal = obj.value;
            if (txtVal != '') {
                if (txtVal.length < 10) {
                    alert("身份證號碼必須為10位！");
                    obj.focus();
                    obj.select();
                    return false;
                }
                else {

                    //检查是否存在
                    var xmlURL = "JsonData.ashx?t=IV&val=" + txtVal;

                    $.get(xmlURL, {}, function(result) {
                        if (result == "N") {
                            alert(document.getElementById("<%=IdErr.ClientID%>").innerText); //不正确 
                            //alert("身份證號碼不合規則！");                           
                            obj.focus();
                        }
                        else {
                            obj.value = obj.value.toUpperCase();
                        }
                    }, "text");
                }

                if (txtVal != null) {
                    var secondChar = txtVal.substr(1, 1);
                    if (secondChar != "") {
                        if (secondChar == '1') {
                            var radioList = document.getElementById("<%=RadioButtonList_SUB1_F17.ClientID%>").getElementsByTagName("input");
                            radioList[0].checked = true;
                        }
                        else {
                            var radioList = document.getElementById("<%=RadioButtonList_SUB1_F17.ClientID%>").getElementsByTagName("input");
                            radioList[1].checked = true;
                        }
                    }
                }

            }
        }
    </script>

3、添加一个JsonData.ashx文件

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using Benq.Flower.Form.CARRFORM7_V8.DAL;

namespace Benq.Flower.Form.CARRFORM7_V8
{
    public class JsonData : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            CARRFORM7 C7 = new CARRFORM7_V8.DAL.CARRFORM7();
            context.Response.ContentType = "text/plain";
            string returnValue = string.Empty;

            if (context.Request.QueryString["t"] != null)
            {
                string t = context.Request.QueryString["t"];
                string val = context.Request.QueryString["val"];

                if (t.Equals("IV"))
                {
                    #region
                    if (C7.ValidateIdentityID(val))
                    {
                        context.Response.Write("Y");
                    }
                    else
                    {
                        context.Response.Write("N");
                    }
                    #endregion
                }
            }
            context.Response.End();
        }

        public bool IsReusable
        {
            get
            {
                return true;
            }
        }
    }
}

4、验证规则

#region

        public bool ValidateIdentityID(string IdentityID)
        {
            bool valid = false;
            //先通过正则表达式验证基本格式
            if (new Regex(@"[A-Z][1-2]d{8}").Match(IdentityID).Success)
            {
                //如果格式正确，再验证最后一位检查码
                valid = ValidateCheckCharacter(IdentityID);
            }

            return valid;
        }
        //验证检查码是否正确。正确返回true, 否则返回false
        private bool ValidateCheckCharacter(string IdentityID)
        {
            bool valid = false;
            int digitalCharacter, times, multiplyResult, modulos, remainder, digitalCheckCharacter;
            string checkCharacter, checkCharacterInID;

            //1.把区域码转换成数字
            string regionPrefix = IdentityID.Substring(0, 1).ToUpper();
            string regionDigital = this.GetRegionDigitalString(regionPrefix);
            string digitalIdentityID = regionDigital + IdentityID.Remove(0, 1);

            //2.根据ID前9位（10位数字）产生正确的检查码  
            multiplyResult = 0;
            //2.1乘权数相加
            for (int i = 0; i < digitalIdentityID.Length - 1; i++)
            {
                digitalCharacter = int.Parse(digitalIdentityID.Substring(i, 1));
                //从第一位到第10位的权数分别为：1,9,8,7,6,5,4,3,2,1
                if (i == 0)
                {
                    times = 1;
                }
                else
                {
                    times = 10 - i;
                }

                //加权乘再累加
                multiplyResult += digitalCharacter * times;
            }

            //2.2除以模數10取其餘數
            modulos = 10;
            remainder = multiplyResult % modulos;
            if (remainder == 0)
            {
                checkCharacterInID = IdentityID.Substring(9, 1);
                if (remainder.ToString() == checkCharacterInID)
                {
                    valid = true;
                }
            }
            else
            {
                digitalCheckCharacter = modulos - remainder;
                checkCharacter = digitalCheckCharacter.ToString();

                //3.与字符串中最后一位检查码比较，一致说明正确，否则错误
                checkCharacterInID = IdentityID.Substring(9, 1);
                if (checkCharacter.Equals(checkCharacterInID))
                {
                    valid = true;
                }

            }
            return valid;
        }
        //根据区域码得到两位数字.因为转换规律性不强，采用硬编码，可靠
        private string GetRegionDigitalString(string regionPrefix)
        {
            string regionDigital = string.Empty;
            switch (regionPrefix)
            {
                case "A":
                    regionDigital = "10";
                    break;
                case "B":
                    regionDigital = "11";
                    break;
                case "C":
                    regionDigital = "12";
                    break;
                case "D":
                    regionDigital = "13";
                    break;
                case "E":
                    regionDigital = "14";
                    break;
                case "F":
                    regionDigital = "15";
                    break;
                case "G":
                    regionDigital = "16";
                    break;
                case "H":
                    regionDigital = "17";
                    break;
                case "I":
                    regionDigital = "34";
                    break;
                case "J":
                    regionDigital = "18";
                    break;
                case "K":
                    regionDigital = "19";
                    break;
                case "L":
                    regionDigital = "20";
                    break;
                case "M":
                    regionDigital = "21";
                    break;
                case "N":
                    regionDigital = "22";
                    break;
                case "O":
                    regionDigital = "35";
                    break;
                case "P":
                    regionDigital = "23";
                    break;
                case "Q":
                    regionDigital = "24";
                    break;
                case "R":
                    regionDigital = "25";
                    break;
                case "S":
                    regionDigital = "26";
                    break;
                case "T":
                    regionDigital = "27";
                    break;
                case "U":
                    regionDigital = "28";
                    break;
                case "V":
                    regionDigital = "29";
                    break;
                case "W":
                    regionDigital = "32";
                    break;
                case "X":
                    regionDigital = "30";
                    break;
                case "Y":
                    regionDigital = "31";
                    break;
                case "Z":
                    regionDigital = "33";
                    break;
                default:
                    throw new Exception("Invalid region character");
            }

            return regionDigital;
        }

        #endregion