ASP.NET根据IP获取省市地址

1、在网站的跟路径下面添加 QQWry.dat 文件，这个文件是IP数据库文件

2、添加以下一个类 IPScanner

 

 

C# 代码   复制

 public class IPScanner

    {

        //私有成员#region 私有成员

        private string dataPath;

        private string ip;

        private string country;

        private string local;



        private long firstStartIp = 0;

        private long lastStartIp = 0;

        private FileStream objfs = null;

        private long startIp = 0;

        private long endIp = 0;

        private int countryFlag = 0;

        private long endIpOff = 0;

        private string errMsg = null;





        //构造函数#region 构造函数

        public IPScanner()

        {

            this.dataPath = System.Web.HttpContext.Current.Server.MapPath("/ipdata/QQWry.dat");

        }



        //公共属性#region 公共属性

        public string DataPath

        {

            set { dataPath = value; }

        }

        public string IP

        {

            set { ip = value; }

        }

        public string Country

        {

            get { return country; }

        }

        public string Local

        {

            get { return local; }

        }

        public string ErrMsg

        {

            get { return errMsg; }

        }



        //搜索匹配数据#region 搜索匹配数据

        private int QQwry()

        {

            string pattern = @"(((\\d{1,2})|(1\\d{2})|(2[0-4]\\d)|(25[0-5]))\\.){3}((\\d{1,2})|(1\\d{2})|(2[0-4]\\d)|(25[0-5]))";

            Regex objRe = new Regex(pattern);

            Match objMa = objRe.Match(ip);

            if (!objMa.Success)

            {

                this.errMsg = "IP格式错误";

                return 4;

            }



            long ip_Int = this.IpToInt(ip);

            int nRet = 0;

            if (ip_Int >= IpToInt("127.0.0.0") && ip_Int <= IpToInt("127.255.255.255"))

            {

                this.country = "本机内部环回地址";

                this.local = "";

                nRet = 1;

            }

            else if ((ip_Int >= IpToInt("0.0.0.0") && ip_Int <= IpToInt("2.255.255.255")) || (ip_Int >= IpToInt("64.0.0.0") && ip_Int <= IpToInt("126.255.255.255")) || (ip_Int >= IpToInt("58.0.0.0") && ip_Int <= IpToInt("60.255.255.255")))

            {

                this.country = "网络保留地址";

                this.local = "";

                nRet = 1;

            }

            objfs = new FileStream(this.dataPath, FileMode.Open, FileAccess.Read);

            try

            {

                objfs.Position = 0;

                byte[] buff = new Byte[8];

                objfs.Read(buff, 0, 8);

                firstStartIp = buff[0] + buff[1] * 256 + buff[2] * 256 * 256 + buff[3] * 256 * 256 * 256;

                lastStartIp = buff[4] * 1 + buff[5] * 256 + buff[6] * 256 * 256 + buff[7] * 256 * 256 * 256;

                long recordCount = Convert.ToInt64((lastStartIp - firstStartIp) / 7.0);

                if (recordCount <= 1)

                {

                    country = "FileDataError";

                    objfs.Close();

                    return 2;

                }

                long rangE = recordCount;

                long rangB = 0;

                long recNO = 0;

                while (rangB < rangE - 1)

                {

                    recNO = (rangE + rangB) /2;

                    this.GetStartIp(recNO);

                    if (ip_Int ==this.startIp)

                    {

                        rangB = recNO;

                        break;

                    }if (ip_Int >this.startIp)

                        rangB = recNO;

                    else

                        rangE = recNO;

                }this.GetStartIp(rangB);

                this.GetEndIp();

                if (this.startIp <= ip_Int &&this.endIp >= ip_Int)

                {

                    this.GetCountry();

                    this.local =this.local.Replace("（我们一定要解放台湾！！！）", "");

                }else{

                    nRet =3;

                    this.country ="未知";

                    this.local ="";

                }

                objfs.Close();

                return nRet;

            }catch{

                return1;

            }

        }// IP地址转换成Int数据#region IP地址转换成Int数据 privatelong IpToInt(string ip)

        {

            char[] dot =newchar[] { '.' };

            string[] ipArr = ip.Split(dot);

            if (ipArr.Length ==3)

                ip = ip +".0";

            ipArr = ip.Split(dot);

            long ip_Int =0;

            long p1 =long.Parse(ipArr[0]) *256*256*256;

            long p2 =long.Parse(ipArr[1]) *256*256;

            long p3 =long.Parse(ipArr[2]) *256;

            long p4 =long.Parse(ipArr[3]);

            ip_Int = p1 + p2 + p3 + p4;

            return ip_Int;

        }//获取起始IP范围#region 获取起始IP范围 privatelong GetStartIp(long recNO)

        {

            long offSet = firstStartIp + recNO *7;

            //objfs.Seek(offSet,SeekOrigin.Begin);             objfs.Position = offSet;

            byte[] buff =new Byte[7];

            objfs.Read(buff, 0, 7);

            endIpOff = Convert.ToInt64(buff[4].ToString()) + Convert.ToInt64(buff[5].ToString()) *256+ Convert.ToInt64(buff[6].ToString()) *256*256;

            startIp = Convert.ToInt64(buff[0].ToString()) + Convert.ToInt64(buff[1].ToString()) *256+ Convert.ToInt64(buff[2].ToString()) *256*256+ Convert.ToInt64(buff[3].ToString()) *256*256*256;

            return startIp;

        }// 获取结束IP#region 获取结束IP privatelong GetEndIp()

        {

            //objfs.Seek(endIpOff,SeekOrigin.Begin);             objfs.Position = endIpOff;

            byte[] buff =new Byte[5];

            objfs.Read(buff, 0, 5);

            this.endIp = Convert.ToInt64(buff[0].ToString()) + Convert.ToInt64(buff[1].ToString()) *256+ Convert.ToInt64(buff[2].ToString()) *256*256+ Convert.ToInt64(buff[3].ToString()) *256*256*256;

            this.countryFlag = buff[4];

            returnthis.endIp;

        }//获取国家/区域偏移量#region 获取国家/区域偏移量 privatestring GetCountry()

        {

            switch (this.countryFlag)

            {

                case1:

                case2:

                    this.country = GetFlagStr(this.endIpOff +4);

                    this.local = (1==this.countryFlag) ?"" : this.GetFlagStr(this.endIpOff +8);

                    break;

                default:

                    this.country =this.GetFlagStr(this.endIpOff +4);

                    this.local =this.GetFlagStr(objfs.Position);

                    break;

            }return"";

        }//获取国家/区域字符串#region 获取国家/区域字符串 privatestring GetFlagStr(long offSet)

        {

            int flag =0;

            byte[] buff =new Byte[3];

            while (1==1)

            {

                objfs.Position = offSet;

                flag = objfs.ReadByte();

                if (flag ==1|| flag ==2)

                {

                    objfs.Read(buff, 0, 3);

                    if (flag ==2)

                    {

                        this.countryFlag =2;

                        this.endIpOff = offSet -4;

                    }

                    offSet = Convert.ToInt64(buff[0].ToString()) + Convert.ToInt64(buff[1].ToString()) *256+ Convert.ToInt64(buff[2].ToString()) *256*256;

                }else{

                    break;

                }

            }if (offSet <12)

                return"";

            objfs.Position = offSet;

            return GetStr();

        }//GetStr#region GetStr privatestring GetStr()

        {

            byte lowC =0;

            byte upC =0;

            string str ="";

            byte[] buff =newbyte[2];

            while (1==1)

            {

                lowC = (Byte)objfs.ReadByte();

                if (lowC ==0)

                    break;

                if (lowC >127)

                {

                    upC = (byte)objfs.ReadByte();

                    buff[0] = lowC;

                    buff[1] = upC;

                    System.Text.Encoding enc = System.Text.Encoding.GetEncoding("GB2312");

                    str += enc.GetString(buff);

                }else{

                    str += (char)lowC;

                }

            }return str;

        }publicstring IPLocation(string ip)

        {

            this.ip = ip;

            this.QQwry();

            if (this.country.Trim().Contains(this.local.Trim()))

                returnthis.country.Trim();

            returnthis.country.Trim() +this.local.Trim();

        }

    }

3、ASP.NET根据IP获取省市地址的调用

 

 

C# 代码   复制

  string ip="123.81.176.99";

  IPScanner ipscaner = new IPScanner();

  ipscaner.IPLocation(ip);

  string strIPAddress=ipscaner.Country;