欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

ASP.NET实现根据IP获取省市地址的方法

程序员文章站 2024-02-23 19:01:58
本文实例讲述了asp.net实现根据ip获取省市地址的方法,分享给大家供大家参考。具体实现方法如下: 1、在网站的跟路径下面添加qqwry.dat(点击此处本站下载)文件...

本文实例讲述了asp.net实现根据ip获取省市地址的方法,分享给大家供大家参考。具体实现方法如下:

1、在网站的跟路径下面添加qqwry.dat(点击此处本站下载)文件,这个文件是ip数据库文件

2、添加以下一个类 ipscanner

复制代码 代码如下:
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*!!!)", "");
                }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

复制代码 代码如下:
string ip="123.81.176.99";
ipscanner ipscaner = new ipscanner();
ipscaner.iplocation(ip); 
string stripaddress=ipscaner.country;

希望本文所述对大家的c#程序设计有所帮助。