ASP.NET实现根据IP获取省市地址的方法(3)

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;