IP 转地址

1.需要  QQWry.Dat IP 地址数据库

2辅助类库

    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Text;
    using System.Text.RegularExpressions;
    using System.Threading.Tasks;

    namespace Utilities
   {
       /// <summary>
       /// 根据IP地址查询所在地
       /// </summary>
       public class IPScanerHelper
       {
           #region 私有成员
           private string dataPath;
           private string ip;
           private string country;
           private string local;

           private long firstStartIp = ;
           private long lastStartIp = ;
           private FileStream objfs = null;
           private long startIp = ;
           private long endIp = ;
           private int countryFlag = ;
           private long endIpOff = ;
           private string errMsg = null;
           #endregion

           #region 构造函数
           public IPScanerHelper()
           {
               //
               // TODO: 在此处添加构造函数逻辑
               //
           }
           #endregion

           #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; }
           }
           #endregion

           #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 ;
               }

               long ip_Int = this.IpToInt(ip);
               int nRet = ;
               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 = ;
               }
               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 = ;
               }
               objfs = new FileStream(this.dataPath, FileMode.Open, FileAccess.Read);
               try
               {
                   //objfs.Seek(0,SeekOrigin.Begin);
                   objfs.Position = ;
                   byte[] buff = new Byte[];
                   objfs.Read(buff, , );
                   firstStartIp = buff[] + buff[] *  + buff[] *  *  + buff[] *  *  * ;
                   lastStartIp = buff[] *  + buff[] *  + buff[] *  *  + buff[] *  *  * ;
                   long recordCount = Convert.ToInt64((lastStartIp - firstStartIp) / 7.0);
                  if (recordCount <= )
                  {
                      country = "FileDataError";
                      objfs.Close();
                      return ;
                  }
                  long rangE = recordCount;
                  long rangB = ;
                  long recNO = ;
                  while (rangB < rangE - )
                  {
                      recNO = (rangE + rangB) / ;
                      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 = ;
                      this.country = "未知";
                      this.local = "";
                  }
                  objfs.Close();
                  return nRet;
              }
              catch
              {
                  return ;
              }

          }
          #endregion

          #region IP地址转换成Int数据
          private long IpToInt(string ip)
          {
              char[] dot = new char[] { '.' };
              string[] ipArr = ip.Split(dot);
              if (ipArr.Length == )
                  ip = ip + ".0";
              ipArr = ip.Split(dot);

              long ip_Int = ;
              long p1 = long.Parse(ipArr[]) *  *  * ;
              long p2 = long.Parse(ipArr[]) *  * ;
              long p3 = long.Parse(ipArr[]) * ;
              long p4 = long.Parse(ipArr[]);
              ip_Int = p1 + p2 + p3 + p4;
              return ip_Int;
          }
          #endregion

          #region int转换成IP
          private string IntToIP(long ip_Int)
          {
              long seg1 = (ip_Int & 0xff000000) >> ;
              if (seg1 < )
                  seg1 += 0x100;
              long seg2 = (ip_Int & 0x00ff0000) >> ;
              if (seg2 < )
                  seg2 += 0x100;
              long seg3 = (ip_Int & 0x0000ff00) >> ;
              if (seg3 < )
                  seg3 += 0x100;
              long seg4 = (ip_Int & 0x000000ff);
              if (seg4 < )
                  seg4 += 0x100;
              string ip = seg1.ToString() + "." + seg2.ToString() + "." + seg3.ToString() + "." + seg4.ToString();

              return ip;
          }
          #endregion

          #region 获取起始IP范围
          private long GetStartIp(long recNO)
          {
              long offSet = firstStartIp + recNO * ;
              //objfs.Seek(offSet,SeekOrigin.Begin);
              objfs.Position = offSet;
              byte[] buff = new Byte[];
              objfs.Read(buff, , );

              endIpOff = Convert.ToInt64(buff[].ToString()) + Convert.ToInt64(buff[].ToString()) *  + Convert.ToInt64(buff[].ToString()) *  * ;
              startIp = Convert.ToInt64(buff[].ToString()) + Convert.ToInt64(buff[].ToString()) *  + Convert.ToInt64(buff[].ToString()) *  *  + Convert.ToInt64(buff[].ToString()) *  *  * ;
              return startIp;
          }
          #endregion

          #region 获取结束IP
          private long GetEndIp()
          {
              //objfs.Seek(endIpOff,SeekOrigin.Begin);
              objfs.Position = endIpOff;
              byte[] buff = new Byte[];
              objfs.Read(buff, , );
              this.endIp = Convert.ToInt64(buff[].ToString()) + Convert.ToInt64(buff[].ToString()) *  + Convert.ToInt64(buff[].ToString()) *  *  + Convert.ToInt64(buff[].ToString()) *  *  * ;
              this.countryFlag = buff[];
              return this.endIp;
          }
          #endregion

          #region 获取国家/区域偏移量
          private string GetCountry()
          {
              switch (this.countryFlag)
              {
                  case :
                  case :
                      this.country = GetFlagStr(this.endIpOff + );
                      this.local = ( == this.countryFlag) ? " " : this.GetFlagStr(this.endIpOff + );
                      break;
                  default:
                      this.country = this.GetFlagStr(this.endIpOff + );
                      this.local = this.GetFlagStr(objfs.Position);
                      break;
              }
              return " ";
          }
          #endregion

          #region 获取国家/区域字符串
          private string GetFlagStr(long offSet)
          {
              int flag = ;
              byte[] buff = new Byte[];
              while ( == )
              {
                  //objfs.Seek(offSet,SeekOrigin.Begin);
                  objfs.Position = offSet;
                  flag = objfs.ReadByte();
                  if (flag ==  || flag == )
                  {
                      objfs.Read(buff, , );
                      if (flag == )
                      {
                          this.countryFlag = ;
                          this.endIpOff = offSet - ;
                      }
                      offSet = Convert.ToInt64(buff[].ToString()) + Convert.ToInt64(buff[].ToString()) *  + Convert.ToInt64(buff[].ToString()) *  * ;
                  }
                  else
                  {
                      break;
                  }
              }
              if (offSet < )
                  return " ";
              objfs.Position = offSet;
              return GetStr();
          }
          #endregion

          #region GetStr
          private string GetStr()
          {
              byte lowC = ;
              byte upC = ;
              string str = "";
              byte[] buff = new byte[];
              while ( == )
              {
                  lowC = (Byte)objfs.ReadByte();
                  if (lowC == )
                      break;
                  if (lowC > )
                  {
                      upC = (byte)objfs.ReadByte();
                      buff[] = lowC;
                      buff[] = upC;
                      System.Text.Encoding enc = System.Text.Encoding.GetEncoding("GB2312");
                      str += enc.GetString(buff);
                  }
                  else
                  {
                      str += (char)lowC;
                  }
              }
              return str;
          }
          #endregion

          #region 获取IP地址
          public string IPLocation()
          {
              this.QQwry();
              return this.country + this.local;
          }
          public string IPLocation(string dataPath, string ip)
          {
              this.dataPath = dataPath;
              this.ip = ip;
              this.QQwry();
              return this.country + this.local;
          }
          #endregion
      }
  }

3.测试

 string IPAddress = NetHelper.GetIPAddress();
 IPScanerHelper objScan = new IPScanerHelper();
 objScan.IP = IPAddress;
 objScan.DataPath = Server.MapPath("~/Resource/IPScaner/QQWry.Dat");
 string IPAddressName =objScan.IPLocation();