使用方法:
BDQQ.Data.QQWry qq=new BDQQ.Data.QQWry("d:\\QQWry.Dat");
BDQQ.Data.IPLocation ip=qq.SearchIPLocation("127.0.0.1");//这里添写IP地址
Console.WriteLine(ip.country);//国家
Console.WriteLine(ip.area);//地区
以下是基础类文件,和IP详细数据格式类
//根据LumaQQ改写而成. using System; using System.IO; using System.Text; namespace BDQQ.Data 
...{ 
/**//**//**//// <summary> 
/// QQWry 的摘要说明。 
/// </summary> public class QQWry ...{ //第一种模式 第一种模式#region 第一种模式 /**//**//**//// <summary> /// 第一种模式 /// </summary> #endregion private const byte REDIRECT_MODE_1 = 0x01; //第二种模式 第二种模式#region 第二种模式 /**//**//**//// <summary> /// 第二种模式 /// </summary> #endregion private const byte REDIRECT_MODE_2 = 0x02; //每条记录长度 每条记录长度#region 每条记录长度 /**//**//**//// <summary> /// 每条记录长度 /// </summary> #endregion private const int IP_RECORD_LENGTH = 7; //数据库文件 数据库文件#region 数据库文件 /**//**//**//// <summary> /// 文件对象 /// </summary> #endregion private FileStream ipFile; private const string unCountry = "未知国家"; private const string unArea = "未知地区"; //索引开始位置 索引开始位置#region 索引开始位置 /**//**//**//// <summary> /// 索引开始位置 /// </summary> #endregion private long ipBegin; //索引结束位置 索引结束位置#region 索引结束位置 /**//**//**//// <summary> /// 索引结束位置 /// </summary> #endregion private long ipEnd; //IP地址对象 IP地址对象#region IP地址对象 /**//**//**//// <summary> /// IP对象 /// </summary> #endregion private IPLocation loc; //存储文本内容 存储文本内容#region 存储文本内容 /**//**//**//// <summary> /// 存储文本内容 /// </summary> #endregion private byte[] buf; //存储3字节 存储3字节#region 存储3字节 /**//**//**//// <summary> /// 存储3字节 /// </summary> #endregion private byte[] b3; //存储4字节 存储4字节#region 存储4字节 /**//**//**//// <summary> /// 存储4字节IP地址 /// </summary> #endregion private byte[] b4; //构造函数 构造函数#region 构造函数 /**//**//**//// <summary> /// 构造函数 /// </summary> /// <param name="ipfile">IP数据库文件绝对路径</param> #endregion public QQWry( string ipfile ) ...{ buf = new byte[100]; b3 = new byte[3]; b4 = new byte[4]; try ...{ ipFile = new FileStream( ipfile,FileMode.Open ); } catch( Exception ex ) ...{ throw new Exception( ex.Message ); } ipBegin = readLong4(0); ipEnd = readLong4(4); loc = new IPLocation(); } //根据IP地址搜索 根据IP地址搜索#region 根据IP地址搜索 /**//**//**//// <summary> /// 搜索IP地址搜索 /// </summary> /// <param name="ip"></param> /// <returns></returns> #endregion public IPLocation SearchIPLocation( string ip ) ...{ //将字符IP转换为字节 string[] ipSp = ip.Split('.'); if( ipSp.Length != 4 ) ...{ throw new ArgumentOutOfRangeException( "不是合法的IP地址!" ); } byte[] IP = new byte[4]; for( int i = 0; i < IP.Length ; i++ ) ...{ IP[i] = (byte)(Int32.Parse( ipSp[i] ) & 0xFF) ; } IPLocation local = null; long offset = locateIP( IP ); if( offset != -1 ) ...{ local = getIPLocation( offset ); } if( local == null ) ...{ local = new IPLocation(); local.area = unArea; local.country = unCountry; } return local; } //取得具体信息 取得具体信息#region 取得具体信息 /**//**//**//// <summary> /// 取得具体信息 /// </summary> /// <param name="offset"></param> /// <returns></returns> #endregion private IPLocation getIPLocation( long offset ) ...{ ipFile.Position = offset + 4; //读取第一个字节判断是否是标志字节 byte one = (byte)ipFile.ReadByte(); if( one == REDIRECT_MODE_1 ) ...{ //第一种模式 //读取国家偏移 long countryOffset = readLong3(); //转至偏移处 ipFile.Position = countryOffset; //再次检查标志字节 byte b = (byte)ipFile.ReadByte(); if( b == REDIRECT_MODE_2 ) ...{ loc.country = readString( readLong3() ); ipFile.Position = countryOffset + 4; } else loc.country = readString( countryOffset ); //读取地区标志 loc.area = readArea( ipFile.Position ); } else if( one == REDIRECT_MODE_2 ) ...{ //第二种模式 loc.country = readString( readLong3() ); loc.area = readArea( offset + 8 ); } else ...{ //普通模式 loc.country = readString( --ipFile.Position ); loc.area = readString( ipFile.Position ); } return loc; } //取得地区信息 取得地区信息#region 取得地区信息 /**//**//**//// <summary> /// 读取地区名称 /// </summary> /// <param name="offset"></param> /// <returns></returns> #endregion private string readArea( long offset ) ...{ ipFile.Position = offset; byte one = (byte)ipFile.ReadByte(); if( one == REDIRECT_MODE_1 || one == REDIRECT_MODE_2 ) ...{ long areaOffset = readLong3( offset + 1 ); if( areaOffset == 0 ) return unArea; else ...{ return readString( areaOffset ); } } else ...{ return readString( offset ); } } //读取字符串 读取字符串#region 读取字符串 /**//**//**//// <summary> /// 读取字符串 /// </summary> /// <param name="offset"></param> /// <returns></returns> #endregion private string readString( long offset ) ...{ ipFile.Position = offset; int i = 0; for(i = 0, buf[i]=(byte)ipFile.ReadByte();buf[i] != (byte)(0);buf[++i]=(byte)ipFile.ReadByte()); if( i > 0 ) return Encoding.Default.GetString( buf,0,i ); else return ""; } //查找IP地址所在的绝对偏移量 查找IP地址所在的绝对偏移量#region 查找IP地址所在的绝对偏移量 /**//**//**//// <summary> /// 查找IP地址所在的绝对偏移量 /// </summary> /// <param name="ip"></param> /// <returns></returns> #endregion private long locateIP( byte[] ip ) ...{ long m = 0; int r; //比较第一个IP项 readIP( ipBegin, b4 ); r = compareIP( ip,b4); if( r == 0 ) return ipBegin; else if( r < 0 ) return -1; //开始二分搜索 for( long i = ipBegin,j=ipEnd; i<j; ) ...{ m = this.getMiddleOffset( i,j ); readIP( m,b4 ); r = compareIP( ip,b4 ); if( r > 0 ) i = m; else if( r < 0 ) ...{ if( m == j ) ...{ j -= IP_RECORD_LENGTH; m = j; } else ...{ j = m; } } else return readLong3( m+4 ); } m = readLong3( m+4 ); readIP( m,b4 ); r = compareIP( ip,b4 ); if( r <= 0 ) return m; else return -1; } //读出4字节的IP地址 读出4字节的IP地址#region 读出4字节的IP地址 /**//**//**//// <summary> /// 从当前位置读取四字节,此四字节是IP地址 /// </summary> /// <param name="offset"></param> /// <param name="ip"></param> #endregion private void readIP( long offset, byte[] ip ) ...{ ipFile.Position = offset; ipFile.Read( ip,0,ip.Length ); byte tmp = ip[0]; ip[0] = ip[3]; ip[3] = tmp; tmp = ip[1]; ip[1] = ip[2]; ip[2] = tmp; } //比较IP地址是否相同 比较IP地址是否相同#region 比较IP地址是否相同 /**//**//**//// <summary> /// 比较IP地址是否相同 /// </summary> /// <param name="ip"></param> /// <param name="beginIP"></param> /// <returns>0:相等,1:ip大于beginIP,-1:小于</returns> #endregion private int compareIP( byte[] ip, byte[] beginIP ) ...{ for( int i = 0; i < 4; i++ ) ...{ int r = compareByte( ip[i],beginIP[i] ); if( r != 0 ) return r; } return 0; } //比较两个字节是否相等 比较两个字节是否相等#region 比较两个字节是否相等 /**//**//**//// <summary> /// 比较两个字节是否相等 /// </summary> /// <param name="bsrc"></param> /// <param name="bdst"></param> /// <returns></returns> #endregion private int compareByte( byte bsrc, byte bdst ) ...{ if( ( bsrc&0xFF ) > ( bdst&0xFF ) ) return 1; else if( (bsrc ^ bdst) == 0 ) return 0; else return -1; } //根据当前位置读取4字节 根据当前位置读取4字节#region 根据当前位置读取4字节 /**//**//**//// <summary> /// 从当前位置读取4字节,转换为长整型 /// </summary> /// <param name="offset"></param> /// <returns></returns> #endregion private long readLong4( long offset ) ...{ long ret = 0; ipFile.Position = offset; ret |= ( ipFile.ReadByte() & 0xFF ); ret |= ( ( ipFile.ReadByte() << 8 ) & 0xFF00 ); ret |= ( ( ipFile.ReadByte() << 16 ) & 0xFF0000 ); ret |= ( ( ipFile.ReadByte() << 24 ) & 0xFF000000 ); return ret; } //根据当前位置,读取3字节 根据当前位置,读取3字节#region 根据当前位置,读取3字节 /**//**//**//// <summary> /// 根据当前位置,读取3字节 /// </summary> /// <param name="offset"></param> /// <returns></returns> #endregion private long readLong3( long offset ) ...{ long ret = 0; ipFile.Position = offset; ret |= ( ipFile.ReadByte() & 0xFF ); ret |= ( (ipFile.ReadByte() << 8 ) & 0xFF00 ); ret |= ( (ipFile.ReadByte() << 16 ) & 0xFF0000 ); return ret; } //从当前位置读取3字节 从当前位置读取3字节#region 从当前位置读取3字节 /**//**//**//// <summary> /// 从当前位置读取3字节 /// </summary> /// <returns></returns> #endregion private long readLong3() ...{ long ret = 0; ret |= ( ipFile.ReadByte() & 0xFF ); ret |= ( (ipFile.ReadByte() << 8 ) & 0xFF00 ); ret |= ( (ipFile.ReadByte() << 16 ) & 0xFF0000 ); return ret; } //取得begin和end之间的偏移量 取得begin和end之间的偏移量#region 取得begin和end之间的偏移量 /**//**//**//// <summary> /// 取得begin和end中间的偏移 /// </summary> /// <param name="begin"></param> /// <param name="end"></param> /// <returns></returns> #endregion private long getMiddleOffset( long begin, long end ) ...{ long records = ( end - begin ) / IP_RECORD_LENGTH; records >>= 1; if( records == 0 ) records = 1; return begin + records * IP_RECORD_LENGTH; } } //class QQWry public class IPLocation ...{ public String country; public String area; public IPLocation() ...{ country = area = ""; } public IPLocation getCopy() ...{ IPLocation ret = new IPLocation(); ret.country = country; ret.area = area; return ret; } } 
} 
