导出QQWry.Dat中IP地址到文件[C#]

/****************************************************************** 
** File Name:IPExport.cs 
** Copyright (c) 2004-2005 PPTech Studio(PPTech.Net) 
** Creater:Rexsp(MSN:yubo@x263.net) 
** Create Date:2004-12-29 20:10:28 
** Modifier: 
** Modify Date: 
** Description:to export the ip location from qqwry.dat 
** Version: IPExport 1.0.0 
******************************************************************/ 
using System; 
using System.Collections; 
using System.Data; 
using System.IO; 
 
namespace PPTech.ESP.Component 
{ 
    /**//// <summary> 
    /// ExportData 的摘要说明。 
    /// </summary> 
    public class IPExport 
    { 
        私有成员#region 私有成员 
        private string country; 
        private string local; 
        private FileStream objfs = null; 
        private long startIp=0; 
        private long endIp=0; 
        private int countryFlag=0; 
        private long endIpOff=0; 
        #endregion 
         
        构造函数#region 构造函数 
        public IPExport() 
        { 
            // 
            // TODO: 在此处添加构造函数逻辑 
            // 
        } 
        #endregion 
 
        导出数据#region 导出数据 
        public void SaveToText(string toFilePath,string fromFilePath) 
        { 
            objfs =  new FileStream(fromFilePath, FileMode.Open, FileAccess.Read); 
            objfs.Position=0; 
            byte[] buff1 = new Byte[8] ; 
            objfs.Read(buff1,0,8); 
            int firstStartIp=buff1[0]+buff1[1]*256+buff1[2]*256*256+buff1[3]*256*256*256; 
            int lastStartIp=buff1[4]*1+buff1[5]*256+buff1[6]*256*256+buff1[7]*256*256*256; 
            long recordCount=Convert.ToInt64((lastStartIp-firstStartIp)/7.0); 
            if(recordCount<=1) 
            { 
                country="FileDataError"; 
                objfs.Close(); 
            } 
            long rangE=recordCount; 
            StreamWriter writer=File.AppendText(toFilePath); 
            for(int i=0;i<=recordCount;i++) 
            { 
                long offSet = firstStartIp+i*7; 
                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; 
                 
                objfs.Position=endIpOff; 
                byte [] buff3 = new Byte[5]; 
                objfs.Read(buff3,0,5); 
                this.endIp=Convert.ToInt64(buff3[0].ToString())+Convert.ToInt64(buff3[1].ToString())*256+Convert.ToInt64(buff3[2].ToString())*256*256+Convert.ToInt64(buff3[3].ToString())*256*256*256; 
                this.countryFlag=buff3[4]; 
                string showIP=this.IntToIP(startIp); 
                this.GetCountry(); 
                writer.WriteLine(showIP+" "+this.country+this.local); 
            } 
            writer.Close(); 
 
        } 
        #endregion 
 
        int转换成IP#region int转换成IP 
        private string  IntToIP(long ip_Int) 
        { 
            long seg1=(ip_Int&0xff000000)>>24; 
            if(seg1<0) 
                seg1+=0x100; 
            long seg2=(ip_Int&0x00ff0000)>>16; 
            if(seg2<0) 
                seg2+=0x100; 
            long seg3=(ip_Int&0x0000ff00)>>8; 
            if(seg3<0) 
                seg3+=0x100; 
            long seg4=(ip_Int&0x000000ff); 
            if(seg4<0) 
                seg4+=0x100; 
            string ip=seg1.ToString()+"."+seg2.ToString()+"."+seg3.ToString()+"."+seg4.ToString(); 
 
            return ip; 
        } 
        #endregion 
         
        获取国家/区域偏移量#region 获取国家/区域偏移量 
        private string GetCountry() 
        { 
            switch(this.countryFlag) 
            { 
                case 1: 
                case 2: 
                    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 " "; 
        } 
        #endregion 
 
        获取国家/区域字符串#region 获取国家/区域字符串 
        private string GetFlagStr(long offSet) 
        { 
            int flag=0; 
            byte [] buff = new Byte[3]; 
            while(1==1) 
            { 
                //objfs.Seek(offSet,SeekOrigin.Begin); 
                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(); 
        } 
        #endregion 
 
        GetStr#region GetStr 
        private string GetStr() 
        { 
            byte lowC=0; 
            byte upC=0; 
            string str=""; 
            byte[] buff =  new byte[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; 
        }     
        #endregion 
    } 
} 

調用方式

            测试导出IP地址库#region 测试导出IP地址库 
            IPExport exp = new IPExport(); 
            string toFile = @"D:\Work\PPTechStudio\ip.txt"; 
            string fromFile=@"E:\个人资料\IMTools\QQwryUpdate\QQWry.Dat"; 
            exp.SaveToText(toFile,fromFile); 
            #endregion