导出QQWry.Dat中IP地址到文件[C#]

灵感之源语：“ 如果写个格式转换代码就更好了^_^ ”
既然如此，那……
下载CS文件： http://www.cnblogs.com/Files/rexsp/IPExport.rar

// /* *****************************************************************
** File Name:IPExport.cs
** Copyright (c) 2004-2005 PPTech Studio(PPTech.Net)
** Creater:Rexsp(MSN:[email protected])
** 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
{
// ///

1<summary>   
2![](http://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif) ///  ExportData 的摘要说明。   
3![](http://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif) ///  </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 )
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