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: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
}
}
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