ASP.NET实现根据IP获取省市地址的方法
本文实例讲述了ASP.NET实现根据IP获取省市地址的方法，分享给大家供大家参考。具体实现方法如下：
1、在网站的跟路径下面添加QQWry.dat（点击此处本站下载https://www.nhooo.com/softs/10529.html）文件，这个文件是IP数据库文件
2、添加以下一个类IPScanner
publicclassIPScanner
{
//私有成员#region私有成员
privatestringdataPath;
privatestringip;
privatestringcountry;
privatestringlocal;
privatelongfirstStartIp=0; privatelonglastStartIp=0; privateFileStreamobjfs=null; privatelongstartIp=0; privatelongendIp=0; privateintcountryFlag=0; privatelongendIpOff=0; privatestringerrMsg=null;
//构造函数#region构造函数 publicIPScanner() { this.dataPath=System.Web.HttpContext.Current.Server.MapPath("/ipdata/QQWry.dat"); }
//公共属性#region公共属性 publicstringDataPath { set{dataPath=value;} } publicstringIP { set{ip=value;} } publicstringCountry { get{returncountry;} } publicstringLocal { get{returnlocal;} } publicstringErrMsg { get{returnerrMsg;} }
//搜索匹配数据#region搜索匹配数据 privateintQQwry() { stringpattern=@"(((\\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]))"; RegexobjRe=newRegex(pattern); MatchobjMa=objRe.Match(ip); if(!objMa.Success) { this.errMsg="IP格式错误"; return4; }
longip_Int=this.IpToInt(ip); intnRet=0; 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=1; } elseif((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=1; } objfs=newFileStream(this.dataPath,FileMode.Open,FileAccess.Read); try { objfs.Position=0; byte[]buff=newByte[8]; objfs.Read(buff,0,8); firstStartIp=buff[0]+buff[1]*256+buff[2]*256*256+buff[3]*256*256*256; lastStartIp=buff[4]*1+buff[5]*256+buff[6]*256*256+buff[7]*256*256*256; longrecordCount=Convert.ToInt64((lastStartIp-firstStartIp)/7.0); if(recordCount<=1) { country="FileDataError"; objfs.Close(); return2; } longrangE=recordCount; longrangB=0; longrecNO=0; while(rangB<rangE-1) { recNO=(rangE+rangB)/2; 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=3; this.country="未知"; this.local=""; } objfs.Close(); returnnRet; }catch{ return1; } }//IP地址转换成Int数据#regionIP地址转换成Int数据privatelongIpToInt(stringip) { char[]dot=newchar[]{'.'}; string[]ipArr=ip.Split(dot); if(ipArr.Length==3) ip=ip+".0"; ipArr=ip.Split(dot);
longip_Int=0; longp1=long.Parse(ipArr[0])*256*256*256; longp2=long.Parse(ipArr[1])*256*256; longp3=long.Parse(ipArr[2])*256; longp4=long.Parse(ipArr[3]); ip_Int=p1+p2+p3+p4; returnip_Int; }//获取起始IP范围#region获取起始IP范围privatelongGetStartIp(longrecNO) { longoffSet=firstStartIp+recNO*7; //objfs.Seek(offSet,SeekOrigin.Begin); objfs.Position=offSet; byte[]buff=newByte[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; returnstartIp; }//获取结束IP#region获取结束IPprivatelongGetEndIp() { //objfs.Seek(endIpOff,SeekOrigin.Begin); objfs.Position=endIpOff; byte[]buff=newByte[5]; objfs.Read(buff,0,5); this.endIp=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; this.countryFlag=buff[4]; returnthis.endIp; }//获取国家/区域偏移量#region获取国家/区域偏移量privatestringGetCountry() { switch(this.countryFlag) { case1: case2: 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""; }//获取国家/区域字符串#region获取国家/区域字符串privatestringGetFlagStr(longoffSet) { intflag=0; byte[]buff=newByte[3]; while(1==1) { 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; returnGetStr(); }//GetStr#regionGetStrprivatestringGetStr() { bytelowC=0; byteupC=0; stringstr=""; byte[]buff=newbyte[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.Encodingenc=System.Text.Encoding.GetEncoding("GB2312"); str+=enc.GetString(buff); }else{ str+=(char)lowC; } }returnstr; }publicstringIPLocation(stringip) { this.ip=ip; this.QQwry(); if(this.country.Trim().Contains(this.local.Trim())) returnthis.country.Trim(); returnthis.country.Trim()+this.local.Trim(); } }