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）文件，这个文件是ip数据库文件
2、添加以下一个类 ipscanner
{
//私有成员#region 私有成员
private string datapath;
private string ip;
private string country;
private string local;
private long firststartip = 0;
private long laststartip = 0;
private filestream objfs = null;
private long startip = 0;
private long endip = 0;
private int countryflag = 0;
private long endipoff = 0;
private string errmsg = null;
//构造函数#region 构造函数
public ipscanner()
{
this.datapath = system.web.httpcontext.current.server.mappath("/ipdata/qqwry.dat");
}
//公共属性#region 公共属性
public string datapath
{
set { datapath = value; }
}
public string ip
{
set { ip = value; }
}
public string country
{
get { return country; }
}
public string local
{
get { return local; }
}
public string errmsg
{
get { return errmsg; }
}
//搜索匹配数据#region 搜索匹配数据
private int qqwry()
{
string pattern = @"(((\\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]))";
regex objre = new regex(pattern);
match objma = objre.match(ip);
if (!objma.success)
{
this.errmsg = "ip格式错误";
return 4;
}
long ip_int = this.iptoint(ip);
int nret = 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;
}
else if ((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 = new filestream(this.datapath, filemode.open, fileaccess.read);
try
{
objfs.position = 0;
byte[] buff = new byte[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;
long recordcount = convert.toint64((laststartip - firststartip) / 7.0);
if (recordcount <= 1)
{
country = "filedataerror";
objfs.close();
return 2;
}
long range = recordcount;
long rangb = 0;
long recno = 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*！！！）", "");
}else{
nret =3;
this.country ="未知";
this.local ="";
}
objfs.close();
return nret;
}catch{
return1;
}
}// ip地址转换成int数据#region ip地址转换成int数据 privatelong iptoint(string ip)
{
char[] dot =newchar[] { '.' };
string[] iparr = ip.split(dot);
if (iparr.length ==3)
ip = ip +".0";
iparr = ip.split(dot);
long ip_int =0;
long p1 =long.parse(iparr[0]) *256*256*256;
long p2 =long.parse(iparr[1]) *256*256;
long p3 =long.parse(iparr[2]) *256;
long p4 =long.parse(iparr[3]);
ip_int = p1 + p2 + p3 + p4;
return ip_int;
}//获取起始ip范围#region 获取起始ip范围 privatelong getstartip(long recno)
{
long offset = firststartip + recno *7;
//objfs.seek(offset,seekorigin.begin); 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;
return startip;
}// 获取结束ip#region 获取结束ip privatelong getendip()
{
//objfs.seek(endipoff,seekorigin.begin); objfs.position = endipoff;
byte[] buff =new byte[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 privatestring getcountry()
{
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 privatestring getflagstr(long offset)
{
int flag =0;
byte[] buff =new byte[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;
return getstr();
}//getstr#region getstr privatestring getstr()
{
byte lowc =0;
byte upc =0;
string str ="";
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.encoding enc = system.text.encoding.getencoding("gb2312");
str += enc.getstring(buff);
}else{
str += (char)lowc;
}
}return str;
}publicstring iplocation(string ip)
{
this.ip = ip;
this.qqwry();
if (this.country.trim().contains(this.local.trim()))
returnthis.country.trim();
returnthis.country.trim() +this.local.trim();
}
}
3、asp.net根据ip获取省市地址的调用
ipscanner ipscaner = new ipscanner();
ipscaner.iplocation(ip);
string stripaddress=ipscaner.country;
希望本文所述对大家的c#程序设计有所帮助。