ASP.NET根据IP获取省市地址

1、在网站的跟路径下面添加 QQWry.dat 文件，这个文件是IP数据库文件 2、添加以下一个类 IPScanner C# 代码 复制 public class 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("（我们一定要解放台湾！！！）", ""); } else { nRet = 3; this.country = "未知"; this.local = ""; } objfs.Close(); return nRet; } catch { return 1; } } // IP地址转换成Int数据#region IP地址转换成Int数据 private long IpToInt(string ip) { char[] dot = new char[] { ‘.‘ }; 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 private long 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 private long 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]; return this.endIp; } //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 " "; } //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.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 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; } public string IPLocation(string ip) { this.ip = ip; this.QQwry(); if (this.country.Trim().Contains(this.local.Trim())) return this.country.Trim(); return this.country.Trim() + this.local.Trim(); } } 3、ASP.NET根据IP获取省市地址的调用 C# 代码 复制 string ip="123.81.176.99"; IPScanner ipscaner = new IPScanner(); ipscaner.IPLocation(ip); string strIPAddress=ipscaner.Country;