c#如何实现根据网络IP显示地理位置功能-创新互联
小编给大家分享一下c#如何实现根据网络IP显示地理位置功能,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!
创新互联公司网站建设由有经验的网站设计师、开发人员和项目经理组成的专业建站团队,负责网站视觉设计、用户体验优化、交互设计和前端开发等方面的工作,以确保网站外观精美、成都网站制作、做网站易于使用并且具有良好的响应性。用户信息表,是大多数系统都有的。我们也知道,通常都会有类似 注册IP 和 最后登录IP 这两个的字段,来存储用户注册时候的IP地址和最后登录的IP的地址。
获取这样的地址,在后台显示 xxx.xxx.xxx.xxx 的地址段,让人看到很不自然,根本就不知道具体地理位置。
现在我们就简单的实现一下这个功能。
用到了读取纯真IP数据库的公用组件QQWry.NET 这个组件,作者阿不。(谢谢他的共享)
还要去下载新的纯真IP地址库,下载获得QQWry.dat
最后请出Js中的小靓妞,jquery-1.3.1.js
新建Web项目AjaxIP,将QQWry.dat添加到App_Data下。
然后添加QQWry.NET的组件类,如下:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System; using System.Collections.Generic; using System.Text; using System.IO; using System.Text.RegularExpressions; using System.Net; using System.Net.Sockets; namespace AjaxIP { public class IPLocation { public string IP { get; set; } public string Country { get; set; } public string Local { get; set; } } public class QQWryLocator { static Encoding encoding = Encoding.GetEncoding("GB2312"); private byte[] data; int firstStartIpOffset; int lastStartIpOffset; int ipCount; public int Count { get { return ipCount; } } public QQWryLocator(string dataPath) { using (FileStream fs = new FileStream(dataPath, FileMode.Open, FileAccess.Read, FileShare.Read)) { data = new byte[fs.Length]; fs.Read(data, 0, data.Length); } firstStartIpOffset = (int)data[0] + (((int)data[1]) << 8) + (((int)data[2]) << 16) + (((int)data[3]) << 24); lastStartIpOffset = (int)data[4] + (((int)data[5]) << 8) + (((int)data[6]) << 16) + (((int)data[7]) << 24); ipCount = (lastStartIpOffset - firstStartIpOffset) / 7 + 1; if (ipCount <= 1) { throw new ArgumentException("ip FileDataError"); } } public static uint IpToInt(string ip) { //string[] strArray = ip.Split('.'); //return (uint.Parse(strArray[0]) << 24) + (uint.Parse(strArray[1]) << 16) + (uint.Parse(strArray[2]) << 8) + uint.Parse(strArray[0]); //return (uint)IPAddress.HostToNetworkOrder((int)(IPAddress.Parse(ip).Address)); byte[] bytes = IPAddress.Parse(ip).GetAddressBytes(); return (uint)bytes[3] + (((uint)bytes[2]) << 8) + (((uint)bytes[1]) << 16) + (((uint)bytes[0]) << 24); } public static string IntToIP(uint ip_Int) { return new IPAddress(ip_Int).ToString(); } public IPLocation Query(string ip) { IPAddress address = IPAddress.Parse(ip); if (address.AddressFamily != AddressFamily.InterNetwork) { throw new ArgumentException("不支持非IPV4的地址"); } if (IPAddress.IsLoopback(address)) { return new IPLocation() { IP = ip, Country = "本机内部环回地址", Local = string.Empty }; } uint intIP = (uint)IPAddress.HostToNetworkOrder((int)address.Address); //if ((((intIP >= IpToInt("0.0.0.0")) && (intIP <= IpToInt("2.255.255.255"))) || ((intIP >= IpToInt("64.0.0.0")) && (intIP <= IpToInt("126.255.255.255")))) || //((intIP >= IpToInt("58.0.0.0")) && (intIP <= IpToInt("60.255.255.255")))) //if (intIP <= 50331647 || (intIP >= 1073741824 && intIP <= 2130706431) || (intIP >= 973078528 && intIP <= 1023410175)) //{ // return new IPLocation() { IP = ip, Country = "网络保留地址", Local = string.Empty }; //} IPLocation ipLocation = new IPLocation() { IP = ip }; uint right = (uint)ipCount; uint left = 0; uint middle = 0; uint startIp = 0; uint endIpOff = 0; uint endIp = 0; int countryFlag = 0; while (left < (right - 1)) { middle = (right + left) / 2; startIp = GetStartIp(middle, out endIpOff); if (intIP == startIp) { left = middle; break; } if (intIP > startIp) { left = middle; } else { right = middle; } } startIp = GetStartIp(left, out endIpOff); endIp = GetEndIp(endIpOff, out countryFlag); if ((startIp <= intIP) && (endIp >= intIP)) { string local; ipLocation.Country = GetCountry(endIpOff, countryFlag, out local); ipLocation.Local = local; } else { ipLocation.Country = "未知"; ipLocation.Local = string.Empty; } return ipLocation; } private uint GetStartIp(uint left, out uint endIpOff) { int leftOffset = (int)(firstStartIpOffset + (left * 7)); endIpOff = (uint)data[4 + leftOffset] + (((uint)data[5 + leftOffset]) << 8) + (((uint)data[6 + leftOffset]) << 16); return (uint)data[leftOffset] + (((uint)data[1 + leftOffset]) << 8) + (((uint)data[2 + leftOffset]) << 16) + (((uint)data[3 + leftOffset]) << 24); } private uint GetEndIp(uint endIpOff, out int countryFlag) { countryFlag = data[4 + endIpOff]; return (uint)data[endIpOff] + (((uint)data[1 + endIpOff]) << 8) + (((uint)data[2 + endIpOff]) << 16) + (((uint)data[3 + endIpOff]) << 24); } ////// Gets the country. /// /// The end ip off. /// The country flag. /// The local. ///country private string GetCountry(uint endIpOff, int countryFlag, out string local) { string country = string.Empty; uint offset = endIpOff + 4; switch (countryFlag) { case 1: case 2: country = GetFlagStr(ref offset, ref countryFlag, ref endIpOff); offset = endIpOff + 8; local = (1 == countryFlag) ? string.Empty : GetFlagStr(ref offset, ref countryFlag, ref endIpOff); break; default: country = GetFlagStr(ref offset, ref countryFlag, ref endIpOff); local = GetFlagStr(ref offset, ref countryFlag, ref endIpOff); break; } return country; } private string GetFlagStr(ref uint offset, ref int countryFlag, ref uint endIpOff) { int flag = 0; while (true) { flag = data[offset]; //没有重定向 if (flag != 1 && flag != 2) { break; } if (flag == 2) { countryFlag = 2; endIpOff = offset - 4; } offset = (uint)data[1 + offset] + (((uint)data[2 + offset]) << 8) + (((uint)data[3 + offset]) << 16); } if (offset < 12) { return string.Empty; } return GetStr(ref offset); } ////// 读取字符串... /// /// ///private string GetStr(ref uint offset) { byte lowByte = 0; byte highByte = 0; StringBuilder stringBuilder = new StringBuilder(16); while (true) { lowByte = data[offset++]; if (lowByte == 0) { return stringBuilder.ToString(); } if (lowByte > 0x7f) { highByte = data[offset++]; if (highByte == 0) { return stringBuilder.ToString(); } stringBuilder.Append(encoding.GetString(new byte[] { lowByte, highByte })); } else { stringBuilder.Append((char)lowByte); } } } } }
再来新建 IPSearch.ashx 文件,如下:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System; using System.Collections; using System.Data; using System.Linq; using System.Web; using System.Web.Services; using System.Web.Services.Protocols; using System.Xml.Linq; namespace AjaxIP { ////// IP查询 的摘要说明 /// public class IPSearch : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; string ip = context.Request["ip"]; string ipFilePath = @"\App_Data\QQWry.dat"; QQWryLocator QQWry = new QQWryLocator(ipFilePath); IPLocation loc = QQWry.Query(ip); context.Response.Write(string.Format("{0} {1}",loc.Country,loc.Local)); } public bool IsReusable { get { return false; } } } }
最后在Default.aspx页面写下,js和有IP的用户信息,如下:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1
这样我们的后台用户信息不再是不友好的IP地址段了。
运行一下,看看效果吧.
C#是什么
C#是一个简单、通用、面向对象的编程语言,它由微软Microsoft开发,继承了C和C++强大功能,并且去掉了一些它们的复杂特性,C#综合了VB简单的可视化操作和C++的高运行效率,以其强大的操作能力、优雅的语法风格、创新的语言特性和便捷的面向组件编程从而成为.NET开发的选语言,但它不适用于编写时间急迫或性能非常高的代码,因为C#缺乏性能极高的应用程序所需要的关键功能。
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