通过ip地址获取当前地理位置
1、 使用接口的方式：
这种方式是相对稳定，而且提供的数据相对稳定，提供接口的地方很多，大家可以参照
http://www.hujuntao.com/api/the-ip-address-api-and-call-the-interface-method.html
不一一讲解，只讲解一下新浪提供的接口：
新浪接口地址：http://int.dpool.sina.com.cn/iplookup/iplookup.php
参数有两个：format和ip
1) IP：不传入ip值时默认为本机ip，也可以指定特定的ip地址；
2) format：返回给客户端的数据格式有js和json格式：
a、 返回js格式：
eg：http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=js&ip=115.29.28.108
返回结果：var remote_ip_info = {"ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"\u4e2d\u56fd","province":"\u5317\u4eac","city":"\u5317\u4eac","district":"","isp":"\u7535\u4fe1","type":"\u673a\u623f","desc":"\u4e2d\u56fd\u4e07\u7f51\u673a\u623f\u7535\u4fe1"};
返回的结果给一个js变量，变量值为json格式，可以自己将Unicode字符转码为中文：
var remote_ip_info = {"ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"中国","province":"北京","city":"北京","district":"","isp":"电信","type":"机房","desc":"中国万网机房电信"};
b、 返回json格式：
eg：http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip=115.29.28.108
返回结果：
{"ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"\u4e2d\u56fd","province":"\u5317\u4eac","city":"\u5317\u4eac","district":"","isp":"\u7535\u4fe1","type":"\u673a\u623f","desc":"\u4e2d\u56fd\u4e07\u7f51\u673a\u623f\u7535\u4fe1"}
返回的结果直接是一个json格式的字符串，可以自己将Unicode字符转码为中文：
{"ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"中国","province":"北京","city":"北京","district":"","isp":"电信","type":"机房","desc":"中国万网机房电信"}
代码示例：
<div>
<asp:GridView ID="gvDetail" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None"
Width="100%" AutoGenerateColumns="false">
<AlternatingRowStyle BackColor="White" />
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" />
<Columns>
<asp:TemplateField HeaderText="IP地址">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("IP")%></div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="国家">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("Country")%></div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="省会">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("Province")%></div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="城市">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("City")%></div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="地区">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("District")%></div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="运营商">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("Isp")%></div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="类型">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("Type")%></div>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="描述">
<ItemTemplate>
<div style=" text-align:center"><%#Eval("Desc")%></div>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
var ips = new List<string>(); ips.Add("101.36.93.107"); ips.Add("106.117.102.99"); ips.Add("111.206.170.45"); ips.Add("114.86.246.202"); ips.Add("116.55.250.58"); ips.Add("182.108.206.70"); ips.Add("36.250.249.232"); var list = new List<IPDetail>(); if (ips != null && ips.Count > 0) { foreach (var ip in ips) { var rs = 0; NameValueCollection vc = new NameValueCollection(); vc.Add("format", "json"); vc.Add("ip", ip); string result = WebUtils.PostDataToUrl(postUrl, Encoding.UTF8, vc); result = ConvertUnicode2Chinese(result); if (!Int32.TryParse(result, out rs)) { JObject obj = (JObject)JsonConvert.DeserializeObject(result); if (obj != null) { var ipd = new IPDetail(); ipd.IP = ip; ipd.Country = obj["country"].ToString(); ipd.Province = obj["province"].ToString(); ipd.City = obj["city"].ToString(); ipd.District = obj["district"].ToString(); ipd.Isp = obj["isp"].ToString(); ipd.Type = obj["type"].ToString(); ipd.Desc = obj["desc"].ToString(); list.Add(ipd); } } } } gvDetail.DataSource = list; gvDetail.DataBind();
/// <summary> /// 将Unicode编码转换成中文 /// </summary> /// <param name="result"></param> /// <returns></returns> private string ConvertUnicode2Chinese(string result) { Regex reg = new Regex(@"(?i)\\[uU]([0-9a-f]{4})"); return reg.Replace(result, delegate(Match m) { return ((char)Convert.ToInt32(m.Groups[1].Value, 16)).ToString(); }); }
/// <summary> /// POST数据到指定地址 /// </summary> /// <param name="url"></param> /// <param name="encoding"></param> /// <param name="data"></param> /// <returns></returns> public static string PostDataToUrl(string url, System.Text.Encoding encoding, System.Collections.Specialized.NameValueCollection data) { //设置HttpWebRequest System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(new Uri(url)); request.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; .NET CLR 1.1.4322; .NET CLR 2.0.50727)"; request.ContentType = "application/x-www-form-urlencoded"; request.Method = "POST"; request.KeepAlive = false; byte[] buffer; using (System.IO.MemoryStream ms = new System.IO.MemoryStream()) { for (int i = 0; i < data.Count; i++) { buffer = encoding.GetBytes(data.Keys[i]); if (i > 0) ms.WriteByte(Convert.ToByte('&')); ms.Write(buffer, 0, buffer.Length); ms.WriteByte(Convert.ToByte('=')); buffer = encoding.GetBytes(HttpUtility.UrlEncode(data[i])); ms.Write(buffer, 0, buffer.Length); } buffer = ms.ToArray(); } request.ContentLength = buffer.Length; using (System.IO.Stream requestStream = request.GetRequestStream()) { requestStream.Write(buffer, 0, buffer.Length); requestStream.Close(); } try { //获取数据 using (System.Net.HttpWebResponse response = (System.Net.HttpWebResponse)(request.GetResponse())) using (System.IO.Stream stream = response.GetResponseStream()) using (System.IO.StreamReader reader = new System.IO.StreamReader(stream, encoding)) { string result = reader.ReadToEnd(); reader.Close(); stream.Close(); response.Close(); return result; } } finally { request.Abort(); } }
运行效果：
2、 直接请求网页：
这种方式很不建议使用，从网页生扒html信息，很不稳定，一旦别人的网页模板或者样式一旦改变，自己的代码也要跟着改变，很头痛的，一般都不建议采用这种方式，能够找到接口的最好用别人提供的api，下面提供一个地址让有兴趣的人去研究一下：
