通過ip地址獲取當前地理位置

1、 使用接口的方式：

這種方式是相對穩定，而且提供的數據相對穩定，提供接口的地方很多，大家可以參照

http://www.hujuntao.com/api/the-ip-address-api-and-call-the-interface-method.html

不一一講解，只講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

參數有兩個：format和ip

1) IP：不傳入ip值時默認為本機ip，也可以指定特定的ip地址；

2) format：返回給客戶端的數據格式有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

返回結果：var remote_ip_info = {"ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"/u4e2d/u56fd","

返回的結果給一個js變量，變量值為json格式，可以自己將Unicode字符轉碼為中文：

var remote_ip_info = {"ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"中國","province":"北京","city":"北京","district":"","isp":"電信","type":"機房","desc":"中國萬網機房電信"};

b、 返回json格式：

eg：http://int.dpool.sina.com.cn/iplookup/iplookup.php?format=json&ip=115.29.28.108

返回結果：

{"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"}

返回的結果直接是一個json格式的字符串，可以自己將Unicode字符轉碼為中文：

{"ret":1,"start":"115.28.0.0","end":"115.29.255.255","country":"中國","province":"北京","city":"北京","district":"","isp":"電信","type":"機房","desc":"中國萬網機房電信"}

代碼示例：

<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="國家">                    <ItemTemplate>                        <div style=" text-align:center"><%#Eval("Country")%></div>                    </ItemTemplate>                </asp:TemplateField>                <asp:TemplateField HeaderText="省會">                    <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="地區">                    <ItemTemplate>                        <div style=" text-align:center"><%#Eval("District")%></div>                    </ItemTemplate>                </asp:TemplateField>                 <asp:TemplateField HeaderText="運營商">                    <ItemTemplate>                        <div style=" text-align:center"><%#Eval("Isp")%></div>                    </ItemTemplate>                </asp:TemplateField>                 <asp:TemplateField HeaderText="類型">                    <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>        /// 將Unicode編碼轉換成中文        /// </summary>        /// <param name="result"></param>        /// <returns></returns>        private string ConvertUnicode2Chinese(string result)        {            Regex reg = new Regex(