思路构建

1.先通过本地的测IP地址库进行匹配

2.如果本地IP地址库存在此IP的城市信息，就直接返回，调用速度也快

3.如果本地没有对应的IP城市信息，必须通过调用网络的IP查询的API了，这里我使用了（百度，新浪，和淘宝）

注意：百度的调用不是很正常，大批量调用

 要引用dll Newtonsoft.Json.dll
 下载地址：http://www.newtonsoft.com/products/json/
 1.解压下载文件,得到Newtonsoft.Json.dll 2.在项目中添加引用.. 3.兼容.net framwork2.0到4.5框架

使用NewtonSoft.JSON.dll来序列化和发序列化对象

1        #region 调用百度  新浪和淘宝接口返回地址   1.百度 2.新浪 3.淘宝
2         /// <summary>
3         /// 调用百度  新浪和淘宝接口返回地址   1.百度 2.新浪 3.淘宝
4         /// </summary>
5         /// <param name="Serve">1.百度 2.新浪 3.淘宝</param>
6         /// <param name="ipAddress"></param>
7         /// <returns></returns>
8         public string GetAddress(int Serve, string ipAddress)
9         {
10             try
11             {
12                 var match =
13                     new Regex(@"((?:(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))\.){3}(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d))))");
14                 if (!match.IsMatch(ipAddress))
15                 {
16                     return string.Empty;
17                 }
18                 var webClient = new System.Net.WebClient();
19                 NameValueCollection postValues = null;
20                 // 向服务器发送POST数据
21                 var url = string.Empty;
22                 if (Serve == 1)
23                 {
24                     url = "http://api.map.baidu.com/location/ip";
25                     postValues = new System.Collections.Specialized.NameValueCollection
26                             {
27                                 {"ak", "MRkBd6jnGOf8O5F58KKrvit5"},
28                                 {"ip", ipAddress},
29                                 {"coor", "bd09ll"}
30                             };
31                 }
32                 else if (Serve == 2)
33                 {
34                     url = "http://int.dpool.sina.com.cn/iplookup/iplookup.php";
35                     postValues = new System.Collections.Specialized.NameValueCollection
36                             {
37                                 {"format", "json"},
38                                 {"ip", ipAddress}
39                             };
40                 }
41                 else
42                 {
43                     url = "http://ip.taobao.com/service/getIpInfo.php";
44                     postValues = new System.Collections.Specialized.NameValueCollection
45                             {
46                                 {"ip", ipAddress}
47                             };
48                 }
49
50                 byte[] responseArray = webClient.UploadValues(url, postValues);
51
52                 string response = System.Text.Encoding.UTF8.GetString(responseArray);
53
54                 var dataJson = JObject.Parse(response);  //动态解析  正常的解析无法生效
55                 string address = string.Empty;
56                 //百度接口
57                 if (Serve == 1)
58                 {
59                     if (dataJson["status"].ToString() == "0")
60                     {
61                         address = dataJson["content"]["address_detail"]["province"] + "," + dataJson["content"]["address_detail"]["city"];
62                     }
63                 }
64                 //新浪接口
65                 else if (Serve == 2)
66                 {
67                     if (dataJson["ret"].ToString() == "1")
68                     {
69                         address = dataJson["province"] + "," + dataJson["city"];
70                     }
71                 }
72                 //淘宝接口
73                 else
74                 {
75                     if (dataJson["code"].ToString() == "0")
76                     {
77                         if (!string.IsNullOrEmpty(dataJson["data"]["region"].ToString()))
78                             address = dataJson["data"]["region"] + "," + dataJson["data"]["city"];
79                     }
80                 }
81                 if (string.IsNullOrEmpty(address))
82                 {
83                     address = "局域网";
84                 }
85                 return address;
86             }
87             catch(Exception ex)
88             {
89                 Console.WriteLine(ex.Message);
90                 return string.Empty;
91             }
92         }
93         #endregion

调用方式：

ipAddressName = ipHelper.GetAddress(2, ipaddress);//调用新浪接口返回数据