C#根据IP地址查询所属地区实例详解

ip-api.com接口（解析 json需要引入Newtonsoft.Json.dll ）：
///

/// 根据IP 获取物理地址
///

///Ip地址
///
public static string GetIpAddress(string ip)
{
string url = "
string result = "";
WebRequest wrt = null;
WebResponse wrp = null;
try
{
wrt = WebRequest.Create(url);
wrt.Credentials = CredentialCache.DefaultCredentials;

wrp = wrt.GetResponse();
StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.UTF8);
//获取到的是Json数据
string html = sr.ReadToEnd();

//Newtonsoft.Json读取数据
JObject obj = JsonConvert.DeserializeObject(html);
string city = obj["city"].ToString();
string province = obj["regionName"].ToString();
result = city.Equals(province) ? city : (province + city);
}
catch (Exception)
{
}
finally
{
if (wrp != null)
wrp.Close();
if (wrt != null)
wrt.Abort();
}
return result;
}
126.net接口：
///

/// 根据IP 获取物理地址
///

///Ip地址
///
public static string GetstringIpAddress(string ip)
{
string url = "
string result="";
WebRequest wrt = null;
WebResponse wrp = null;
try
{
wrt = WebRequest.Create(url);
wrt.Credentials = CredentialCache.DefaultCredentials;

wrp = wrt.GetResponse();
StreamReader sr = new StreamReader(wrp.GetResponseStream(), Encoding.Default);
//获取到的数据格式：var lo="江苏省", lc="镇江市"; var localAddress={city:"镇江市", province:"江苏省"}
string html = sr.ReadToEnd();
string pattern = "{city:"(?.*?)", province:"(?.*?)"}";
Regex regex = new Regex(pattern, RegexOptions.None);
Match match = regex.Match(html);
string city=match.Groups["key1"].Value;
string province=match.Groups["key2"].Value;
result = city.Equals(province) ? city : (province + city);
}
catch (Exception)
{
}
finally
{
if (wrp != null)
wrp.Close();
if (wrt != null)
wrt.Abort();
}
return result;
}
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