GeoIpLocation - 如何获得州和县？ （或者，如何从邮政编码中获取州和县）C＃

Question

我正在使用一种方法从IP地址获取IipLocation对象。这是返回Location对象的代码：

public IIpLocation GetIpLocation(IPAddress ipAddress)
{
    ipAddress.CheckNull("ipAddress");

    IIpLocation ipLocation = null;
    try
    {
        //Try to look up the location using MaxMind.
        Location location = GetMaxMindIpLocation(ipAddress);

        //If the postal code is not present, then try to look it up with GeoNames.
        if (location != null && (location.PostalCode == null || location.PostalCode.Equals("")))
        {
            location.PostalCode = GetPostalCodeFromGeoNames(location);
        }

        if (location != null)
        {
            ipLocation = new GeoIpLocation(location);
        }
    }
    catch (NullReferenceException)
    {
        Log.ErrorFormat(Resources.log_maxMindLookupFailed, ipAddress);
    }

    return ipLocation;
}

IipLocation对象具有以下属性：Region，RegionName，CountryCode，City，Postal Code，Latitude，{{1 }}。但是，我需要州和县。如何从我所拥有的信息中获取州和县？

Answer 1

使用Census Block Conversions API完成此操作。

例如：

  

http://data.fcc.gov/api/block/find?format=json&latitude=28.35975&longitude=-81.421988&showall=true