internal void Request(string street, string city, string stateCode, string zipCode, EventHandler requestCompletedHandler)
{
m_geo = this;
Street = street;
City = city;
StateCode = stateCode;
ZipCode = zipCode;
m_RequestCompletedHandler = requestCompletedHandler;
string url = "";
if (m_geo.Street.Length > 0)
url += "&street=" + m_geo.Street;
if (m_geo.City.Length > 0)
url += "&city=" + m_geo.City;
if (m_geo.StateCode.Length == 2)
url += "&state=" + m_geo.StateCode;
if (m_geo.ZipCode.Length >= 5)
url += (m_bYahoo ? "&zip=" : "&postalcode=") + m_geo.ZipCode;
url = m_apiURL + url;
url = url.Replace(" ", "+"); // Yahoo example shows + sign instead of spaces.
WebClient webClient = new WebClient();
try
{
#if SIMPLE
webClient.DownloadStringCompleted += RequestCompleted;
webClient.DownloadStringAsync(new Uri(url));
#else
webClient.OpenReadCompleted += RequestComplete;
webClient.OpenReadAsync(new Uri(url));
#endif
}
catch (SecurityException ex)
{
// handle synchronous exception
ex.DebugOutput();
}
}
private void OnGeoAddressClick(object sender, RoutedEventArgs e)
{
GeoAddress geo = new GeoAddress();
geo.Request(""/*street*/, ""/*city*/, ""/*stateCode*/, "01810"/*zipCode*/, GeoAddress_RequestCompleted);
}
public void RequestComplete(object sender, OpenReadCompletedEventArgs args)
#endif
{
object result = null;
try
{ // Wrap the access "results" in order to catch exceptions during an asynchronous web request
result = args.Result;
}
catch (SecurityException)
{
}
bool bNoResults = (result == null ? true : string.IsNullOrEmpty(result.ToString()));
if (args.Error != null || args.Cancelled || bNoResults)
{
if (m_RequestCompletedHandler != null)
{
if (args.Cancelled)
m_geo.ErrorMessage = "Cancelled";
else
if (bNoResults)
m_geo.ErrorMessage = "No results returned";
else
m_geo.ErrorMessage = args.Error.Message;
m_RequestCompletedHandler.Invoke(m_geo, args);
}
return;
}
//m_geo.Street
//m_geo.City
//m_geo.StateCode
//m_geo.ZipCode
m_geo.Latitude = "";
m_geo.Longitude = "";
m_geo.Precision = "";
m_geo.Warning = "";
m_geo.ErrorMessage = "";
try
{
#if SIMPLE
XDocument xmlDoc = XDocument.Parse(args.Result); // xmlDoc.Root.Name should be "geonames" or null
#else
XmlReaderSettings settings = new XmlReaderSettings();
settings.IgnoreWhitespace = true;
settings.IgnoreProcessingInstructions = true;
settings.IgnoreComments = true;
Stream stream = args.Result;
XmlReader reader = XmlReader.Create(stream, settings);
XDocument xmlDoc = XDocument.Load(reader);
#endif
if (xmlDoc.Root != null) // An non-empty result
{
var query = from item in xmlDoc.Descendants("code")
where item.Element("countryCode").Value == "US"
orderby item.Element("countryCode").Value ascending
select new GeoAddress
{
City = item.Element("name").Value,
StateCode = item.Element("adminCode1").Value,
ZipCode = item.Element("postalcode").Value,
Latitude = item.Element("lat").Value,
Longitude = item.Element("lng").Value,
};
int iCount = query.Count();
m_geo = query.First();
//List<GeoAddress> geolist = query.ToList<GeoAddress>();
//List<GeoAddress> geolist = query.Take(3).ToList<GeoAddress>();
}
m_geo.Warning = Regex.Replace(Warning, @"<(.|\n)*?>", string.Empty);
}
catch (WebException webException)
{
m_geo.ErrorMessage = webException.Message;
}
if (m_RequestCompletedHandler != null)
m_RequestCompletedHandler.Invoke(m_geo, args);
}
