protected LocationDetailsQuery QueryGoogleForLocation(string locstr)
{
System.IO.Stream Str = null;
System.IO.StreamReader srRead = null;
string retStr = null;
try {
// make a Web request
System.Type t = this.GetType();
string s = "http://maps.google.com/maps/api/geocode/xml?address=" + locstr.Replace(" ", "%20") + "&sensor=false";
System.Net.WebRequest req = System.Net.WebRequest.Create(s);
System.Net.WebResponse resp = req.GetResponse();
Str = resp.GetResponseStream();
srRead = new System.IO.StreamReader(Str);
// read all the text
retStr = srRead.ReadToEnd();
} catch (Exception ex) {
throw new Exception("Couldnt Load Data From Google : " + ex.ToString());
retStr = null;
} finally {
// Close Stream and StreamReader when done
if (srRead != null)
{
srRead.Close();
}
if (Str != null)
{
Str.Close();
}
}
LocationDetailsQuery details = new LocationDetailsQuery();
if (!(ReadResult(retStr) == "OK"))
{
details.ErrorCode = "Error Getting Status Code";
}
else
{
details.LongLat = ReadLong(retStr) + ", " + ReadLat(retStr);
details.PCode = ReadAddressComponent(retStr, "postal_code");
details.Country = ReadAddressComponent(retStr, "country", true);
}
return(details);
}
public LongLat QueryGoogleForLongLat(GoogleMapAddress add)
{
if (add == null)
{
throw new NullReferenceException("Invalid LongLat Object. Cannot Load PostCode");
}
if (add.PostCode.Split(' ').Count() > 2)
{
throw new Exception("Invalid Postcode Format");
}
LongLat retVal;
try
{
retVal = QueryLocalSourceForLongLat(add);
}
catch (Exception e) { retVal = null; }
if (retVal == null)
{
try
{
LocationDetailsQuery qr = QueryGoogleForLocation(add.ToString());
if (qr.ErrorCode != null)
{
throw new Exception("Error Loading Location Details : " + qr.ErrorCode);
}
else if (qr.LongLat == null)
{
throw new PostCodeNotFoundException("Post Code Not Found For (" + add.PostCode + "," + add.Country + ")");
}
retVal = new LongLat(qr.LongLat.Split(',')[0], qr.LongLat.Split(',')[1], add.PostCode);
}
catch (Exception ex)
{
throw new Exception("Failed to get location details");
}
}
return(retVal);
}
public GoogleMapAddress QueryGoogleForAddress(LongLat ll)
{
// if (Add == null)
// throw new NullReferenceException("Invalid Address Object. Cannot Load LongLat");
GoogleMapAddress retVal;
try
{
retVal = QueryLocalSourceForAddress(ll);
}
catch (Exception ex) { retVal = null; }
if (retVal == null)
{
try
{
LocationDetailsQuery qr = QueryGoogleForLocation(ll.ToString());
if (qr.ErrorCode != null)
{
throw new Exception("Error Loading Location Details : " + qr.ErrorCode);
}
else if (qr.PCode == null)
{
throw new PostCodeNotFoundException("Post Code Not Found For (" + ll.Longatude + ", " + ll.Latatude + ")");
}
else if (qr.Country == null)
{
throw new CountryNotFoundException("Country Not Found For (" + ll.Longatude + ", " + ll.Latatude + ")");
}
retVal = new GoogleMapAddress(qr.PCode, qr.Country);
}
catch (Exception ex)
{
throw new Exception("Failed to get location details");
}
}
return(retVal);
}
