/// <summary>
/// Adds a distance instance to the distances list in the DataSource
/// </summary>
/// <param name="distance"></param>
public void AddDistance(DistanceStruct distance)
{
if (IsDistanceExist(distance) == true)
{
return;
}
m_xamlImp.AddDistance(distance);
}
/// <summary>
/// Calculates distance between two address using Google Maps API. Returns -2 if no internet connection was found
/// </summary>
/// <param name="originAddress">Origin address</param>
/// <param name="destinationAddress">Destination address</param>
/// <returns></returns>
public static double CalculateDistanceGoogle(AddressStruct originAddress, AddressStruct destinationAddress)
{
if (BlValidations.CheckForInternetConnection() == false)
{
return(-2);
}
Thread.Sleep(100);//Prevents continious requests
double distanceInKm = 100.00001;
string drivingTime;
string url = @"https://maps.googleapis.com/maps/api/distancematrix/xml?units=imperial" +
"&origins=" + originAddress.ToString() +
"&destinations=" + destinationAddress.ToString() +
"&key=AIzaSyADtzLMIItcgU6_9jSifNHC8oMmDN6bpdA";
//request from Google Distance Matrix API service the distance between the 2 addresses
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
WebResponse response = request.GetResponse();
Stream dataStream = response.GetResponseStream();
StreamReader sreader = new StreamReader(dataStream);
string responsereader = sreader.ReadToEnd();
response.Close();
//the response is given in an XML format
XmlDocument xmldoc = new XmlDocument();
xmldoc.LoadXml(responsereader);
//If we have an answer
if (xmldoc.GetElementsByTagName("status")[0].ChildNodes[0].InnerText == "OK")
{
//If one of the addresses is not found
if (xmldoc.GetElementsByTagName("status")[1].ChildNodes[0].InnerText == "NOT_FOUND")
{
Console.WriteLine("one of the adrresses is not found");
}
//if 2 of the addresses are found
else
{
//the returned distance
XmlNodeList distanceXml = xmldoc.GetElementsByTagName("distance");
double distanceInMiles = Convert.ToDouble(distanceXml[0].ChildNodes[1].InnerText.Replace(" mi", ""));
distanceInKm = distanceInMiles * 1.609344;
m_xamlImp.AddDistance(new DistanceStruct(originAddress, destinationAddress, distanceInKm));
//the returned duration
XmlNodeList duration = xmldoc.GetElementsByTagName("duration");
string dur = duration[0].ChildNodes[1].InnerText;
drivingTime = dur;
}
}
//we have no answer, the web is busy, the waiting time for answer is limited (QUERY_OVER_LIMIT), we should try again (at least 2 seconds between 2 requests)
else
{
Console.WriteLine("We have'nt got an answer, maybe the net is busy...");
}
return(distanceInKm);
}
