public static List<Station> FromArray(List<string[]> data)
{
List<Station> stations = new List<Station>();
foreach (string[] row in data)
{
// Convert string[] to class' fields.
string postId = row[0];
string postName = row[1];
string street = row[2];
float longitude = row[3] == @"\N" ? 0f : float.Parse(row[3], CultureInfo.InvariantCulture.NumberFormat);
float latitude = row[4] == @"\N" ? 0f : float.Parse(row[4], CultureInfo.InvariantCulture.NumberFormat);
// Add new row into DB.
Station station = new Station(postId, postName, street, longitude, latitude);
stations.Add(station);
}
return stations;
}
public Station[] GetNearestStations(double lat, double lng, int n)
{
Station[] nearestStations = new Station[n];
double[] nearestStationsDistance = new double[n];
// Fill distance arrays with MAX_DOUBLE.
for (int i = 0; i < n; i++)
nearestStationsDistance[i] = double.MaxValue;
var maxDistancePosition = 0;
var maxDistance = nearestStationsDistance[maxDistancePosition];
// Search through database.
for (int i = 0; i < Stations.Count; i++)
{
Station station = Stations[i];
// Calculate distance from our position to station's position.
double distance = GetDistance(lat, lng, station.latitude, station.longitude);
// If found new nearest station.
if (distance < maxDistance)
{
// Copy station into array.
nearestStations[maxDistancePosition] = station;
nearestStationsDistance[maxDistancePosition] = distance;
// Find new max distance.
maxDistancePosition = 0;
maxDistance = nearestStationsDistance[maxDistancePosition];
for (int j = 0; j < n; j++)
if (nearestStationsDistance[j] > maxDistance)
{
maxDistance = nearestStationsDistance[j];
maxDistancePosition = j;
}
}
}
return nearestStations;
}
public StationMarker(Station station, Marker marker)
{
_station = station;
_marker = marker;
}