Parsing a google directions json - xamarin

Question

I am working with google directions Api...But I am facing problems for read the Json response...Does Someone know about this Api and can help me?
I need get all route points to draw my polyline...which datas is important to get for it? How can I receive and parse it?
This is a json as example
https://maps.googleapis.com/maps/api/directions/json?origin=-22.8895625,-47.0714089&destination=-22.892376,-47.027553&key=
my code that doesn't work...
public static async Task<List<Model.Localizacao>> GetDirectionsAsync(Localizacao locUser, Localizacao locLoja)
{
using (var client = new HttpClient())
{
try
{
List<Model.Localizacao> lstLoc = new List<Model.Localizacao>();
var json = await client.GetStringAsync("https://maps.googleapis.com/maps/api/directions/json?origin=" + locUser.latitude + "," + locUser.longitude + "&destination="+ locLoja.latitude+","+locLoja.longitude+"&key="+ GOOGLEMAPSKEY);
// json = json.Substring(json.IndexOf('['));
// json = json.Substring(0, json.LastIndexOf(']') + 1);
lstLoc = JsonConvert.DeserializeObject<List<Model.Localizacao>>(json);
return lstLoc;
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
return null;
}
}
}
I really need a help
I have searched and the results hasn't helped me yet
its a xamarin forms project
Thank you

Answer 1

Don't try to pull out part of the json, deserialize the whole thing and grab the data you need from the C# object graph.
You can use json2csharp.com to generate a C# class structure.
I pasted in the json you linked to and it generated the following:
public class GeocodedWaypoint
{
public string geocoder_status { get; set; }
public string place_id { get; set; }
public List<string> types { get; set; }
}
public class Northeast
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Southwest
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Bounds
{
public Northeast northeast { get; set; }
public Southwest southwest { get; set; }
}
public class Distance
{
public string text { get; set; }
public int value { get; set; }
}
public class Duration
{
public string text { get; set; }
public int value { get; set; }
}
public class EndLocation
{
public double lat { get; set; }
public double lng { get; set; }
}
public class StartLocation
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Distance2
{
public string text { get; set; }
public int value { get; set; }
}
public class Duration2
{
public string text { get; set; }
public int value { get; set; }
}
public class EndLocation2
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Polyline
{
public string points { get; set; }
}
public class StartLocation2
{
public double lat { get; set; }
public double lng { get; set; }
}
public class Step
{
public Distance2 distance { get; set; }
public Duration2 duration { get; set; }
public EndLocation2 end_location { get; set; }
public string html_instructions { get; set; }
public Polyline polyline { get; set; }
public StartLocation2 start_location { get; set; }
public string travel_mode { get; set; }
public string maneuver { get; set; }
}
public class Leg
{
public Distance distance { get; set; }
public Duration duration { get; set; }
public string end_address { get; set; }
public EndLocation end_location { get; set; }
public string start_address { get; set; }
public StartLocation start_location { get; set; }
public List<Step> steps { get; set; }
public List<object> traffic_speed_entry { get; set; }
public List<object> via_waypoint { get; set; }
}
public class OverviewPolyline
{
public string points { get; set; }
}
public class Route
{
public Bounds bounds { get; set; }
public string copyrights { get; set; }
public List<Leg> legs { get; set; }
public OverviewPolyline overview_polyline { get; set; }
public string summary { get; set; }
public List<object> warnings { get; set; }
public List<object> waypoint_order { get; set; }
}
public class RootObject
{
public List<GeocodedWaypoint> geocoded_waypoints { get; set; }
public List<Route> routes { get; set; }
public string status { get; set; }
}