C# Get specific object from JSON response using HttpClient

Question

I'm trying to parse json from the google maps api for geocoding.

The JSON is:

{
"results" : [
  {
     "address_components" : [
        {
           "long_name" : "1600",
           "short_name" : "1600",
           "types" : [ "street_number" ]
        },
        {
           "long_name" : "Amphitheatre Parkway",
           "short_name" : "Amphitheatre Pkwy",
           "types" : [ "route" ]
        },
        {
           "long_name" : "Mountain View",
           "short_name" : "Mountain View",
           "types" : [ "locality", "political" ]
        },
        {
           "long_name" : "Santa Clara County",
           "short_name" : "Santa Clara County",
           "types" : [ "administrative_area_level_2", "political" ]
        },
        {
           "long_name" : "California",
           "short_name" : "CA",
           "types" : [ "administrative_area_level_1", "political" ]
        },
        {
           "long_name" : "United States",
           "short_name" : "US",
           "types" : [ "country", "political" ]
        },
        {
           "long_name" : "94043",
           "short_name" : "94043",
           "types" : [ "postal_code" ]
        }
     ],
     "formatted_address" : "1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA",
     "geometry" : {
        "location" : {
           "lat" : 37.4224277,
           "lng" : -122.0843288
        },
        "location_type" : "ROOFTOP",
        "viewport" : {
           "northeast" : {
              "lat" : 37.4237766802915,
              "lng" : -122.0829798197085
           },
           "southwest" : {
              "lat" : 37.4210787197085,
              "lng" : -122.0856777802915
           }
        }
     },
     "place_id" : "ChIJ2eUgeAK6j4ARbn5u_wAGqWA",
     "types" : [ "street_address" ]
  }
 ],
"status" : "OK"
}

I'm only interested in the location object with the latitude and longitude and would like to know how to navigate the json object tree within c# to retrieve them from a HttpContent as response from a GetAsync on a HttpClient. The following code fragment illustrates how my request is done.

public async Task<Coordinates> GeoCode(string address) 
{
      HttpClient client= new HttpClient();
      var baseUrl = "http://maps.google.com/maps/api/geocode/json?address=";
      var addressEncoded = WebUtility.UrlEncode(address);
      var response= await client.GetAsync(baseUrl + addressEncoded);

      if(response.IsSuccessStatusCode)
      {
           //read location ...
      }
}

How might I read the location object?

Answer 1

Here's how I usually do it. (I saved your json object into D:/json.txt)

 var json = File.ReadAllText("D:/json.txt");
 var results = JObject.Parse(json).SelectToken("results") as JArray;

foreach (var result in results)
{
    var geometryEntry = result.SelectToken("geometry.location");
    var longitude = geometryEntry.Value<double>("lat");
    var latitude = geometryEntry.Value<double>("lng");

    Console.WriteLine("{0}, {1}", longitude, latitude);
}

Output: