如何解析深度多层的JSON数据C＃Json.Net

Question

I am looking to read data from a WeatherAPI, http://www.aerisweather.com/support/docs/api/getting-started/responses/

It has data that is several layers deep. When using Json.Net. I can parse the byte array that my WebClient.DownloadData method returns. However, my results even after parsing this byte array are 3 key value pairs with the third key value pair being the results which consists of multiple key value pairs.

Any ideas on how to address this.

My code is below:

WebClient wc = new WebClient();

            var stream = wc.DownloadData("http://api.aerisapi.com/observations/milwaukee,wi?client_id=" + id +
                "&client_secret=" + secret + "");
            Dictionary<string, Object> jsonStr = parse(stream);
            Console.ReadLine();
        }
            public static Dictionary<String, Object> parse(byte[] stream)
        {
            string jsonStr = Encoding.UTF8.GetString(stream);
            return JsonConvert.DeserializeObject<Dictionary<String, Object>>(jsonStr);
        }

Here is the third value that the api call returns.

{[response, {
  "id": "KMKE",
  "loc": {
    "long": -87.9,
    "lat": 42.95
  },
  "place": {
    "name": "milwaukee",
    "state": "wi",
    "country": "us"
  },
  "profile": {
    "tz": "America/Chicago",
    "elevM": 206,
    "elevFT": 676
  },
  "obTimestamp": 1446677520,
  "obDateTime": "2015-11-04T16:52:00-06:00",
  "ob": {
    "timestamp": 1446677520,
    "dateTimeISO": "2015-11-04T16:52:00-06:00",
    "tempC": 19,
    "tempF": 66,
    "dewpointC": 14,
    "dewpointF": 57,
    "humidity": 73,
    "pressureMB": 1016,
    "pressureIN": 30,
    "spressureMB": 992,
    "spressureIN": 29.29,
    "altimeterMB": 1017,
    "altimeterIN": 30.03,
    "windKTS": 8,
    "windKPH": 15,
    "windMPH": 9,
    "windSpeedKTS": 8,
    "windSpeedKPH": 15,
    "windSpeedMPH": 9,
    "windDirDEG": 200,
    "windDir": "SSW",
    "windGustKTS": null,
    "windGustKPH": null,
    "windGustMPH": null,
    "flightRule": "LIFR",
    "visibilityKM": 16.09344,
    "visibilityMI": 10,
    "weather": "Clear",
    "weatherShort": "Clear",
    "weatherCoded": "::CL",
    "weatherPrimary": "Clear",
    "weatherPrimaryCoded": "::CL",
    "cloudsCoded": "CL",
    "icon": "clearn.png",
    "heatindexC": 19,
    "heatindexF": 66,
    "windchillC": 19,
    "windchillF": 66,
    "feelslikeC": 19,
    "feelslikeF": 66,
    "isDay": false,
    "sunrise": 1446640242,
    "sunriseISO": "2015-11-04T06:30:42-06:00",
    "sunset": 1446676779,
    "sunsetISO": "2015-11-04T16:39:39-06:00",
    "snowDepthCM": null,
    "snowDepthIN": null,
    "precipMM": 0,
    "precipIN": 0,
    "solradWM2": null,
    "light": 0,
    "sky": 0
  },
  "raw": "KMKE 042252Z 20008KT 10SM CLR 19/14 A3003 RMK AO2 SLP169 T01890139",
  "relativeTo": {
    "lat": 43.0389,
    "long": -87.90647,
    "bearing": 177,
    "bearingENG": "S",
    "distanceKM": 9.899,
    "distanceMI": 6.151
  }
}]}

Answer 1

If you do not want to re-create the object model, you can use dynamic JObject:

static void Main(string[] args)
{
    using (var wc = new WebClient())
    {
        var stream = wc.DownloadData("http://api.aerisapi.com/observations/milwaukee,wi?client_id=xxx&client_secret=xxx");
        dynamic jsonObject = Parse(stream);
        Console.WriteLine(jsonObject.success);
        Console.WriteLine(jsonObject.error);
        Console.WriteLine(jsonObject.response);
        Console.WriteLine(jsonObject.response.place.name);
    }
    Console.ReadLine();
}
public static JObject Parse(byte[] stream)
{
    var jsonStr = Encoding.UTF8.GetString(stream);
    return JObject.Parse(jsonStr);
}

Answer 2

You should create a corresponding class (and other classes for nested objects) and then create an instance of it and call

JsonConvert.PopulateObject(jsonString, myObject);

The root object would look like

public class AerisWeatherResponse
{
    public bool success;
    public AerisWeatherError error; // a class with code and description fields
    public AerisWeatherResponseBody response;
}

And the AerisWeatherResponseBody class should look like:

public class AerisWeatherResponseBody
{
    public string id;
    public AerisWeatherLocation; // a class with long and lat fields
    public AerisWeatherPlace; // a class with name, state and country fields
    .......
    .......
}