在JSON中反序列化多个对象不起作用

Question

因此，我正在尝试使用Google Maps API来获取两个城市之间的距离。 要查看其Json格式，请访问： https : //developers.google.com/maps/documentation/directions/start

所以我的Class对象看起来像这样

public class GeocodedWaypoint
{
    public string geocoder_status { get; set; }
    public string place_id { get; set; }
    public List<string> types { get; set; }
    public bool? partial_match { 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; }
}

我想与此一起得到腿对象

 static async Task<Leg> GetLegAsync(string path)
    {
        Leg leg = null;
        HttpResponseMessage response = await client.GetAsync(path);
        if (response.IsSuccessStatusCode)
        {
            var json = await response.Content.ReadAsStringAsync();
            leg = JsonConvert.DeserializeObject<Leg>(json);

        }

        return leg;
    }

问题是，当我通过此方法访问腿部对象时，它无法正确反序列化。 抱歉，这很简单，但是我并没有真正将HTTP客户端和类似的东西弄乱。 我对C＃相当满意，但是我过去对功能的研究还不够多，并深入其中。

编辑：如果这是有帮助的

 static async Task RunAsync(string pos1,string pos2)
    {
        string apiKey = "MUST_KEEP_HIDDEN!";

        client.BaseAddress = new Uri("https://maps.googleapis.com/maps/api/directions/json?origin="+pos1+"&destination="+pos2+"&key=" + apiKey);

        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        //Console.ReadLine();
        Leg leg = await GetLegAsync("https://maps.googleapis.com/maps/api/directions/json?origin=" + pos1 + "&destination=" + pos2 + "4&key=" + apiKey);

        showinfo(leg);

    }

提前致谢

Answer 1

使用quicktype.io生成了此代码。

jsonString是Google Maps API的API响应。

在此示例中，我使用了以下API：

https://maps.googleapis.com/maps/api/directions/json?origin=Disneyland&destination=Universal+Studios+Hollywood4&key=AIzaSyAgQqqNyauyRWXdXC1HajFHyLD1vp70FdM

// To parse this JSON data, add NuGet 'Newtonsoft.Json' then do:
//
//    using QuickType;
//
//    var data = GettingStarted.FromJson(jsonString);
//
namespace QuickType
{
    using System;
    using System.Net;
    using System.Collections.Generic;

    using Newtonsoft.Json;

    public partial class GettingStarted
    {
        [JsonProperty("routes")]
        public Route[] Routes { get; set; }

        [JsonProperty("geocoded_waypoints")]
        public GeocodedWaypoint[] GeocodedWaypoints { get; set; }

        [JsonProperty("status")]
        public string Status { get; set; }
    }

    public partial class Route
    {
        [JsonProperty("overview_polyline")]
        public Polyline OverviewPolyline { get; set; }

        [JsonProperty("copyrights")]
        public string Copyrights { get; set; }

        [JsonProperty("bounds")]
        public Bounds Bounds { get; set; }

        [JsonProperty("legs")]
        public Leg[] Legs { get; set; }

        [JsonProperty("warnings")]
        public object[] Warnings { get; set; }

        [JsonProperty("summary")]
        public string Summary { get; set; }

        [JsonProperty("waypoint_order")]
        public object[] WaypointOrder { get; set; }
    }

    public partial class Polyline
    {
        [JsonProperty("points")]
        public string Points { get; set; }
    }

    public partial class Bounds
    {
        [JsonProperty("northeast")]
        public EndLocation Northeast { get; set; }

        [JsonProperty("southwest")]
        public EndLocation Southwest { get; set; }
    }

    public partial class EndLocation
    {
        [JsonProperty("lat")]
        public double Lat { get; set; }

        [JsonProperty("lng")]
        public double Lng { get; set; }
    }

    public partial class Leg
    {
        [JsonProperty("end_location")]
        public EndLocation EndLocation { get; set; }

        [JsonProperty("duration")]
        public Distance Duration { get; set; }

        [JsonProperty("distance")]
        public Distance Distance { get; set; }

        [JsonProperty("end_address")]
        public string EndAddress { get; set; }

        [JsonProperty("start_location")]
        public EndLocation StartLocation { get; set; }

        [JsonProperty("traffic_speed_entry")]
        public object[] TrafficSpeedEntry { get; set; }

        [JsonProperty("start_address")]
        public string StartAddress { get; set; }

        [JsonProperty("steps")]
        public Step[] Steps { get; set; }

        [JsonProperty("via_waypoint")]
        public object[] ViaWaypoint { get; set; }
    }

    public partial class Distance
    {
        [JsonProperty("text")]
        public string Text { get; set; }

        [JsonProperty("value")]
        public long Value { get; set; }
    }

    public partial class Step
    {
        [JsonProperty("html_instructions")]
        public string HtmlInstructions { get; set; }

        [JsonProperty("duration")]
        public Distance Duration { get; set; }

        [JsonProperty("distance")]
        public Distance Distance { get; set; }

        [JsonProperty("end_location")]
        public EndLocation EndLocation { get; set; }

        [JsonProperty("polyline")]
        public Polyline Polyline { get; set; }

        [JsonProperty("maneuver")]
        public string Maneuver { get; set; }

        [JsonProperty("start_location")]
        public EndLocation StartLocation { get; set; }

        [JsonProperty("travel_mode")]
        public string TravelMode { get; set; }
    }

    public partial class GeocodedWaypoint
    {
        [JsonProperty("partial_match")]
        public bool? PartialMatch { get; set; }

        [JsonProperty("geocoder_status")]
        public string GeocoderStatus { get; set; }

        [JsonProperty("place_id")]
        public string PlaceId { get; set; }

        [JsonProperty("types")]
        public string[] Types { get; set; }
    }

    public partial class GettingStarted
    {
        public static GettingStarted FromJson(string json) => JsonConvert.DeserializeObject<GettingStarted>(json, Converter.Settings);
    }

    public static class Serialize
    {
        public static string ToJson(this GettingStarted self) => JsonConvert.SerializeObject(self, Converter.Settings);
    }

    public class Converter
    {
        public static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
        {
            MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
            DateParseHandling = DateParseHandling.None,
        };
    }
}