C#安卓列表返回NULL - JSON API

Question

我有个问题..如果我使用字符串来显示JSON请求

string json2 = @" {
""Summoner_Id"": [{
    ""name"": ""Fiora's Inquisitors"",
    ""tier"": ""GOLD"",
    ""queue"": ""RANKED_SOLO_5x5"",
    ""entries"": [{
        ""playerOrTeamId‌​"": ""585709"",
        ""playerOrTeamName"": ""AP Ezreal Mid"",
        ""division"": ""IV"",
        ""leaguePoints"": 61,
        ""wins"": 175,
        ""losses"": 158,
        ""isHotStreak"": false,
        ""isVeteran"": false,
        ""isFreshBlood"": false,
        ""isInactive"": false
    }]
 }]
 }";  

我可以反序列化..

  var root = JsonConvert.DeserializeObject<RootObject>(json);
  var s = root.Summoner_Id[0].queue.ToString();

其中s返回值"RANKED_SOLO_5x5“

现在这一切都很好，但问题是如果我使用我的url到json..

   string url = "https://oce.api.pvp.net/api/lol/oce/v2.5/league/by-summoner/585709/entry?api_key=" + KEY;
    JsonValue json = await JSONAsync(url);


 private async Task<JsonValue> JSONAsync(string url)
    {
        // Create an HTTP web request using the URL:
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(new Uri(url));
        request.ContentType = "application/json";
        request.Method = "GET";

        // Send the request to the server and wait for the response:
        using (WebResponse response = await request.GetResponseAsync())
        {
            // Get a stream representation of the HTTP web response:
            using (Stream stream = response.GetResponseStream())
            {
                // Use this stream to build a JSON document object:
                JsonValue jsonDoc = await Task.Run(() => JsonObject.Load(stream));
                Console.Out.WriteLine("Response: {0}", jsonDoc.ToString());

                // Return the JSON document:
                return jsonDoc;
            }
        }
    }

然后尝试反序列化..

 var root = JsonConvert.DeserializeObject<RootObject>(json);
        var s = root.Summoner_Id[0].queue.ToString();

它抛出一个错误：

System.NullReferenceException: Object reference not set to an instance of an object

这是我的班级。

public class Entry
{
    public string playerOrTeamId { get; set; }
    public string playerOrTeamName { get; set; }
    public string division { get; set; }
    public int leaguePoints { get; set; }
    public int wins { get; set; }
    public int losses { get; set; }
    public bool isHotStreak { get; set; }
    public bool isVeteran { get; set; }
    public bool isFreshBlood { get; set; }
    public bool isInactive { get; set; }
}

public class SummonerId
{
    public string name { get; set; }
    public string tier { get; set; }
    public string queue { get; set; }
    public List<Entry> entries { get; set; }
}

public class RootObject
{
    public List<SummonerId> Summoner_Id { get; set; }
}

提前感谢！:)

Answer 1

public class RootObject
{
[JsonProperty("585709")]
public List<SummonerId> Summoner_Id     { get; set; }
}

这解决了我的问题。RootObject是一个导致错误的数字。谢谢，大卫！