Deserialize JSON String Nested Dictionary

Question

I am trying to use Riot games REST API to make a webapp in C#. I am fine with making the requests using RESTSharp but am having some problems using JSON.Net to convert the returned Json to an object. My request returns a JSON string for example:

{\"dyrus\":{\"id\":4136713,\"name\":\"Dyrus\",\"profileIconId\":23,\"summonerLevel\":1,\"revisionDate\":1376908220000}}

I want to deserialize this into an object that has attributes: id, name, profileIconID, summonerLevel and revisionDate.

The problem I am having is that the information is being deserialized as a string because the Dictionary is nested. What is the best way to just retrieve the nested Dictionary portion of the string: {\"id\":4136713,\"name\":\"Dyrus\",\"profileIconId\":23,\"summonerLevel\":1,\"revisionDate\":1376908220000} and convert it into an object?

Thanks for your help!

Edit:

Here is what I have tried:

public class LeagueUser
{
    public LeagueUser(string json)
    {
        JavaScriptSerializer serializer = new JavaScriptSerializer();
        string jsonString = (string)serializer.DeserializeObject(json);
        LeagueUser test = (LeagueUser)serializer.DeserializeObject(jsonString);
    }
    public int id { get; set; }
    public string name { get; set; }
    public long revisionDate { get; set; }
}

What have you tried so far? Did you have a look at the examples here: james.newtonking.com/json/help/index.html — mnme
– mnme, Commented Feb 21, 2014 at 15:34
Yes I have. I have deserialized it no problem into a string but do not know how to get right to the inner dictionary. — user3337833
– user3337833, Commented Feb 21, 2014 at 15:47
Please edit your question and add the code that you have tried. — ekad
– ekad, Commented Feb 21, 2014 at 15:50
Is your JSON actually escaped like that (double serialized), or is that just what is showing in the debugger? — Brian Rogers
– Brian Rogers, Commented Feb 21, 2014 at 16:13

ekad · Accepted Answer · 2014-02-21 16:07:12Z

1

You don't need the constructor, change LeagueUser class to this

public class LeagueUser
{
    public int id { get; set; }
    public string name { get; set; }
    public long revisionDate { get; set; }
}

and use Json.NET to deserialize the json into a Dictionary<string, LeagueUser>

string jsonStr = "{\"dyrus\":{\"id\":4136713,\"name\":\"Dyrus\",\"profileIconId\":23,\"summonerLevel\":1,\"revisionDate\":1376908220000}}";

var deserializedObject = JsonConvert.DeserializeObject<Dictionary<string, LeagueUser>>(jsonStr);

You can get the LeagueUser object this way

LeagueUser leagueUser = deserializedObject["dyrus"];

answered Feb 21, 2014 at 16:07

ekad

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1 Comment

user3337833 Over a year ago

Thank you so much this worked! I know I need to mark this as the answer but don't see where I do that. As soon as I find it I will!

Ilija Dimov · Accepted Answer · 2014-02-21 16:18:19Z

You can achieve what you want by creating custom converter for your LeagueUser class:

public class LeagueUserConverter : JsonConverter
{

    public override bool CanConvert(Type objectType)
    {
        return typeof(LeagueUser) == objectType;
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        if (!CanConvert(objectType)) return null;

        var jObject = JObject.Load(reader);

        var user = new LeagueUser
            {
                Id = Convert.ToInt64(jObject["dyrus"]["id"]),
                Name = jObject["dyrus"]["name"].ToString(),
                ProfileIconId = Convert.ToInt32(jObject["dyrus"]["profileIconId"]),
                SummonerLevel = Convert.ToInt32(jObject["dyrus"]["summonerLevel"]),
                RevisionDate = Convert.ToInt64(jObject["dyrus"]["revisionDate"])
            };

        return user;
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        throw new NotImplementedException();
    }
}

Next you need to decorate your class with the defined converter:

[JsonConverter(typeof(LeagueUserConverter))]
public class LeagueUser
{
    public long Id { get; set; }

    public string Name { get; set; }

    public int ProfileIconId { get; set; }

    public int SummonerLevel { get; set; }

    public long RevisionDate { get; set; }
}

And wherever you need call DeserializeObject method:

var user = JsonConvert.DeserializeObject<LeagueUser>(json);

where the json variable is the json string you posted in your question.

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