Unity c# jsonUtility functions arent working

Question

Want to convert a object to a json string and back.

My object:

[Serializable]
public class Save
{
    public Levels PlayerLvl { get; set; }
    public int Kills { get; set; }
}

function in code:

testfunction(Save savedata) {
    //(int)savedata.PlayerLvl equals 1
    //savedata.Kills equals 5
    string json = JsonUtility.ToJson(savedata);
    debug.log(json) // json equals "{}"
}

The same happens when I get a json string and want to convert it back:

testFunction(string jsonstring) {
    //jsonstring is a valid json string that equals Save object
    Save savedata = JsonUtility.FromJson<Save>(jsonstring);
    // savedate equals a new Save object without content
}

whats wrong here?

Edit:

Json that I get:

{
    "Kills": 5,
    "PlayerLvl": 1
}

Levels enum:

public enum Levels {
    Level1 = 1,
    Level2 = 2
}

afaik JsonUtility doesn't support properties, either use fields or a different library such as Json.NET — Innat3
– Innat3, Commented Mar 12, 2020 at 10:27
remove all the get;set; as JsonUtility does not support properties. — Everts
– Everts, Commented Mar 12, 2020 at 10:30

Community · Accepted Answer · 2020-06-20 09:12:55Z

2

See from Manual: JSON Serialization

Supported types

The JSON Serializer API supports any MonoBehaviour subclass, ScriptableObject subclass, or plain class or struct with the [Serializable] attribute. When you pass in an object to the standard Unity serializer for processing, the same rules and limitations apply as they do in the Inspector: Unity serializes fields only; and types like Dictionary<> are not supported.

Unity does not support passing other types directly to the API, such as primitive types or arrays. If you need to convert those, wrap them in a class or struct of some sort.

So you want to remove all {get; set;} in order to use fields not properties

[Serializable]
public class Save
{
    public Levels PlayerLvl;
    public int Kills;
}

edited Jun 20, 2020 at 9:12

CommunityBot

11 silver badge

answered Mar 12, 2020 at 12:12

derHugo

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