Unity: 'JsonSerializer' is inaccessible due to its protection level

Question

I'm trying to JSonSerialier in Unity which I used in a stand alone Console project. However this fails on Unity.

Example:

public class MyClass
{
    public int level {get; set;}
    public float timeElapsed {get; set;}
    public string playerName {get; set;}
}

Then in some function of the code I do this:

MyClass myObject = new MyClass();
myObject.level = 1;
myObject.timeElapsed = 47.5f;
myObject.playerName = "Dr Charles Francis";
Console.WriteLine(JsonSerializer.Serialize(myObject)); 

This works perfectly fine in a code that I run using "dotnet run" on Windows.

However when I use this in one of the Unity Scripts, I get the following error:

'JsonSerializer' is inaccessible due to its protection level

So how can I use JsonSerializer in Unity?

Answer 1

The JsonSerializer seems not to work properly with Unity. I have switched to using Newtonsoft.Json instead.

What you can do to achieve the desired result is:

Define your class as you did already:

public class MyClass
{
    public int level {get; set;}
    public float timeElapsed {get; set;}
    public string playerName {get; set;}
}

Add the import to your file/class where you are using the JSON:

using Newtonsoft.Json.Linq;

And inside your processing class use the following method:

private void SendJson(MyClass _event)
{
    string json = Newtonsoft.Json.JsonConvert.SerializeObject(_event);
    byte[] jsonBytes = Encoding.UTF8.GetBytes(json);
}

The json string or jsonBytes array can be used to e.g. send it to a server.

I hope this helps - please let me know if I can be of any further help.

Answer 2

In addition to the Newtonsoft JSON library already suggest in the other answer, for simple things there's also the Unity-native JsonUtility.ToJson:

string jsonString = JsonUtility.ToJson(someClass);

You do get floating point accuracy oddities though, e.g. 0.7f may turn into 0.699999988079071 when serialized, and Newtonsoft fixes that.