c# - Communicate Unity application via a series of Json

I am working on communicating unity application via a series of Json. Since I am new to JSON, I don't have any idea how that work with Wnity.

Here is my JSON structure

{

    "id": “id",
    "payload": {
            “image”: "Image Url”
            "text":"text message"
            "option" : {
               "option1":"1" ,
               "option2": "2"
                }
    }

}

Now I have created a button in Unity scene. I have hardcoded the image and text data. When I click on the button the data should get converted into Json and should send JSON data to the server and print a data log message.

I have used this code.Iam getting the output

using UnityEngine;
using System.Collections;
using LitJson;
using System.IO;
public class JsonScript : MonoBehaviour {
JsonData json;
void Start()

{
    Data data = new Data();
    data.id = 1;
    data.payload = new Payload() { text = "wwwwwww", image = "hello" };
    //json = JsonMapper.ToJson(data) ;
    string json = JsonUtility.ToJson(data);
    P (json);
    //      P(json + "\t\n");

 }


// Use this for initialization
void P(string aText)
{
    print (aText +"\n");
}

}

  [System.Serializable]
 public class Payload

  {
    public string text;
       public string image;
 }

     [System.Serializable]
    public class Data
  {
        public int id;
        public Payload payload;

  }

The output is getting displayed in a single line

{"id":1,"payload":{"text":"wwwwwww","image":"hello"}}

But I need the output to be printed as the Json format.I tried giving space.

Can anybody please help me out?

Answer

https://docs.unity3d.com/Manual/JSONSerialization.html
The documentation has very detailed explaination. In your case the classes/structures (that store data ) should look like:

[Serializable]

public class Payload
{
    public string imageUrl;
    public string text;
}

[Serializable]
public class Data
{
    public int id;

    public Payload payload;
}

Mark them with Serializable attribute so that they can be serialized.
To serialize it , you do:

Data data = new Data();
data.id = ;
data.payload = new Payload() { imageUrl = , text =  };

string json = JsonUtility.ToJson(data);

And to convert the json string back into data you do:

var data = JsonUtility.FromJson(json);

That's it, hope this helps.

---

Edit 01: Pretty format JSON
(in the same documentation as above )

Controlling the output of ToJson()

ToJson supports pretty-printing the JSON output. It is off by default but you can turn it on by passing true as the second parameter.

So i guess all you need to do is just :

string json = JsonUtility.ToJson(data,true);

Honestly, I havent tried it yet but I do believe in what the documentation says :D

---

Edit02 :

[Serializable]
public class Option

{
    public int option01;
    public int option02;
}
[Serializable]
public class Payload
{
    public string imageUrl;
    public string text;
}


[Serializable]
public class Data
{
    public int id;
    public Payload payload;
    public Option option;
}

Data data = new Data();

data.id = ;
data.payload = new Payload() { imageUrl = , text =  };
data.option= new Option() { option01 = 1, option02 = 2 };

string json = JsonUtility.ToJson(data,true);