Communicate Unity application via a series of Json

Question

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 1

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 = <any id>;
data.payload = new Payload() { imageUrl = <any url>, text = <any text> };
string json = JsonUtility.ToJson(data);

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

var data = JsonUtility.FromJson<Data >(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 = <any id>;
data.payload = new Payload() { imageUrl = <any url>, text = <any text> };
data.option= new Option() { option01 = 1, option02 = 2 };
string json = JsonUtility.ToJson(data,true);

• user1509674: Thanks a lot for your help. Its working fine. I have a dout the output is getting displayed as {"id":1,"payload":{"text":"wwwwwww","image":"hello"}} in a single line .how can I display the message as the json structure as mentioned in the question
• Shautieh: @user1509674 I think what you are looking for is printing a "beautified" version of the JSON, cf. stackoverflow.com/questions/6178544/how-can-i-beautify-a-json
• user1509674: @Shautieh : I went through the link you provided,but Newtonsoft.Json is a paid library right.Is there any other library.Here I have used LitJson and SimpleJSON
• Shautieh: @user1509674 The second answer seems good enough: markdavidrogers.com/… . Otherwise I'm not using one so I can't recommend any, but there should be plenty just googling "c# json beautifier"!
• tc07: @user1509674 : Hey, I edited my answer, just take a look.