How can I access variables store in a Json file?

Unity Engine
1

Currently, I am new to Unity and new to JSON as well, what I have to do is load a JSON file from the server then use variables that stored in it as a vector 3 to instantiate a button, but currently, I don’t know how can I access it after loading it from the server. So how can I use it as I wanted?

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;
using SimpleJSON;
using Newtonsoft.Json;
using System;

public class JSONcontroller : MonoBehaviour
{
    public GameObject obj;
    Vector3 buttonPos;
    private string url = "http://localhost:3000/coordinates/";
    string x1;
    //string y1;

    // Start is called before the first frame update
    void Start()
    {
        StartCoroutine(getData());

        Debug.Log(x1);
    }

    IEnumerator getData()
    {
        UnityWebRequest request = UnityWebRequest.Get(url);
        yield return request.SendWebRequest();
        if(request.isNetworkError||request.isHttpError)
        {
            Debug.LogError(request.error);           
        }
        else
        {
            Debug.Log("Received" + request.downloadHandler.text);
            //string jsonR = System.Text.Encoding.UTF8.GetString(request.downloadHandler.data);
            //Debug.Log(jsonR);
            var box = JsonUtility.FromJson<List<Root>>(request.downloadHandler.text);
            Debug.Log(box);
            //var coordinate = JsonConvert.DeserializeObject<List<Root>>(request.downloadHandler.text);
            //Debug.Log(coordinate
            //List<Root> coors = new List<Root>();
            //Debug.Log(coors);
            //var t = coordinate
            //string x1 = GameObject.Find("x1").GetComponent<Text>();
            //x1 = coordinate.x1
            //var coordinate = JsonConvert.DeserializeObject<List<Root>>(x1);
            //Debug.Log(coordinate.x1);

        }
    }

    public void Getcoor()
    {
        //xco = xcoor;
        //yco = ycoor;
    }

    public void Createbutton()
    {
        //float x1
        //buttonPos = new Vector3(x1, y1, 4f);
        //if (Input.GetButton("Fire1"))
        //    Instantiate(obj, buttonPos, Quaternion.identity);
2

You probably want to reach for “real” JSON parsing rather than the built-in “tiny / lite” package from Unity.

On the asset store you can get NewtonSoft JSON .NET for free.

From Json2CSharp.net you can shape your data container appropriately for deserialization.

JSONLint.com will help you validate JSON.