koobas.hobune.stream
[SOLVED] Converting a Generic List to JSON in Unity
Hello programmers,
I am a beginner and I searched and tried some solutions, but it didn't fit / solved my case.
I guess this is simple, but I didn't came to an answer yet. Hope you guys could help me.
Ok, I have this Class and Object for a 2D Tile Map creator:
public class Columns
{
public int[] lines;
}
public Columns[] tilesMap;
After putting some numbers to the 'int' lists I wanted to save it as a .JSON.
I followed the tutorial, that works fine with others classes, but when I did this:
string dataAsJson = JsonUtility.ToJson(tilesMap);
string filePath = Application.dataPath + "/Maps/" + generatedLevelFileName + ".json";
File.WriteAllText(filePath, dataAsJson);
I simply, get this:
Example File: "Application.dataPath/Maps/level1.json" Content:
{}
Thanks in advance!
I found a great way to serialize generic lists. This works at least on Unity version 2020.3.
using System.Collections.Generic;
using UnityEngine;
[System.Serializable]
public class SerializableList<T> {
public List<T> list;
}
public class ListToJsonExample : MonoBehaviour {
[SerializeField] private SerializableList<string> names;
private void Awake() {
names.list.Add("Mark");
names.list.Add("Luke");
string json = JsonUtility.ToJson(names);
Debug.Log(json);
}
}
Prints:
{"list":["Mark","Luke"]}
This works! Thank you! I also add an extension function for the List. Hope this helps.
public static class ListExtention {
public static SerializableList<T> ToSerializable<T>(this List<T> list)
{
return new SerializableList<T>() {list = list};
}
}
I am having the same problem. My code is a bit longer, but I am trying to save the names of my gameobjects in a Json formatted list... I'm having no luck figuring out what my problem is on the forums. When I go to convert the list, Json just returns "{ }". Here is my code:
[Serializable] public class SaveLoad : Inventory {
private static GameObject player;
private static System.Collections.Generic.List<string> Wpns = new System.Collections.Generic.List<string>();
private static System.Collections.Generic.List<string> Cnsm = new System.Collections.Generic.List<string>();
private static System.Collections.Generic.List<string> Keys = new System.Collections.Generic.List<string>();
private static System.Collections.Generic.List<string> Placeholder = new System.Collections.Generic.List<string>();
private static System.Collections.Generic.List<int> PlySas = new System.Collections.Generic.List<int>();
private static System.Collections.Generic.List<int> IsoSas = new System.Collections.Generic.List<int>();
private static string nameHolder;
private static string json;
private static string SAVE_FILE;
protected static void Save() {
SAVE_FILE = Stats.PlayerName + ".json";
/////Convert each to list/////
if (Wpns != null)
{
Wpns.Clear();
}
Wpns = ToList(Inventory.Weapons);
SaveJSON("Weapons", Wpns);
if (Keys != null)
{
Keys.Clear();
}
Keys = ToList(Inventory.KeyItems);
SaveJSON("KeyItems", Keys);
if (Cnsm != null)
{
Cnsm.Clear();
}
Cnsm = ToList(Inventory.Consumables);
SaveJSON("Consumables", Cnsm);
////Save in as JSON////
}
private static System.Collections.Generic.List<string> ToList(GameObject[] array)
{
if (Placeholder != null)
{
Placeholder.Clear();
}
Placeholder = new System.Collections.Generic.List<string>();
for (int i = 0; i <= (array.Length - 1); i++)
{
if (array[i])
{
nameHolder = array[i].name;
Placeholder.Add(nameHolder);
}
}
return Placeholder;
}
private static void SaveJSON(string type, System.Collections.Generic.List<string> list )
{
json = JsonUtility.ToJson(list);
print(json + " " + type);
string filename = Path.Combine(Application.persistentDataPath, type + SAVE_FILE);
if (File.Exists(filename)) {
File.Delete(filename);
}
File.WriteAllText(filename, json);
}
}
I solved my problem by Serializing my classes.
[Serializable]
public class $$anonymous$$yClass
{
public int level;
public float timeElapsed;
public string playerName;
}
For more info look at this: JSON Serialization
i wanted to convert the list to JSON so i did something like this
[System.Serializable]
public class _Recentplayers
{
public List<_UserDetails> m_recent_players;
}
[System.Serializable]
public class _UserDetails
{
public string m_username;
public string m_my_name;
}
And then
m_users = new _Recentplayers();
m_ud = new _UserDetails();
m_ud.m_my_name = "";
m_ud.m_user_name = "";
m_users.m_recent_players.Add(m_ud);
string json = JsonUtility.ToJson(m_users);
Debug.Log(json);
