How to convert a list into Json?Code not working

I was trying to convert a list into json format.The jsonstring I am getting is always empty.Code below

Code (CSharp):

1.  
2. [System.Serializable]
3. public class ListContainer
4. {
5.  
6.     public List<PlayerHandler> SaveValues;
7.  
8.     public ListContainer(List<PlayerHandler> _saveVal)
9.     {
10.         SaveValues = _saveVal;
11.     }
12.  
13. }
14.  
15. public class Testing : MonoBehaviour
16. {
17. List<PlayerHandler> getAlldata;
18.  
19. var container = new ListContainer(getAlldata);
20. string jsonstring = JsonUtility.ToJson(container);
21. //the jsonstring  is always empty
22.  
23. }

 

This question asked million times before. Unity serializer do not support arrays as root object as stated in the manual.

Code (CSharp):

1. [Serializable]
2. class Container<T> {
3. public T[] array;
4. }

 

From the below code I once got the json string.So what is the difference I am passing the same list in the below code.

Code (CSharp):

1.  
2. public struct ListContainer

3. {

4.   public List<DataHandlers> SaveValues;


5.    /// <summary>

6.   /// Constructor

7.   /// </summary>

8.   /// <param name="_dataList">Data list value</param>

9.   public ListContainer(List<DataHandlers> _dataList)

10.     {
  
11.     SaveValues = _dataList;

12.     }

13. }
14.  
15.  
16.  SaveValues.Clear();
          
17.  SaveValues = UnityARHitTestExample.HittestInstance.Modelinfo;


18.  ListContainer container = new ListContainer(SaveValues);

            
19.  string jsonstring = JsonUtility.ToJson(container);
            
20.  Debug.Log("Save JSON String = " + jsonstring);


Where Modelinfo

Code (CSharp):

1. public List<DataHandlers> Modelinfo = new List<DataHandlers>();
2.  
3.  
4. [Serializable]
5. public class DataHandlers
6. {
7.     public int modelid;
8.     public Vector3 localposinmap;
9.     public Quaternion localrotinmap;
10.     public Vector3 sizeofobj;
11.  
12.  
13.     public DataHandlers(int idmodel,Vector3 localpos, Quaternion localrot, Vector3 objsize)
14.     {
15.         this.modelid = idmodel;
16.         this.localposinmap = localpos;
17.         this.localrotinmap = localrot;
18.         this.sizeofobj = objsize;
19.  
20.  
21.     }
22.  
23.  
24. }

 

Your first example getAllData is null, I'm not sure what jsonUtility does with that to begin with. Beyond that, I usually use json.net for my json stuff.

 

In both the cases I am using a list.In one I got a json string and in another I dont get it.