i need help... i try to load my game that i saved but i get a error.

[justinsommermeyer41]

Hello, i need help.

I try to read a json file that i create when i save my Game, but i get a error everytime, i looked over it myself and even looked online but i cant find the problem. i would be very gatefull when someone could help me.

Debug output:

ArgumentException: JSON parse error: Invalid value.
UnityEngine.JsonUtility.FromJsonOverwrite (System.String json, System.Object objectToOverwrite) (at :0)

Method (Error in 46)

public void Load()
{
if(File.Exists(string.Concat(Application.persistentDataPath, savePath)))

{
BinaryFormatter bf = new BinaryFormatter();
FileStream file = File.Open(string.Concat(Application.persistentDataPath, savePath), FileMode.Open);
Debug.Log(“2”);
46 JsonUtility.FromJsonOverwrite(bf.Deserialize(file).ToString(), this);
Debug.Log(“3”);
file.Close();
}
}

[Kurt-Dekker]

What is going on there with the binary formatter AND the JSON?!!

Load/Save steps:

Save system questions

Saving/Loading is never simple. There’s tons of tutorials out there on Youtube to give you an idea of the process. Basically step 1 is identify what needs to be saved. Might just be a single digit, as in “what level am I on?” Might be a lot more: GameObjects, inventories, internal states of running scripts, positions, rotations, etc. Keep in mind the more you save the more debugging and painstaking engineering you’re going to need to do. And it gets really hairy. Step 2 - design a data stru…

An excellent discussion of loading/saving in Unity3D by Xarbrough:

Save system

If you have no experience, it might be best to first use a prebuilt solution like something from the Asset Store, just to learn those concepts and see the limitations in action. Then you can always write your own. At the same time, you can follow a few tutorials. Just a random one that I remember doing: Persisting Objects But, don’t just take any single thing for an answer. Look at multiple approaches, make your own experiments and then apply what you’ve learned to your own project. Maybe at t…

Loading/Saving ScriptableObjects by a proxy identifier such as name:

Use the JSON serilization for ScriptableObject with asset fields in Editor and Build

We trivially work around this as follows: we recognize that ScriptableObjects cannot be serialized. we put ALL ScriptableObjects of a given type in a single directory to enforce name uniqueness we make a Repository object to retrieve these ScriptableObjects by name we modify our serializable structures so they: ----> don’t serialize the SO itself ----> they serialize the name of the SO ----> they load the SO as a reference and look it up You cannot use Unity’s “lite” JSON imple…

When loading, you can never re-create a MonoBehaviour or ScriptableObject instance directly from JSON. The reason is they are hybrid C# and native engine objects, and when the JSON package calls new to make one, it cannot make the native engine portion of the object.

Instead you must first create the MonoBehaviour using AddComponent() on a GameObject instance, or use ScriptableObject.CreateInstance() to make your SO, then use the appropriate JSON “populate object” call to fill in its public fields.

If you want to use PlayerPrefs to save your game, it’s always better to use a JSON-based wrapper such as this one I forked from a fellow named Brett M Johnson on github:

https://gist.github.com/kurtdekker/7db0500da01c3eb2a7ac8040198ce7f6

Do not use the binary formatter/serializer: it is insecure, it cannot be made secure, and it makes debugging very difficult, plus it actually will NOT prevent people from modifying your save data on their computers.
Deserialization risks in use of BinaryFormatter and related types - .NET | Microsoft Learn

[justinsommermeyer41]

oh okay, i look over it and try it thank you. saw it on YT like this and thought it would work like in the video lmao

[justinsommermeyer41]

public void Save()
{
string saveData = JsonUtility.ToJson(this, true);
BinaryFormatter bf = new BinaryFormatter();
FileStream file = File.Create(string.Concat(Application.persistentDataPath, savePath));
bf.Serialize(file, savePath);
file.Close();
}

Thats my Save Method, all fine with it and it workes mhm