How to save a dictionary with prefabs in a text document?

Question

C++ / C#

I have a dictionary like DictionaryPrefabs = new Dictionary(); , ClassPrefab is a prefab with a class, it has a variety of variables (int, string, bool, Dictionary, Array....), I need to save the state of the DictionaryPrefabs dictionary with all prefabs and data in them, how to do this?

Or maybe you can just save the scene itself?
I have a game scene and a "save and exit" function, the player can either load a save or start the scene from scratch, i.e. there are no multiple saves...

Answer 1

You can save manually via BinaryWriter, BinaryReader or Json. Prefabs themselves cannot be saved, but their data can.
Here's a simple implementation of how you can save the data. (I did not check the code for performance, but nevertheless)

public interface IData
{
  void Read(BinaryReader reader);
  void Write(BinaryWriter writer);
}

public class CustomClass : IData
{
  private int _customVar;

  public void Write(BinaryWriter writer)
  {
    writer.Write(_customVar);
  }

  public void Read(BinaryReader reader)
  {
    _customVar = reader.ReadInt32();
  }
}

public class PrefabClass: MonoBehaviour, IData
{
  private int _intValue;
  private float _floatValue;
  private string _stringValue;

  private CustomClass _customClass;

  public void Write(BinaryWriter writer)
  {
    writer.Write(_intValue);
    writer.Write(_floatValue);
    writer.Write(_stringValue);
    ((IData)_customClass).Write(writer);
  }

  public void Read(BinaryReader reader)
  {
    // Читать нужно в том же порядке что и пишется
    _intValue = reader.ReadInt32();
    _floatValue = reader.ReadSingle();
    _stringValue = reader.ReadString();

    // Свои данные
    // ...
    ((IData)_customClass).Read(reader);
  }
}

public class DictionaryClass
{
  private Dictionary<string, IData> _dict = new Dictionary<string, IData>();

  public void Save()
  {
    using (BinaryWriter writer = new BinaryWriter(File.Open("Path", FileMode.Create)))
        {
            foreach(var item in _dict)
            {
            	item.Write(writer);
            }
        }
  }

  public void Load()
  {
    if (File.Exists("Path"))
        {
            using (BinaryReader reader = new BinaryReader(File.Open("Path", FileMode.Open)))
            {
                foreach(var item in _dict)
                {
                	item.Read(reader);
                }
            }
        }
  }
}