save List<Custom class> and load it

Unity Engine
1

Hi
I want to save a list as follows, but it will not load after save.

public List<c> ct = new List<c>();

[System.Serializable]
public class c
{
    public string a;
    public int b;
}

--------

    public void ex()
    {
        BinaryFormatter bi = new BinaryFormatter();
        FileStream file = File.Create("ct.zip");
        bi.Serialize(file, ct);
        file.Close();
    }

    public void in()
    {
        BinaryFormatter bi = new BinaryFormatter();
        FileStream file = File.Open("ct.zip", FileMode.Open);
        ct = (List<c>)bi.Deserialize(file);
        file.Close();
        print ( ct[0].a );
    }
2

  1. BinaryFormatter should be avoided for security reasons. And that’s not just security for you the dev, but for security for the user. It can be used to perform attacks via your software… see the warning in the docs:
    BinaryFormatter Class (System.Runtime.Serialization.Formatters.Binary) | Microsoft Learn

  2. What is happening versus what you expect to happen? Are there compiler errors? Are there runtime exceptions? What are those? We need more information.

This is a free forum where people donate their time to assist. We generally won’t put in a significant amount of work assisting if you can’t put in the effort explaining details about the problem.

1 Like
3

The code I wrote does not load anything and does not give any errors
Note : I want to save and retrieve the list of custom class
important : I want to use the ability to remove and insert an element in the list , not use from struct or class to form of sequential add and delete , i want save list of class and load it in one list again and use it to form of list

4

Solved !
thanks