C#•2y ago

✅ Give object default values (destroy?)

Hi I have a program which after sign in assignes object user some values. While sign out i need to delete/destroy or set as default those vaules.

public class User
{
    public int UserId { get; set; }
    public string Username { get; set; }
    public List<Character> Characters { get; set; }

    public User(string username, int userid)
    {
        Username = username;
        UserId = userid;
        Characters = new List<Character>();
    }

    ~User()
    {
        Username = "";
        UserId = default;
        Characters = new List<Character>();;
    }
}

public class User
{
    public int UserId { get; set; }
    public string Username { get; set; }
    public List<Character> Characters { get; set; }

    public User(string username, int userid)
    {
        Username = username;
        UserId = userid;
        Characters = new List<Character>();
    }

    ~User()
    {
        Username = "";
        UserId = default;
        Characters = new List<Character>();;
    }
}

I've heard about deconstructor but i dont know how to use them to be honest. Please help me

10 Replies

Anton•2y ago

forget about the deconstructor either set the whole user to null, which would make more sense, or make a method that resets them you have to do that manually if it were a struct tho, you could've done this = default

rallezOP•2y ago

okay but earlier in my code im creating new User user it won't give me an error?

Anton•2y ago

idk I don't have your code

rallezOP•2y ago

a ihave a login function that creates user object now i want to create a function that log out no user can sign in, log out and the again sign in for example

phaseshift•2y ago

that is business logic, nothing to do with destroying or destructing a user instance

Thinker•2y ago

What this would do is when the instance itself is garbage collected, the destructor is run, which would make it completely useless.

rallezOP•2y ago

so can I do that and it will be completly fine?

User user = new User(providedUsername, Data.TempUserId);
// HERE SOME CODE
User user = new User(providedUsername, Data.TempUserId);

User user = new User(providedUsername, Data.TempUserId);
// HERE SOME CODE
User user = new User(providedUsername, Data.TempUserId);

and will it overwrite it right?

phaseshift•2y ago

well, no. 'user' is the same variable name. But apart from that, you have a valid duplicate its not overwriting anything

User user = new User(providedUsername, Data.TempUserId);
// HERE SOME CODE
user = new User(providedUsername, Data.TempUserId); // re-assign the 'user' variable.

User user = new User(providedUsername, Data.TempUserId);
// HERE SOME CODE
user = new User(providedUsername, Data.TempUserId); // re-assign the 'user' variable.

The first User instance will get GC'd at some point

Thinker•2y ago

"Garbage collected" or "GC'd" is when an object has no references throughout the entire program. It's inaccessible, gone, discarded. At that point, the destructor might be run, before the memory is freed entirely, but you can't really do anything of value at that point. anyway, as already stated, destructors are not the right tool here.

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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✅ Give object default values (destroy?)