C#•3y ago

List as a field of an object. [Answered]

public class Character
    {
        public string? Id { get; set; } // Identifier.
        public List<string>? Name { get; set; } // In-game identifier.
    }

public class Character
    {
        public string? Id { get; set; } // Identifier.
        public List<string>? Name { get; set; } // In-game identifier.
    }

    static void Main(string[] args)
{
Character Populus = new Character();
Populus.Name[0] = "test";
}

    static void Main(string[] args)
{
Character Populus = new Character();
Populus.Name[0] = "test";
}

What am I doing wrong? I'm trying to have a Character object with ever increasing amount of Names.

9 Replies

Aaron•3y ago

I'm assuming this throws a null reference exception? you aren't initializing Name to anything

populusOP•3y ago

System.NullReferenceException: 'Object reference not set to an instance of an object.' But does it make sense what I'm trying to do? How would you do it?

Aaron•3y ago

that happens because List<string> Name starts as null unless you add = new List<string>(); (also, you probably want Name.Add("test") instead of Name[0] = "test")

populusOP•3y ago

public Character()
        {
            this.Id = UtilityClass.createUUID();
            this.Name = new List<string>();
        }

public Character()
        {
            this.Id = UtilityClass.createUUID();
            this.Name = new List<string>();
        }

I added it in the constructor.

Aaron•3y ago

that works, although you can just do

    public class Character
    {
        public string Id { get; set; } = UtilityClass.createUUID(); // Identifier.
        public List<string> Name { get; set; } = new List<string>(); // In-game identifier.
    }

    public class Character
    {
        public string Id { get; set; } = UtilityClass.createUUID(); // Identifier.
        public List<string> Name { get; set; } = new List<string>(); // In-game identifier.
    }

populusOP•3y ago

Ah, I understand. Thanks @Windows10CE.

Accord•3y ago

Ask the thread owner or member with permission to close this!

Aaron•3y ago

damn

Accord•3y ago

✅ This post has been marked as answered!

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List as a field of an object. [Answered]