[RESOLVED] Sorting a Generic List

[bixel]

1st > Not using Forms!

so I have a class called Label that draws text on a screen - and no this is not Windows Forms!

I have a Party and that Party has an inventory, like items, weapons and stuff. I have a GUI screen where the inventory is displayed like so

Weapons         Equipped / Count
Bow                          1/2
Dagger                      1/1
Mace                        0/3
Sword                       2/4

so on the far left is a List<Labels> and on the far right is another List<Labels>
I gave the Label class a property called name, that way Label Bow, Bow.Name = Bow
since the other Label 1/2 needs to be paired with Label Bow, that Label.Name also = Bow

Here is the problem, depending on how the Labels are added to the List, they may be displayed improperly, especially on the Labels that are just a bunch of numbers like 2/4, so I need to Sort them alphabetically by their Label.Name inside the List<Label>
and... I don't know how to do that

I tried to use

Sort(Comparison<T> comparison);

but I don't know how that works

[foamy]

What I usually do is create a Comparer like so:

class LabelComparer : IComparer<Label>
{
    private string field;

    public LabelComparer(string field)
    {
        this.field = field;
    }

    public int Compare(Label a, Label b)
    {
        int result = 0;
        switch (field)
        {
            case "Name":
                    result = a.Name.CompareTo(b.Name);
                break;
        }
    }
}

And then do a Sort like this

labels.Sort(new LabelComparer("Name"));

[bixel]

hrmm... getting a

does not implement interface member & not all code paths return a value

labels.Sort(new LabelComparer("Name"));

so its saying, Sort a LabelComparer with the field of "Name"

I was tying to use this >>> http://blog.codewrench.net/2009/04/1...rary-property/

but he has too many compile errors in the code

Thanks for the effort tho! - I will continue tweaking it

[bixel]

ok picked up on a couple of examples but so far no success

1st > in Label

        public static Comparison<Label> NameComparison = delegate(Label p1, Label p2)
        {
            return p1.Name.CompareTo(p2.Name);
        };

        public int CompareTo(Label other)
        {
            return Name.CompareTo(other.Name);
        }

then using it

labels.Sort(Label.NameComparison);

does nothing..

got this idea from > http://dotnetslackers.com/Community/...0_T_3E00_.aspx

[bixel]

Ok!!!! I solved it - its a hack really, the List<Labels> is getting populated from a Dictionary, and since a Dictionary cannot be sorted unless its recreated I simply sorted it BEFORE I created the list

        private void RefreshInvWeaponListLabels()
        {
            List<string> weaponNames = new List<string>();
            foreach (KeyValuePair<string, Fruple<WeaponType, int, int, string>> weapon in GameRef.AdventureParty.InvWeapons)
            {
                string invWeapon = weapon.Key;
                weaponNames.Add(invWeapon);
            }
            weaponNames.Sort();

            int i = 0;
            foreach (string name in weaponNames)
            {
                int weaponCount = GameRef.AdventureParty.InvWeapons[name].Third;
                int weaponEquipCount = GameRef.AdventureParty.InvWeapons[name].Second;
                string weaponLoadOut = Convert.ToString(weaponEquipCount) + "/" + Convert.ToString(weaponCount);
                invWeaponCount[i].Text = weaponLoadOut;
                i++;
            } 
        }

[memeloo]

the List<Labels> is getting populated from a Dictionary, and since a Dictionary cannot be sorted unless its recreated I simply sorted it BEFORE I created the list

then maybe you should try the SortedDictionary<TKey, TValue> Class