IComparable

I've implemented this before a very long time ago and since I forgot, i read up about it again to see what the method should look like for CompareTo()

I have implemented this correctly but when I sort the ArrayList giving it null as a parameter, it seems not to sort it but do it in decending order.

So:
I have an arraylist of specific objects (note, this is not a general list....this is using .NET 1.1)

I have implemented the IComparable interface and its method for the object type in question.

I did an: collection.Sort(null); and it didnt seem to sort it (but it does call the compareTo() method):

Code:

---


#region IComparable Members

                public int CompareTo(object obj)
                {
                        // TODO:  Add VacancyInfoHelper.CompareTo implementation
                        if ((obj is VacancyInfoHelper) == false)
                        {
                                return -1;
                        }

                        VacancyInfoHelper helper = (VacancyInfoHelper)obj;
                        return this.rank.CompareTo(helper.rank);
                }

#endregion

---

edit: forgot to mention it is an ASP.NET application and since the private field "rank" is set to 0 by default, would that make much difference? I believe it is so how do I do sorting on an ASP.NET based application?

solved. Had to implement it in a different way.....

if (helper.score < this.score)
{
return -1;
}
else if (helper.score == this.score)
{
return 0;
}
else
{
return 1;
}

It's much easier than that even:

C# Code:

return helper.score.CompareTo(this.score);

If 'score' is type 'int' you could also use:

C# Code:

return helper.score - this.score;

I tried that but it didn't work - the way I posted after seemed to work correctly and it is a type int :)