How to sort in C# a tuple that contains several elements?

Question

Hi,

I would like to sort in ascending order a tuple starting from its 2nd element:

List<Tuple<string, string, string>> tupleSpecial = new List<Tuple<string, string, string>>

The 2nd element of this tuple actually represents a number, it is stored here as a string, but the sorting would be done according to this 2nd element.

I have already thought of reconstructing a tuple by converting the 2nd element to an int, which would give for example:

List<Tuple<string, int, string>> tupleSpecialInt = new List<Tuple<string, int, string>>

The problem is that as this tuple has 3 elements, I don't see how to sort in ascending order this tuple according to its 2nd element.

How to sort in C# this tuple in ascending order based on its 2nd element (int)?

Thank you for your help.

Answer 1

You could use a custom comparer class

        Tuple<string, int, string>[] lst =
         {
            new Tuple<string, int, string>("z", 1, "z"),
            new Tuple<string, int, string>("a", 2, "a"),
            new Tuple<string, int, string>("d", -1, "d")
        };
        Array.Sort(lst, new MyTupleComparer());
        foreach (var item in lst)
        {
            Console.WriteLine(item.Item2);
        }



public class MyTupleComparer : Comparer<Tuple<string, int, string>>
{
    public override int Compare(Tuple<string, int, string> x, Tuple<string, int, string> y)
    {
        return x.Item2.CompareTo(y.Item2);
    }
}

Answer 2

almost correct, to sort by second & third item:

Tuple<string, int, string>[] lst =
{
    new Tuple<string, int, string>("z", 1, "z"),
    new Tuple<string, int, string>("a", 2, "a"),
    new Tuple<string, int, string>("a", 2, "b"),
    new Tuple<string, int, string>("d", -1, "d")
};
Array.Sort(lst, (x , y) =>
{
    var c1 = x.Item2.CompareTo(y.Item2);
    return c1 == 0 ? x.Item3.CompareTo(y.Item3) : c1;
});
foreach (var item in lst)
{
    Console.WriteLine($"{item.Item2},{item.Item3}");
}