CODEWITHSUNDEEP
c#
jamheadart
jamheadart

Reputation: 5333

c# How can I get the nameof the item list referred to?

is it possible to get the nameof a variable when its referred to as a list index? The first line in my RUN() method compiles and produces the "x", the second line will not compile, saying the expression does not have a name. But it does have a name - how can I direct it during runtime to get that name, or is this impossible via lists?

    class list_experiment
    {
        public string x = "xx";
        public List<string> list;

        public list_experiment()
        {
            list = new List<string>() { x };
        }
    }


    static public void RUN()
    {
        list_experiment a = new list_experiment();

        Console.WriteLine(nameof(a.x));
        Console.WriteLine(nameof(a.list[0])); // Doesn't compile
        Console.ReadKey();
    }

Upvotes: 2

Views: 1956

Answers (1)

Daniel A. White
Daniel A. White

Reputation: 190986

The value in the list is a reference to the string value ** - there is nothing tying it back to x which is a reference to the same string.

nameof is a compile time facility. Adding to a List<T> is a runtime facility which the compiler can't reasonably track those things for you.

Upvotes: 4

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