将字符串对添加到列表中的更好方法是什么 <T> ？

Question

I need to create List whete T is pair of strings.

I tryed to do that in most obvious way:

public struct rule {
    public string left, right;
}

class Program {
    static void Main(string[] args) {
        List<rule> rules = new List<rule>();
        rules.Add(new rule("asd","asd"));
    }
}

I get that here needed constructor. And now i think - creating class just to put some strings into list sounds wrong.

Maybe here is any more simple way to do that?

Answer 1

Apart from using a separate class (you're doing it wrong anyway), you can use a Tuple<> . While using KeyValuePair is also an option here, logically it will not be correct as it represents a key with a corresponding value, which is not you want as I understand.

List<Tuple<string, string>> rules = new List<Tuple<string, string>>();
rules.Add(Tuple.Create("aaa", "bbb"));

To repair you class approach you can do the following:

public struct rule {
    public string left, right;

    public rule(string left, string right) 
    {
        this.left = left;
        this.right = right;
    }
}

Or use auto-properties:

public class rule
{
    public string left {get;set;}
    publci string right {get;set;}
}

And then in your main method:

rules.Add(new rule {right ="asd", left = "asd"});

Answer 2

我没有发现像上面那样添加类有什么问题，但是您可以使用KeyValuePair

Answer 3

Why not use KeyValuePair ?

class Program {
    static void Main(string[] args) {
        List<KeyValuePair<string, string>> rules = new List<KeyValuePair<string, string>>();
        rules.Add(new KeyValuePair<string, string>("asd","asd"));
    }
}