c# - 如何检查元组是否有任何项目？

Question

我有以下元组:

Tuple <string, string> UHRSCredentals;

UHRSCredentals = new Tuple<string, string>(UserNameLine.Split('\t')[1], PasswordLine.Split('\t')[1]);

如何检查 UHRSCredentals 是否还有除此之外的任何项目？

if (UHRSCredentals.Item1 != "" && UHRSCredentals.Item2 !="")

Answer 1

您可以编写一个简单的扩展方法:

public static class TupleExtensions
{
    public static bool HasValue(this Tuple<string, string> tuple)
    {
        return !string.IsNullOrEmpty(tuple?.Item1) && !string.IsNullOrEmpty(tuple?.Item2);
    }
}

var UHRSCredentals = Tuple.Create(UserNameLine.Split('\t')[1], PasswordLine.Split('\t')[1]);
bool hasValue = UHRSCredentals.HasValue(); // True!

但也许您应该考虑一个小类来更清楚地表示和封装您的意图:

class UsernamePasswordPair
{
    public string Username { get; private set; }
    public string Password { get; private set; }
    public bool HasValue { get; private set; }

    public static UsernamePasswordPair Create(string usernameLine, string passwordLine)
    {
        UsernamePasswordPair pair = new UsernamePasswordPair();
        pair.Username = usernameLine?.Split('\t')[1];
        pair.Password = passwordLine?.Split('\t')[1];
        pair.HasValue = !string.IsNullOrEmpty(pair.Username) 
                && !string.IsNullOrEmpty(pair.Password);
        return pair;
    }
}

UsernamePasswordPair p1 = UsernamePasswordPair.Create(UserNameLine, PasswordLine);
bool hasValue = p1.HasValue; // True!