c# - 如何循环遍历列表并抓住每件物品？

Question

如何遍历列表并获取每个项目？

我希望输出看起来像这样：

Console.WriteLine("amount is {0}, and type is {1}", myMoney.amount, myMoney.type);

这是我的代码：

static void Main(string[] args)
{
    List<Money> myMoney = new List<Money> 
    {
        new Money{amount = 10, type = "US"},
        new Money{amount = 20, type = "US"}
    };
}

class Money
{
    public int amount { get; set; }
    public string type { get; set; }
}

Answer 1

foreach：

foreach (var money in myMoney) {
    Console.WriteLine("Amount is {0} and type is {1}", money.amount, money.type);
}

MSDN 链接

或者，因为它是一个List<T>实现索引器方法的 .. ，所以[]您也可以使用普通for循环 .. 虽然它的可读性较差（IMO）：

for (var i = 0; i < myMoney.Count; i++) {
    Console.WriteLine("Amount is {0} and type is {1}", myMoney[i].amount, myMoney[i].type);
}

Answer 2

为了完整起见，还有 LINQ/Lambda 方式：

myMoney.ForEach((theMoney) => Console.WriteLine("amount is {0}, and type is {1}", theMoney.amount, theMoney.type));

Answer 3

就像任何其他收藏一样。加上List<T>.ForEach方法。

foreach (var item in myMoney)
    Console.WriteLine("amount is {0}, and type is {1}", item.amount, item.type);

for (int i = 0; i < myMoney.Count; i++)
    Console.WriteLine("amount is {0}, and type is {1}", myMoney[i].amount, myMoney[i].type);

myMoney.ForEach(item => Console.WriteLine("amount is {0}, and type is {1}", item.amount, item.type));

Answer 4

这就是我使用 more 编写的方式functional way。这是代码：

new List<Money>()
{
     new Money() { Amount = 10, Type = "US"},
     new Money() { Amount = 20, Type = "US"}
}
.ForEach(money =>
{
    Console.WriteLine($"amount is {money.Amount}, and type is {money.Type}");
});

Answer 5

低级iterator操作代码：

List<Money> myMoney = new List<Money>
{
    new Money{amount = 10, type = "US"},
    new Money{amount = 20, type = "US"}
};
using (var enumerator = myMoney.GetEnumerator())
{
    while (enumerator.MoveNext())
    {
        var element = enumerator.Current;
        Console.WriteLine(element.amount);
    }
}