How can I loop through a List<T> and grab each item?

问题

How can I loop through a List and grab each item?

I want the output to look like this:

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

Here is my code:

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; }
}

回答1:

foreach:

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

MSDN Link

Alternatively, because it is a List<T>.. which implements an indexer method [], you can use a normal for loop as well.. although its less readble (IMO):

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

回答2:

Just for completeness, there is also the LINQ/Lambda way:

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

回答3:

Just like any other collection. With the addition of the List<T>.ForEach method.

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));

回答4:

This is how I would write using more functional way. Here is the code:

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}");
});

回答5:

Try this

List<int> mylist = new List<int>();   
mylist.Add(10);  
mylist.Add(100);   
mylist.Add(-1);

// We can loop over list items with foreach.

foreach (int value in mylist )       
{       
 Console.WriteLine(value);       
}

Console.WriteLine("::DONE WITH PART 1::");

// This will cause an enter code hereexception.

foreach (int value in mylist )     
{         
 list.Add(0);      
}

来源：https://stackoverflow.com/questions/18863187/how-can-i-loop-through-a-listt-and-grab-each-item