使用for循环迭代Linq组结果集

Question

我有一个名为myGroup的Linq组结果集.myGroup是一种类型

IGrouping <String,myObject>

我试图通过for循环迭代这个.

目前,我可以这样做:

foreach (var item in group)
{
    Console.WriteLine(item.Id);
}

如何使用for循环实现相同的功能？

我尝试做类似下面的事情:

   for (int i = 0; i < myGroup.Count(); i++)
         {
          // Now How can I access the current myGroup Item?
          //I DO NOT have ElementAt() property in myGroup.
          myGroup.ElementAt(i).Id // THIS IS NOT POSSIBLE
         }

但我不知道如何在for循环中访问myGroup当前元素

Answer 1

这是使用ElementAt()的工作示例:

public class Thing
{
    public string Category { get; set; }
    public string Item { get; set; }
}

class Program
{
    static void Main(string[] args)
    {
        var foos = new List<Thing>
        {
            new Thing { Category = "Fruit", Item = "Apple" },
            new Thing { Category = "Fruit", Item = "Orange" },
            new Thing { Category = "Fruit", Item = "Banana" },
            new Thing { Category = "Vegetable", Item = "Potato" },
            new Thing { Category = "Vegetable", Item = "Carrot" }
        };

        var group = foos.GroupBy(f => f.Category).First();

        for (int i = 0; i < group.Count(); i++)
        {
            Console.WriteLine(group.ElementAt(i).Item); //works great
        }
    }
}