如何分割在 foreach 循环中迭代的元素 [英] How do I segment the elements iterated over in a foreach loop

问题描述

我需要遍历整个用户列表，但需要一次抓取 20 个.

I need to loop through an entire list of users, but need to grab 20 at a time.

foreach (var student in Class.Students.Take(20))
{
   Console.WriteLine("You belong to Group " + groupNumber);
   groupNumber++;
}

这样，前 20 个将属于第 1 组，第二个 20 将属于第 2 组，依此类推.

This way the first 20 will belong to Group 1, the second 20 to Group 2, and so on.

为此采取正确的语法吗?我相信 Take 需要 20 次才能完成.谢谢！

Is Take the correct syntax for this? I believe Take will take 20 then be done. Thanks!

推荐答案

你可以这样做:

int i = 0;
foreach (var grouping in Class.Students.GroupBy(s => ++i / 20))
    Console.WriteLine("You belong to Group " + grouping.Key.ToString());

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