C# 随机分组 | 集合分组 | 集合(列表、数组)分成几组

直接上代码：

/// <summary>
/// 随机分组
/// </summary>
/// <param name="list">列表集合</param>
/// <param name="GroupCount">组数</param>
/// <returns></returns>
public static List<List<string>> RandomizedGroupingArray(List<string> list, int GroupCount = 1)
{
    //打乱
    Random random = new Random();
    list = list.OrderBy(x => random.Next()).ToList();

    //分组
    var groups = list
                .Select((item, index) => new { Item = item, GroupIndex = index % GroupCount })
                .GroupBy(item => item.GroupIndex, (key, group) => group.Select(groupItem => groupItem.Item).ToList())
                .ToList();

    return groups;
}

测试结果：

namespace Test
{
    public class Program
    {
        public static void Main(string[] args)
        {
            List<string> list = new List<string>()
            {
                "1",
                "2",
                "3",
                "4",
                "5",
                "6",
            };

            //分成3组
            var result = RandomizedGroupingArray(list,3);

            int groupIndex = 1;
            foreach (var item in result)
            {
                Console.WriteLine($"第{groupIndex}组");
                foreach (var item2 in item)
                {
                    Console.WriteLine(item2);
                }
                Console.WriteLine();
            }
        }

        /// <summary>
        /// 随机分组
        /// </summary>
        /// <param name="list">列表集合</param>
        /// <param name="GroupCount">组数</param>
        /// <returns></returns>
        public static List<List<string>> RandomizedGroupingArray(List<string> list, int GroupCount = 1)
        {
            //打乱
            Random random = new Random();
            list = list.OrderBy(x => random.Next()).ToList();

            //分组
            var groups = list
                        .Select((item, index) => new { Item = item, GroupIndex = index % GroupCount })
                        .GroupBy(item => item.GroupIndex, (key, group) => group.Select(groupItem => groupItem.Item).ToList())
                        .ToList();

            return groups;
        }
    }
}