Question

我是使用Linq的新手，想知道如何打印出Mode值的多个值。目前，我只能从“模式”中获得1个值，但我希望它显示多个值。

string[] list = TextBox1.Text.Split(new string[] { "," }, 
    StringSplitOptions.RemoveEmptyEntries);
int[] numbers = new int[list.Length];
for (int i = 0; i < numbers.Length; i++)
{
    numbers[i] = Convert.ToInt32(list[i].Trim());
}
int mode = numbers.GroupBy(v => v)
                  .OrderByDescending(g => g.Count())
                  .First()
                  .Key;

Answer 1

您需要在收藏之前保存好收藏的物品。

string[] list = TextBox1.Text.Split(new string[] { "," }, 
  StringSplitOptions.RemoveEmptyEntries);
IEnumerable<IGrouping<int, int>> modes = list.GroupBy(v => v);
IEnumerable<IGrouping<int, IGrouping<int, int>>> groupedModes = modes.GroupBy(v => v.Count());
var sortedGroupedModes = groupedModes.OrderByDescending(g => g.Key).ToList();

TextBox2.Text = string.Join(" ", sortedGroupedModes[0].Select(x => x.Key)));

Answer 2

您可以获取所有组，并仅提取计数最高的组（包括关系）：

var counts = numbers.GroupBy(v => v)
                    .Select(g => g.Key, Count = g.Count())
                    .OrderByDescending(g => g.Count);

var modes = numbers.Where(g => g.Count == counts.First().Count)
                   .Select(g => g.Key);

使用LINQ C＃计算模式

2 个答案: