c#linq Groupby查询忽略布尔上的Where

我有一个IEnumerable，我想先用它过滤。在bool上的Where，然后像这样的GroupBy

int someInt = orderEditorViewModel.EditOrderFitters.Where(f => f.Delete == false).GroupBy(f => f.OrderFitter.Person).Count();

EditOrderFitters是一个

    public class EditOrderFitter
    {
        [Display(Name = "Delete?")]
        public bool Delete { get; set; }
        public bool Added { get; set; }  // this is hidden
        public OrderFitter OrderFitter { get; set; }
    }

但即使Delete为true，查询也包括EditOrderFitter

我先用这个冗长的解决方法过滤掉

List<EditOrderFitter> notDeletedOrderFitters = new List<EditOrderFitter>();
      foreach (EditOrderFitter e in orderEditorViewModel.EditOrderFitters)
      {
          if (!e.Delete)
          {
              notDeletedOrderFitters.Add(e);
          }
      }

这是可行的，但这有什么问题吗

.Where(f => f.Delete == false)

在第一个linq查询中。我也试过：

int someInt = orderEditorViewModel.EditOrderFitters.Where(f => !f.Delete).GroupBy(f => f.OrderFitter.Person).Count();

但同样，该列表没有被过滤

向大家道歉，我正在查看此if语句的LHS，以测试列表中的重复条目，而我本应同时查看这两个条目

if (orderEditorViewModel.EditOrderFitters.Where(f => f.Delete == false).GroupBy(f => f.OrderFitter.Person).Count() < orderEditorViewModel.EditOrderFitters.Where(f => f.Delete == false).Count())

if（orderEditorViewModel.editorfitters.Where（f=>f.Delete==false）.GroupBy（f=>f.OrderFitter.Person）.Count（）f.Delete==false）.Count（）

感谢您的回复和评论！

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我忘了在两边都删除了

我刚刚复制了你的情况，它给了我正确的结果，你可以检查一下生活

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它是EF还是内存中的集合？循环应该与

orderEditorViewModel.EditOrderFitters.Where（f=>！f.Delete）.ToList（）完全相同。是的，我错了，我已经编辑了这个问题。谢谢你，我错了，我已经编辑了这个问题。非常感谢。这帮助我睁开眼睛，看到了错误。
if (orderEditorViewModel.EditOrderFitters.Where(f => f.Delete == false).GroupBy(f => f.OrderFitter.Person).Count() < orderEditorViewModel.EditOrderFitters.Where(f => f.Delete == false).Count())

using System;
using System.Linq;
// https://stackoverflow.com/questions/59702370/c-sharp-linq-groupby-query-ignoring-where-on-bool

public class Program
{
    public static void Main()
    {
        var orderEditorViewModel = new 
        {
            ParentName = "xyz",
            EditOrderFitters = new [] 
            {
                new EditOrderFitter { Delete = true, OrderFitter = new OrderFitter { Id = 1, Person = "1" } },

                new EditOrderFitter { Delete = false, OrderFitter = new OrderFitter { Id = 1, Person = "2" } },

                new EditOrderFitter { Delete = false, OrderFitter = new OrderFitter { Id = 1, Person = "2" } },

                new EditOrderFitter { Delete = false, OrderFitter = new OrderFitter { Id = 1, Person = "3" } }
            }
        };

        var result = orderEditorViewModel.EditOrderFitters.Where(f => !f.Delete).GroupBy(f => f.OrderFitter.Person);
        foreach(var item in result)
            Console.WriteLine("" + " Count: " + item.Count());

    }

    public class EditOrderFitter
    {

        public bool Delete { get; set; }
        public bool Added { get; set; }
        public OrderFitter OrderFitter { get; set; }
    }

    public class OrderFitter 
    {
        public int Id { get; set; }
        public string Person { get; set; }
    }

}