这是我的 POST
的扩展问题
class EmployeeSchedule
{
public int Id { get; set; }
public string Name { get; set; }
public DateTime WorkDate { get; set; }
public bool isOff { get; set; }
}
现在在这种情况下,我想从列表中找到 Id
其 WorkDate
未在 4/12/2016
中找到我的标准。
List<Staff> workers = new List<Staff>()
{
new Staff { Id = 1, Name = "Emp 1", WorkDate = Convert.ToDateTime("4/11/2016"), IsOff = false},
new Staff { Id = 1, Name = "Emp 1", WorkDate = Convert.ToDateTime("4/12/2016"), IsOff = false},
new Staff { Id = 1, Name = "Emp 1", WorkDate = Convert.ToDateTime("4/13/2016"), IsOff = false},
new Staff { Id = 1, Name = "Emp 1", WorkDate = Convert.ToDateTime("4/14/2016"), IsOff = false},
new Staff { Id = 1, Name = "Emp 1", WorkDate = Convert.ToDateTime("4/15/2016"), IsOff = false},
new Staff { Id = 1, Name = "Emp 1", WorkDate = Convert.ToDateTime("4/16/2016"), IsOff = false},
new Staff { Id = 1, Name = "Emp 1", WorkDate = Convert.ToDateTime("4/17/2016"), IsOff = false},
new Staff { Id = 2, Name = "Emp 2", WorkDate = Convert.ToDateTime("4/11/2016"), IsOff = false},
// new Staff { Id = 2, Name = "Emp 2", WorkDate = Convert.ToDateTime("4/12/2016"), IsOff = false},
new Staff { Id = 2, Name = "Emp 2", WorkDate = Convert.ToDateTime("4/13/2016"), IsOff = false},
new Staff { Id = 2, Name = "Emp 2", WorkDate = Convert.ToDateTime("4/14/2016"), IsOff = false},
new Staff { Id = 2, Name = "Emp 2", WorkDate = Convert.ToDateTime("4/15/2016"), IsOff = false},
new Staff { Id = 2, Name = "Emp 2", WorkDate = Convert.ToDateTime("4/16/2016"), IsOff = false},
new Staff { Id = 2, Name = "Emp 2", WorkDate = Convert.ToDateTime("4/17/2016"), IsOff = false},
};
到目前为止我已经尝试过这段代码:
var notInDate = workers.Where(x => !workers.Any(y => Convert.ToDateTime("4/12/2016") != x.WorkDate));
foreach (var item in notInDate)
{
Console.WriteLine(item.Id + " " + item.WorkDate.Date);
}
输出为:ID :1 WorkDate: 4/12/2016 12:00:00 AM
这个输出是这样的:
var notInDate = workers.Where(x => workers.Any(y => Convert.ToDateTime("4/12/2016") != x.WorkDate));
ID :1 WorkDate: 4/11/2016 12:00:00 AM
ID :1 WorkDate: 4/13/2016 12:00:00 AM
ID :1 WorkDate: 4/14/2016 12:00:00 AM
ID :1 WorkDate: 4/15/2016 12:00:00 AM
ID :1 WorkDate: 4/16/2016 12:00:00 AM
ID :1 WorkDate: 4/17/2016 12:00:00 AM
ID :2 WorkDate: 4/11/2016 12:00:00 AM
ID :2 WorkDate: 4/13/2016 12:00:00 AM
ID :2 WorkDate: 4/14/2016 12:00:00 AM
ID :2 WorkDate: 4/15/2016 12:00:00 AM
ID :2 WorkDate: 4/16/2016 12:00:00 AM
ID :2 WorkDate: 4/17/2016 12:00:00 AM
第二个例子只是删除了 WorkDate is 4/12/2016
我想得到 whose Id = 2
因为 Id
没有 4/12/2016 的
WorkDate
最佳答案
如果您想要当天没有工作的人的所有条目,您需要按 id 分组(以获取每个人的组)并过滤不包含日期的个别组。类似的东西;
var notInDate =
// Create a group per employee
workers.GroupBy (x => x.Id)
// Keep only groups that didn't work
.Where (x => !x.Any (y => y.WorkDate == Convert.ToDateTime ("4/12/2016")))
// Get only the key for each group
.Select (x => x.Key);
关于c# - LINQ:获取不在记录中的项目 - C#,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36588285/