我在Entity Framework 6中有此LINQ查询:包含日期时间,我只想获取时间值
我试图使用TimeOfDay或Value.ToShortTimeString来获取ChickinTime和CheckOutTime的值,但它捕获了
List<GetAttendanceViewModel> List = (from R in database.Employee
where R.EmployeeID == empID
join EmpAtt in database.EmployeeAttendance on R.EmployeeFingerPrint equals EmpAtt.ACNo
into g
from EmpAtt in g.DefaultIfEmpty()
where EmpAtt.Time.Value.Month == month && EmpAtt.Time.Value.Year == year
select new GetAttendanceViewModel
{
EmployeeID = empID,
EmployeeName = R.EmployeeName,
ChickinTime = DateTime.TryParseExact(EmpAtt.Time.Value.ToShortTimeString()), // EmpAtt.Time.Value.TimeOfDay,
CheckOutTime = EmpAtt.Time.Value.ToShortTimeString(),
AttendanceDate = EmpAtt.Time.Value.Date,
}).ToList();
使用TimeOfDay的异常: LINQ不支持指定的类型成员'TimeOfDay', 使用TimeOfDay Value.ToShortTimeString的异常: 无法将类型'string'隐式转换为'System.DateTime吗?'