我正在使用LINQ查询来检索当前一周的所有记录,但是,我需要排除今天和昨天的所有记录。
这是我到目前为止的内容:
DateTime startThisWeek = DateFunctions.GetFirstDayOfWeek(DateTime.Now).AddDays(1);
DateTime endOfThisWeek = startThisWeek.AddDays(6);
DateTime today = DateTime.Now;
DateTime yesterday = DateTime.Now.AddDays(-1);
var notificationList =
(from n in db.DashboardNotifications
.OrderByDescending(n => n.NotificationDateTime)
where (n.NotificationDateTime >= startThisWeek &&
n.NotificationDateTime <= endOfThisWeek) &&
(n.NotificationDateTime != today &&
n.NotificationDateTime != yesterday)
select n).ToList();
以上查询的问题在于它没有返回正确的记录,它也显示了今天的记录。
最佳答案
假设您的DateFunctions.GetFirstDayOfWeek
正常工作
DateTime startThisWeek = DateFunctions.GetFirstDayOfWeek(DateTime.Now);
DateTime yesterday = DateTime.Today.AddDays(-1);
var notificationList =
(from n in db.DashboardNotifications
where n.NotificationDateTime.Date >= startThisWeek.Date &&
n.NotificationDateTime.Date < yesterday)
orderby n.NotificationDateTime descending
select n).ToList();
评论:如果本周的开始时间不是昨天之前,那么您将没有任何记录。否则,昨天始终会在当前一周结束之前。
如何正确开始一周:
public static class DateTimeExtensions
{
public static DateTime StartOfWeek(this DateTime date,
DayOfWeek startOfWeek = DayOfWeek.Monday)
{
DateTime result = date;
while (result.DayOfWeek != startOfWeek)
result = date.AddDays(-1);
return result.Date;
}
}