创建一个LINQ查询,该查询将包括本周的所有条目,不包括今天和昨天

本文关键字:查询 昨天 今天 不包括 一个 创建 LINQ 包括本 | 更新日期: 2023-09-27 17:58:33

我正在进行LINQ查询,以检索本周的所有记录,但是,我需要排除今天和昨天的任何记录。

以下是我目前所拥有的:

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();

上述查询的问题是它没有返回正确的记录,还显示了今天的记录。

创建一个LINQ查询,该查询将包括本周的所有条目,不包括今天和昨天

假设您的DateFunctions.GetFirstDayOfWeek工作正常

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:若本周的开始时间不在昨天之前,那个么您将不会得到任何记录。否则昨天总是在本周末之前。

如何正确开始本周:

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;
    }
}

只有当今天和昨天的记录与运行报告时的时间相同时,才排除它们。

尝试

DateTime startThisWeek = DateFunctions.GetFirstDayOfWeek(DateTime.Now.Date).AddDays(1);
DateTime endOfThisWeek = startThisWeek.AddDays(6);
DateTime today = DateTime.Now.Date;
DateTime yesterday = DateTime.Now.Date.AddDays(-1);
var notificationList = 
(from n in db.DashboardNotifications
             .OrderByDescending(n => n.NotificationDateTime)
 where (n.NotificationDateTime >= startThisWeek && 
        n.NotificationDateTime.Date <= endOfThisWeek) &&  
       (n.NotificationDateTime.Date != today && 
        n.NotificationDateTime.Date != yesterday)
 select n).ToList();

这是假设将来有可能发出通知。

Ps,我不确定DateFunctions是什么。GetFirstDayOfWeek方法没有,也没有为什么要添加1天。