在.NET实体框架LINQ查询中按周比较两个日期？

Question

是否有一种简单的方法可以比较像这样的两个日期......

var times = (from d in db.TimeSet
             where d.EventDate.Week) == DateTime.ThisWeek &&                         
             d.Employee.Username == username
             select d).ToList();

Answer 1

public static int GetWeekNumber(DateTime date)
{
        CultureInfo ci = CultureInfo.CurrentCulture;
        int weekNum = ci.Calendar.GetWeekOfYear(date, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Monday);
        return weekNum;
}

和

var times = (from d in db.TimeSet
             where GetWeekNumber(d.EventDate) == GetWeekNumber(DateTime.Now) &&                         
             d.Employee.Username == username
             select d).ToList();

您可能需要查看CalendarWeekRule以选择符合您需求的那个。