Compare Date values in Entity Framework

问题

I'm trying to compare date values in entity framework.

DateTime selectedDate = Calendar1.SelectedDate;      
var result = context.EventsTable.Where(ev =>ev.EventDate.Equals(selectedDate));

ev.EventDate is coming from SQL Server 2008 and selectedDate is ASP:Calendar's Selected date. In SQL Server 2008 date is stored as: 2012-09-03 00:00:00 whereas date value from Calendar's SelectedDate is in 2012-09-03 12:00:00AM format.

回答1:

You should probably truncate EventDate:

context.EventsTable
    .Where(ev => EntityFunctions.TruncateTime(ev.EventDate) == selectedDate)

provided that selectedDate is truncated as well (by DateTime.Date).

来源：https://stackoverflow.com/questions/12394954/compare-date-values-in-entity-framework