How to compare only date components from DateTime in EF?

c# linq entity-framework linq-to-entities datetime-comparison
pencilslate picture pencilslate · Sep 25, 2009 · Viewed 139.3k times · Source

I am having two date values, one already stored in the database and the other selected by the user using DatePicker. The use case is to search for a particular date from the database.

The value previously entered in the database always has time component of 12:00:00, where as the date entered from picker has different time component.

I am interested in only the date components and would like to ignore the time component.

What are the ways to do this comparison in C#?

Also, how to do this in LINQ?

UPDATE: On LINQ to Entities, the following works fine.

e => DateTime.Compare(e.FirstDate.Value, SecondDate) >= 0

Answer

Mandeep Janjua picture Mandeep Janjua · Mar 10, 2012

Use the class EntityFunctions for trimming the time portion.

using System.Data.Objects;    

var bla = (from log in context.Contacts
           where EntityFunctions.TruncateTime(log.ModifiedDate) ==  EntityFunctions.TruncateTime(today.Date)
           select log).FirstOrDefault();

Source: http://social.msdn.microsoft.com/Forums/en-US/csharpgeneral/thread/84d4e18b-7545-419b-9826-53ff1a0e2a62/

UPDATE

As of EF 6.0 and later EntityFunctions is replaced by DbFunctions.

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