How can I use entity framework to query the database server for the current datetime?

entity-framework entity-framework-4 entity-framework-6

Question

I have an entity with a ModifiedDateTime property which I want to be updated with the current datetime from the database instead of the "application" server executing the application.

Every time I want to update or add a person to my datebase on SQL Server 2008 I want to fill ModifiedDateTime filed. It's not like I can change update query as with data adapter command when I work with dataset and to define for my ModifiedDateTime filed to be GetDate(). I created stored function to return me a value of GetDate() method, but I have a problem to import procedure which returns values as int, string or no value at all, already just entity values as Person for example in my case. Why is that?

Anyway, it would be of great help if you can help me to retrieve the current DateTime from the database server.

1
10
2/21/2019 10:58:15 AM

Accepted Answer

Is there a reason you just can't push it down to your database? If you include DateTime.Now in your entity query, it will push it down (getdate) to the database.

Example linq to entities

 var dQuery = dbContext.CreateQuery<DateTime>("CurrentDateTime() ");
 DateTime dbDate = dQuery.AsEnumerable().First();

SQL Generated ..

SELECT GetDate() AS [C1] FROM  ( SELECT cast(1 as bit) AS X ) AS [SingleRowTable1]

Might be a better way to do it ?

13
2/11/2016 3:55:30 PM

Popular Answer

This is an update of @Nix response to EF4:

var dateQuery = dbContext.Database.SqlQuery<DateTime>("SELECT getdate()");
DateTime serverDate = dateQuery.AsEnumerable().First();


Related Questions





Related

Licensed under: CC-BY-SA with attribution
Not affiliated with Stack Overflow
Licensed under: CC-BY-SA with attribution
Not affiliated with Stack Overflow