How to ask the database server for current datetime using entity framework?

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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.

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 ?

Entity Framework DateTime and UTC, current community. Close Property)] public class DateTimeKindAttribute : Attribute { private readonly DateTimeKind _kind; public Just call the same method on source in all cases public new void Dispose() { source. This will store the time zone with the date value in the database (SQL Server 2015 in my case). Or change the type of the column in SQL Server to datetime2(7) which has the same precision as the .NET DateTime type Or provide your GroupDate with less precision so that the value can be stored completely in a SQL datetime type without being cut off, for example only with seconds precision and the milliseconds being 0 :

This is an update of @Nix response to EF4:

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

How to get the current time of sql server? � Issue #4362 � dotnet , Hi, In EF6, we get sql server current time, like this DateTime FirstOrDefault (); But EF7, Database. Since the beginning of our DbContext not contain any Entity, Successfully merging a pull request may close this issue. Problem with generate DateTime with Entity Framework. I guess the problem is the database cannot generated the current time, so it insert NULL value.

An update for .net core 2.0

var dual =  databaseContext
            .Set<Dual>()
            .FromSql("SELECT -1 AS Id, GETDATE() AS DateTime")
            .First();

The fake entity

public class Dual
{
    public int Id { get; set; }
    public DateTime DateTime { get; set; }
}

Timestamp Attribute in EF 6 & EF Core, Learn about the [Timestamp] data annotation attribute in EF 6 and EF Core. Configure One-to-Many � Configure Many-to-Many � From Existing DB � Cascade Delete It creates a column with timestamp data type in the SQL Server database. will be included in the where clause whenever you update an entity and call the� public class Application { public Application() { ModifiedDate = DateTime.Now; } } By the way: You got the exception because per default c# DateTime is more precise than datetime of SQL. Like the message says: Use datetime2 in SQL. DateTime has it's min value as initial value, which is too low for SQL datetime.

In VS 2008, if you add a function template to return a scalar, it does not add the code to make it easy to use. You need to access the function template directly -- I use the partial class to build the needed methods for ease of use. They fixed this in VS2010.

    public DateTime GetDateTime()
    {
        var returnValue = new DateTime();
        using (var connection = new EntityConnection(Connection.ConnectionString))
        {
            connection.Open();
            using (var command = connection.CreateCommand())
            {
                command.CommandText = "myStoredProc";
                command.CommandType = CommandType.StoredProcedure;
                try
                {
                    returnValue = Convert.ToDateTime(command.ExecuteScalar());
                }
                finally
                {
                    connection.Close();
                }
            }
        }
        return returnValue;
    }

More information: Function Imports in Entity Model with a non-Entity Return Type

Razor Pages with Entity Framework Core in ASP.NET Core, Shows how to create a Razor Pages app using Entity Framework Core. The Visual Studio instructions use SQL Server LocalDB, a version of SQL string FirstMidName { get; set; } public DateTime EnrollmentDate { get; set; } use async if they call EF Core methods that send queries to the database. See Get Entity Framework for information on installing the latest version of the Entity Framework Tools. 1. Create an Existing Database. Typically when you are targeting an existing database it will already be created, but for this walkthrough we need to create a database to access. Let's go ahead and generate the database. Open Visual Studio

Datetime column and entity framework, My data model (Entity Framework 6.1.3, ASP.NET MVC 5, Code First with an existing database, SQL Server 2016) includes a “Title” table with a� I'm using Entity Framework and in the entity class Dates, the attributes are DateTime and I need to compare that with a user's input, and the only solution I found was the CreateDate function. As you know, I cannot compare the POST value directly with a Date attribute.

Ef core default date value, EF 7 set initial default value for DateTime column. 1. NET Core, ef Although you can use HTML5 controls for Date and Date Time Picker, it doesn't look good on the page. Cisco IP Indeed, in a relational database, using the Entity Framework Core Support. The datetime2 data type was introduced in SQL Server 2008. Steps to create new database by using code first in Entity framework Note - I am using Visual Studio 2015 for creating this project. Step 1 - Create Windows form project Visual Studio, File menu, New, then click Project . Select “Window” from templates and select “Window Form application”.

Entity framework created date modified date, MinValue; //public DateTime CreatedOn; public DateTime CreatedOn { get Many of When the data Validation of Entity with Entity Framework is a tricky way, but it is NET LINQ Entity Framework Core LINQ to Entities SQL Server SQL EF Core . Good examples of such fields are Created By, Created Date, Modified By or� With this in place, whenever Entity Framework loads an entity from the database, it will set the DateTimeKind that you specify, such as UTC. Note that this doesn't do anything when saving. You'll still have to have the value properly converted to UTC before you try to save it.

Comments
  • Which version of .NET and Visual Studio are you using?
  • This works just fine. I found out about this datetime canonical functions, but I didn't know how to use them from code behind. I saw that they can be used in CSDL. Thanks.
  • Update: no longer have direct access to CreateQuery method - need to cast it first - like this: var query = ((IObjectContextAdapter)dbContext).ObjectContext.CreateQuery<DateTime>("CurrentDateTime() ");