CODEWITHSUNDEEP
entity-frameworkauto-incremententity-framework-6
Madhawas
Madhawas

Reputation: 391

Entity Framework auto increment with starting value

I have a entity as follows

[Table("ESS_POS_SE_VERSION")]
public class Version
{
    [Key, Column("DETAIL_ID"), DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int Id { get; set; }

    [Column("DETAIL_TITILE")]
    public string DetailKey { get; set; }

    [Column("DETAIL")]
    public string Detail { get; set; }
}

SO Id column is auto increment column, but I need to set its starting value to 1000. How can I do it?

Upvotes: 5

Views: 11144

Answers (3)

nativehr
nativehr

Reputation: 1161

Consider creating a custom database initializer. It will be called each time your database is created or recreated.

For example:

public class MyInitializer : DropCreateDatabaseIfModelChanges<TContext> where TContext : DbContext
{
    protected override void Seed(TContext context)
    {
        context.Database.ExecuteSqlCommand("DBCC CHECKIDENT('MyTable', RESEED, 1000);");
    }
}

Then register it:

protected void Application_Start()
{
    Database.SetInitializer<MyContext>(new MyInitializer());
}

Upvotes: 9

codebased
codebased

Reputation: 7073

There is no way to set through Property or Attribute. However, you can run the command on this event:

Probably you can set through Alter: ALTER TABLE [MyTable] ALTER COLUMN [IdentityColumn] IDENTITY (1000,1).

protected override void OnModelCreating(DbModelBuilder modelBuilder)
    { context.Database.ExecuteSqlCommand(ALTER TABLE [MyTable] ALTER COLUMN [IdentityColumn] IDENTITY (1000,1)) }

Upvotes: 0

sarin
sarin

Reputation: 5307

context.Database.ExecuteSqlCommand("ALTER TABLE Version ALTER COLUMN DETAIL_ID IDENTITY (1000,1)");

Upvotes: -1

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