实体框架代码中的种子主键在SQL Server Compact Edition中首先为0

Question

I have this Entity Framework code first class:

public class ClientEvent
{
    [Key]
    public int? EventCode { get; set; }
    public string Description { get; set; }
}

With this seed function for SQL Server Compact Edition:

protected override void Seed(ClientEventsContext context)
{
    var clientEvent = new ClientEvent
    {
        EventCode = 0,
        Description = "Test"
    };
    context.Events.Add(clientEvent);
    base.Seed(context);
}

When I check the database table for ClientEvent after it runs, I see this entry:

EventCode   |   Description
---------------------------
1           |   Test

Notice how the EventCode is 1? I would expect it to be 0. How can I seed this primary key to start at 0? I have tried using the code above, but even utilizing 0 itself sets the first entry to 1.

There is another question similar to this which works for SQL Server, but not SQL Server Compact Edition . I have tried using its suggested answer to set the initializer to 0:

context.Database.ExecuteSqlCommand("DBCC CHECKIDENT ('ClientEvents', RESEED, 0)");

The problem with this is:

System.Data.SqlServerCe.SqlCeException: There was an error parsing the query. [ Token line number = 1,Token line offset = 1,Token in error = DBCC ]

Is there not a standard way of doing this with Entity Framework code first, irrelevant of the type of database being used?

Answer 1

您可以将此语句与SQL Server Compact一起使用：

ALTER TABLE [MyTable] ALTER COLUMN [Id] IDENTITY (0,1)