ADO.NET Entity Framework: Create an Object Using the Static Create Method (C#)

Question

I wrote this:


using (GuiaMovilEntities guiaEntity = new GuiaMovilEntities())
{
   try
   {
     Cliente cliente = 
        Cliente.CreateCliente(-1, datosCliente.Email, datosCliente.Password);
   }
   catch
   {
   }
}

It's unfinished.

If table Cliente (represented by Cliente object) has its first row (clienteID) as IDENTITY column.

Is it correct to put -1 as clienteID value?

Thanks!

Dmitri Nesteruk · Accepted Answer · 2009-03-17 07:42:52Z

2

Identity parameters are auto-generated - you shouldn't need to specify the value yourself.

answered Mar 17, 2009 at 7:42

Dmitri Nesteruk

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3 Comments

ajbeaven Over a year ago

So you should use the default static Create method that the entity framework object creates or do you just enter in 0 as the ID?

Dmitri Nesteruk Over a year ago

I'd imagine that if it's auto-generated, you don't need to enter anything at all. Certainly don't assign 0 to the ID.

ajbeaven Over a year ago

Hmm doesn't seem to be the case for me when I generate an .edmx from the database I have, though perhaps that's another question.

Mike Christiansen · Accepted Answer · 2009-03-17 12:08:03Z

1

Here's another option:

Cliente cliente = new Cliente
{
    Email = datosCliente.Email,
    Password = datosCliente.Password
};

answered Mar 17, 2009 at 12:08

Mike Christiansen

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Comments

James L · Accepted Answer · 2009-03-17 07:41:44Z

0

No, you don't ever need to set the Id. Remove the parameter from the factory method and leave the Id value as the default (zero in this case I imagine).

answered Mar 17, 2009 at 7:41

James L

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Comments

Davy Landman · Accepted Answer · 2009-03-17 08:10:44Z

0

if you really want a undefined id which is not 0, such as -1, you could implement the default constructor for your entity and set it there.

answered Mar 17, 2009 at 8:10

Davy Landman

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