Entity Cloner

Optimistic Concurrency Updates using Entity Framework in N-Tier and N-Layer Applications (Part 2)

Cesar da la Torre Blog — Tue, 28 Oct 2008 16:21:45 GMT

This is my second post about "Updating data using Entity Framework in N-Tier and N-Layer Applications"

Optimistic Concurrency Updates using Entity Framework in N-Tier and N-Layer Applications (Part 2)

Cesar da la Torre Blog — Mon, 27 Oct 2008 19:58:17 GMT

This is my second post about "Updating data using Entity Framework in N-Tier and N-Layer Applications"

Optimistic Concurrency Updates using Entity Framework in N-Tier and N-Layer Applications (Part 2)

External Aggregated Posts — Fri, 05 Sep 2008 04:52:07 GMT

This is my second post about "Updating data using Entity Framework in N-Tier and N-Layer Applications"

Optimistic Concurrency Updates using Entity Framework in N-Tier and N-Layer Applications (Part 2)

Cesar de la Torre - BLOG — Thu, 04 Sep 2008 23:09:56 GMT

This is my second post about "Updating data using Entity Framework in N-Tier and N-Layer Applications".

re: Entity Cloner

Matthieu MEZIL — Sun, 31 Aug 2008 18:26:46 GMT

Strange, can you send me a code project with this exception please.

re: Entity Cloner

Dale — Sat, 30 Aug 2008 09:23:44 GMT

Hi Matthieu,

I'm using your code, the method Clone is okay, but the method CloneWithGraph throw an exception: "The EntityKey property can only be set when the current value of the property is null.", what does it mean ? and how to work around with this ?

please help

thanks

re: Entity Cloner

Matthieu MEZIL — Sat, 30 Aug 2008 06:37:04 GMT

Can you send me your project at matthieu.mezil@winwise.fr please.

Thanks

re: Entity Cloner

Dat Dinh — Sat, 30 Aug 2008 03:03:49 GMT

It does not work with mine, the exception is:

"The method or operation is not implemented."

please help me to work around with this, thanks

re: Entity Cloner

Matthieu MEZIL — Tue, 19 Aug 2008 12:16:00 GMT

I am sorry, I don't understand the question. What does asm mean? assembly?

re: Entity Cloner

sniddy — Tue, 19 Aug 2008 08:11:07 GMT

what kind of asm is that? ...

re: Entity Cloner

Matthieu MEZIL — Wed, 04 Jun 2008 08:22:08 GMT

Without your code, it's hard to know why you have a bug but I update my method. I replace some cloneILGenerator.Emit(OpCodes.Ldloc_S, value) by cloneILGenerator.Emit(OpCodes.Ldloc, value).

Say me please if it works fine now and if no and if it's possible, send me your code please.

Thanks

Matthieu

re: Entity Cloner

Matthieu MEZIL — Tue, 03 Jun 2008 10:12:46 GMT

Thanks for feed back.

I use Nortwind DB. In My EDM, I include only Category et Product tables. I do simply this for my test:

Products p;
Categories c;
using (var context = new NorthwindEntities1())
{
    c = context.Categories.Include("Products").First();
    p = c.Products.First();
    var cLast = context.Categories.Where(cl => cl.CategoryID == 2).First();
}
 
var p2 = p.Clone();
var p3 = p.CloneWithGraph();
var c2 = c.Clone();
var c3 = c.CloneWithGraph();
 

The problem of ILGenerator.Emit is it's very hard to debug.

Matthieu

re: Entity Cloner

Martin — Tue, 03 Jun 2008 10:05:33 GMT

Hi Matthieu

I am playing with the Cloner code at the moment and finding it very interesting.

I am geting an error on it at the moment but can't track it down. Its in the IL section somewhere.

Do you have an example of how to use the Cloner in an application as I may be doing it incorrectly?

Its fantastic work and I would love to see it running, if you can help that would be fantastic.

many thanks

Martin

mtrevena@reeds.net.au