Updating one entity with one context, and inserting a new with another context?

Question

Greetings and thanks for reading my post.. :

I am updating an entry (Photo) within a using

using (context = new PhotoEntities())
{
    // ...

    cont         


        

Answer 1

The answer to this question is just a reminder to myself and to everyone else having issues to understand why Entity Framework inserts, updates etc.. fails with no obvious chance to get a specific error out of it "out of the box".

So by doing stuff like this :

try
            {
                pcontext.SaveChanges();
            }
            catch (System.Data.Entity.Core.UpdateException e)
            {

            }

            catch (System.Data.Entity.Infrastructure.DbUpdateException ex) //DbContext
            {
                Console.WriteLine(ex.InnerException);
            }

            catch (Exception ex)
            {
                Console.WriteLine(ex.InnerException);
                throw;
            }

you can actually get the exact and very specific error you are looking for.

In my case.. i forgot to set Auto Increment on the identity, resulting in all records inserted was of ID 0 (zero).