Hello Alejandro,
>>Could you get the same information now that my entities do notinherit from EntityObject.
For achieving what you want, it is not clear what approach you are using(Database first? Code first?). If you uses code first approach, you need to make sure your entities meet
requirements for Creating POCO Proxies:
https://msdn.microsoft.com/en-us/library/dd468057(v=vs.100).aspx, these proxies are actually would be similar the
EntityObject type which implements the
IEntityWithChangeTracker or
IEntityWithRelationships interfaces and you could modify the extend method as a static method and pass the entity object to check its state as:
namespace CFs
{
class Program
{
static void Main(string[] args)
{
try
{
using (SC20150430 db = new SC20150430())
{
//db.Database.CreateIfNotExists();
db.Configuration.ProxyCreationEnabled = true;
var order = db.Posts.FirstOrDefault();
var neworder = order as IEntityWithRelationships; // Also get NULL
Console.WriteLine(HasDeleteConstraints(neworder));
}
#endregion
}
catch (Exception)
{
throw;
}
}
public static bool HasDeleteConstraints(object obj)
{
// Get all related ends
IEnumerable<IRelatedEnd> relEnds = ((IEntityWithRelationships)obj).RelationshipManager.GetAllRelatedEnds();
foreach (IRelatedEnd relEnd in relEnds)
{
RelationshipEndMember rsem =
relEnd.RelationshipSet.ElementType.RelationshipEndMembers[relEnd.SourceRoleName];
if (rsem.RelationshipMultiplicity == RelationshipMultiplicity.One ||
rsem.RelationshipMultiplicity == RelationshipMultiplicity.ZeroOrOne)
{
if (rsem.DeleteBehavior != OperationAction.Cascade)
{
IEnumerable collection = relEnd.CreateSourceQuery();
foreach (var item in collection)
{
return true;
}
}
}
}
return false;
}
}
}
If you are using the database first approach, since these entity are generated by the T4 template, you need to customize the T4 template to let it generate POCO entity class for you:
https://msdn.microsoft.com/en-us/data/gg558520.aspx and use above code to get the entity state similarly.
Regards
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