Entity Framework data cloning

Question

Entity Framework data cloning

entity-framework

Question

I'm developing software that will allow users to build new products off of existing ones.

I now need to use Entity Framework to do copying and cloning actions. I first began by writing as follows:

foreach(sourcedata1 in table1)
{
   ... create new table
   ... copy data
   ... create Guid
   ... add
   foreach(sourcedata2 in table2)
   {
       ... create new table
       ... copy data
       ... create Guid
       ... add       

       ... and so on
   }
}

Problem is, that's not a very classy way to go about it. Is there a quick method to transfer data—aside from Guid, which has to be produced for new rows—or should I copy everything by hand?

Another option

To duplicate the properties, you might alternatively use EmitMapper or AutoMapper.

Tx3

Popular Answer

You may just detach the entity from the database in Entity Framework to clone an entity.DataContext then add it once more to theEntityCollection .

context.Detach(entity);
entityCollection.Add(entity);

for EF6+, Update (from comments)

context.Entry(entity).State = EntityState.Detached;
entity.id = 0;
entity.property = value;
context.Entry(entity).State = EntityState.Added;
context.SaveChanges();

ChrisNel52