Linq2SQL: Update object not created in datacontext

Question

Normally when you update an object in linq2sql you get the object from a datacontext and use the same datacontext to save the object, right?

What\'s the best way to

Answer 1

To update an existing but disconnected object, you need to "attach" it do the data context. This will re-use the existing primary key etc. You can control how to handle changes- i.e. treat as dirty, or treat as clean and track future changes, etc.

The Attach method is on the table - i.e.

ctx.Customers.Attach(customer); // optional bool to treat as modified