How can I reject all changes in a Linq to SQL's DataContext?

Question

On Linq to SQL\'s DataContext I am able to call SubmitChanges() to submit all changes.

What I want is to somehow reject all changes in the datacontext and rollback a

Answer 1

You can use the GetOriginalEntityState(..) to get the original values for the objects e.g. Customers using the old cached values.

You can also iterate through the changes e.g. updates and refresh the specific objects only and not the entire tables because the performance penalty will be high.

foreach (Customer c in MyDBContext.GetChangeSet().Updates)
        {
            MyDBContext.Refresh(System.Data.Linq.RefreshMode.OverwriteCurrentValues, c);
        }

this will revert the changes using persisted data in the database.

Another solution is to dump the datacontext you use, using Dispose().

In any case it is a good practice to override the Insert and Remove methods in the collection of e.g. Customers you use and add e.g. an InsertOnSubmit() call. This will resolve your issue with pending Insertions and Deletions.