SaveChanges() for multiple dbcontext with TransactionScope in Entity Framework 4.1

Question

I am using SaveChanges() method as given below:

objAdbContext of Database A

objBdbContext of Database B

Updating table of DB A as given below

public string SaveA()
{

//Some stuff

  objAdbContext.SaveChanges();

  string result=UpdateDatabaseB(some parameters)

  //Some stuff

}


public string UpdateDatabaseB(some parameters)

{

  //Some stuff

   objBdbContext.SaveChanges();

  return "Success";

}

This case Database B is not getting updated. Is it correct way of updating multiple databases?

Both are independent Databases and How to implement TransactionScope in this case?

Answer 1

Try this:

using (TransactionScope scope = new TransactionScope())
{
    // Save changes but maintain context1 current state.
    context1.SaveChanges(SaveOptions.DetectChangesBeforeSave);

    // Save changes but maintain context2 current state.
    context2.SaveChanges(SaveOptions.DetectChangesBeforeSave);

    // Commit succeeded since we got here, then completes the transaction.
    scope.Complete();

    // Now it is safe to update context state.
    context1.AcceptAllChanges();
    context2.AcceptAllChanges();
}

This sample was taken from this blog post:

Managing Transactions with Entity Framework 4