Question

I have a a User class and related UserRequest, so VS designer created User.UserRequests for me.

Occasionally I execute a task to remove inactive UserRequests as follows:

Dim requests = From req In db.UserRequests Where req.LastActivity < DateTime.Now.Subtract(New TimeSpan(0, 0, KeepRequestInterval)) Select req 


For Each req In requests 

    db.UserRequests.DeleteOnSubmit(req )
Next

When I access the User.UserRequests, removed Requests are still there, unless I call db.SubmitChanges() after removing them, before accessing User.UserRequests.

Is there any way to force removal of deleted Requests from User.UserRequests without an additional call to SubmitChanges()?

Answer 1

No, this is by design. http://msdn.microsoft.com/en-us/library/bb399378.aspx

Regardless of how many changes you make to your objects, changes are
made only to in-memory replicas. You have made no changes to the
actual data in the database. Your changes are not transmitted to the
server until you explicitly call SubmitChanges on the DataContext.

Only after Submitchanges will your deletes be removed.