Persistence Manager - HasChanges : (1) You can get the specific entities...

Thu, 12 Jul 2007 16:48:36 -700

Author: IdeaBlade
Subject: 230
Posted: 12-Jul-2007 at 4:48pm

(1) You can get the specific entities by asking for all entities that have a DataRowState of Added, Deleted, or Modified. For example, you can get all Employees with changes with this one line of code.

mEmployees = mPM.GetEntities<Employee>

(DataRowState.Added | DataRowState.Deleted | DataRowState.Modified);;

(2) You can tell which columns have changed by comparing the CurrentVersion of the object with the OriginalVersion. Here is how you can get the Current and Original FirstName of an Employee:

Employee aEmployee = mEmployees[0];

String currentFirstName = (String)aEmployee["FirstName", DataRowVersion.Current];

String originalFirstName = (String)aEmployee["FirstName", DataRowVersion.Original];

Persistence Manager - HasChanges : When the PersistenceManager.HasChanges...

Thu, 12 Jul 2007 16:46:10 -700

Author: Customer
Subject: 230
Posted: 12-Jul-2007 at 4:46pm

When the PersistenceManager.HasChanges is true,

1) Can the PM tell me which entities it thinks has changes?

2) For a specific entity which �HasChanges�, can the PM tell me which columns it thinks has changed?

DevForce Community Forum : Persistence Manager - HasChanges

Persistence Manager - HasChanges : (1) You can get the specific entities...

Persistence Manager - HasChanges : When the PersistenceManager.HasChanges...