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c# Programming Glossary: context.savechangesHow to rollback a transaction in Entity Framework http://stackoverflow.com/questions/1070040/how-to-rollback-a-transaction-in-entity-framework in usersToAdd context.AddToUsers new User Name user try context.SaveChanges Exception thrown user 'gasdff6' already exist. catch Exception..
How to create initializer to create and migrate mysql database? http://stackoverflow.com/questions/15796115/how-to-create-initializer-to-create-and-migrate-mysql-database else context.Database.Create Seed context context.SaveChanges protected virtual void Seed TContext context and internal.. base.InitializeDatabase context if doseed Seed context context.SaveChanges This works around half way not seeding if migration goes first...
http://stackoverflow.com/questions/249587/high-quality-image-scaling-c-sharp
Autonumber with Entity Framework http://stackoverflow.com/questions/3011764/autonumber-with-entity-framework contact context.AddToInstructors instructor try context.SaveChanges catch Exception ex Console.WriteLine ex.ToString System.InvalidOperationException..
Update Row if it Exists Else Insert Logic with Entity Framework http://stackoverflow.com/questions/5557829/update-row-if-it-exists-else-insert-logic-with-entity-framework Attached object tracks modifications automatically context.SaveChanges If you can use any knowledge about the object's key you can.. else context.MyEntities.AddObject myEntity context.SaveChanges If you can't decide existance of the object by its Id you must..
Fastest Way of Inserting in Entity Framework http://stackoverflow.com/questions/5940225/fastest-way-of-inserting-in-entity-framework AddToContext context entityToInsert count 100 true context.SaveChanges finally if context null context.Dispose scope.Complete private.. context.Set Entity .Add entity if count commitCount 0 context.SaveChanges if recreateContext context.Dispose context new MyDbContext..
Create code first, many to many, with additional fields in association table http://stackoverflow.com/questions/7050404/create-code-first-many-to-many-with-additional-fields-in-association-table memberComment2 will also add comment2 context.SaveChanges 2 Add a third comment of member1 var member1 context.Members.Where.. memberComment3 will also add comment3 context.SaveChanges 3 Create new member and relate it to the existing comment2 var.. Something 201 context.MemberComments.Add memberComment4 context.SaveChanges 4 Create relationship between existing member2 and comment3..
http://stackoverflow.com/questions/7583770/unable-to-update-the-entityset-because-it-has-a-definingquery-and-no-updatefu DateTime.Now I am getting this errror when I try to do context.SaveChanges I get the error Unable to update the EntitySet because it has..
Cascade delete in entity framework ( table per type inheritance ) http://stackoverflow.com/questions/9064273/cascade-delete-in-entity-framework-table-per-type-inheritance in b.A1s.ToList context.As.Remove a1 context.Bs.Remove b context.SaveChanges context.As.Remove a1 should delete from both A and A1 table..
http://stackoverflow.com/questions/9083709/the-relationship-between-the-two-objects-cannot-be-defined-because-they-are-atta context.TrainingUczestnicies.Attach try context.SaveChanges catch Exception ex string excepion ex.InnerException.ToString.. else context.Szkolenies.AddObject currentSzkolenie context.SaveChanges context.Detach currentSzkolenie So after I saved Training.. context.SzkolenieUczestnicies.Attach try context.SaveChanges catch Exception ex string excepion ex.InnerException.ToString..
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