Is there a way to remove change tracking mechanism for a single entity?

Change tracking for many-to-many connections in Entity Framework 4.1+

How can I detect changes of ICollection<> properties (many-to-many relationships)?...public class Company { ... public virtual ICollection<Employee> Employees { get; set; } } using (DataContext context = new DataContext(Properties.Settings.Default.ConnectionString)) { Company company = context.Companies.First(); company.Employees....

In System.Data.Entity.dll (Entity Framework), why am I receiving a NullReferenceException?

I have a ...List<State>... of ...State... entity objects, and each ...State... object has collections of other objects, such as ...Licenses..., ...Taxes..., ...Bonds..., etc...There's also a collection for ...ExpiredObjects..., which is a list of any object which is expired and needs to be renewed. For some reason, this property is giving me a ...N...

Entity Framework 6.0 not auto-generating 'On Changing' or 'On Change' partial methods for table fields

I am generating entity framework classes from a SQL Server table. However I am not seeing the partial methods like the example below:...partial void OnFirstNameChanging(global::System.String value); partial void OnFirstNameChanged(); ...I am using VS2012 & EF6.0. Many online examples talks about over-ridding these partial methods in newly created p...

Entity Framework 6: audit/track changes

I have my core project in C#....I work on a database, where some tables have the columns "user_mod" and "date_mod" for sign who and when made some mods and the same with "data_new" and "user_new"....My question: is there a way to centralize this and make this data inserted automatically, where I create the instance of ...dbContext...?...If not, I w...

Entity Framework selectively save tracked entities from context and bulk insert others

I'm fairly new to Entity Framework. I've come across a scenario where I have my entities:...public class Company{ public int Id { get; set; } public string Name { get; set; } public IList<Project> Projects{ get; set; } } public class Project { public int Id { get; set; } public List<ProjectRecord> ProjectRecords { get; set; } ...

Track changes to collections using Entity Framework change tracker

For auditing/history purposes, I am using the Entity Framework change tracker to determine, before writing changes, what has changed and serialize the changes. I can get the changed entities by calling ...this.ChangeTracker.Entries()... in my ...DbContext... derivative and looking at the values for anything marked ...EntityState.Added..., ...Entit...

Entity Framework, Load multiple entities by primary key in a single query while still using caching

I have a list of primary key ids for a table whose entities I want to pull into EF memory, modify, and then save....With a single id you would do something like...var entity = dbContext.Entity.Find(id); entity.SomeColumn = "something"; dbContext.SaveChanges() ...Currently I'm doing something like this to pull all the entities to be modified in on...

Entity framework change tracking after calling ToList()

I am struggling to understand something with change tracking in EF6....I have code similar to this....public class SomeClass { private List<User> _users; private DAL _dal; public void ProcessUsers() { _users = _dal.GetUsers(); foreach(var u in users) { u.user.Comment = "This is a test"; ...

instance of entity type cannot be tracked because another instance with same key value is tracked

I'm using generic repository pattern in asp.net core 2.0 which can not dispose repository object, when I am going to update the entry its updated for one time successfully but when I am trying to update for more then once it throws the following exception:...The instance of entity type 'Company' cannot be tracked because another instance with the s...

Remove cascade on delete from a single path

Follwing my data models. I stripped all the unimportant annotations to keep it short and clean....public class Bubble { public int Id { get; set; } public string Name { get; set; } public ICollection<Level> Levels { get; set; } } public class Level { public int Id { get; set; } public int BubbleId { get; set; } [ForeignKey(...