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Entity Framework - How to create a base entity without generics

How about keep the generic IRepository interface and define another interface as a shortcut for default key (int, guid, etc) Something like this:

public interface IRepository<K,
    where K : IComparable, IComparable<K>
    where E : BaseUniqueEntity<K>

public interface IRepository<E> :
IRepository<int, E>
    where E : BaseUniqueEntity<int>

When defining concrete Repository:

public class UserRepository<User>

Categories : C#

Related to : Entity Framework - How to create a base entity without generics
Entity Framework Error: Specified Include Path Is Not Valid for Virtual Entity
Thanks Ben... Your property is called SiteSettingOption (no s) but you are trying to Include("SiteSettingOptions") (notice the final s). Remove the last s. You can avoid this by using the Include extension that uses lambdas rather than strings this would be something like Include(x => x.SiteSettingOption)

Categories : C#
Entity Framework 6 Email Checking causes 'Attaching an Entity failed' exception
If you want to make sure that there are no duplicate email addresses in the database, including preventing a user from entering a new email address that is already in use, I would solve it this way: try { // Make sure that there is an existing user, since this is an edit var existingUser = db.Users.FirstOrDefault(x => x.ID.Equals(user.Id)); if (existingUser == null) throw n

Categories : C#
LINQ to entity Error: "Unable to create a null constant value of type ''System.Int32[]". Only entity types, enumeration types
It sounds like one of your Int32[] types is null. Try adding a check for that before accessing the .Contains methods: var subjLocal = customerContext.RosterSummaryData_Subject_Local.Where(s => (s.fkRosterSetID == 0) && (statsInfo.TestInstanceIDsList != null && statsInfo.TestInstanceIDsList.Contains(s.fkTestInstanceID)) && (s.fkTestTypeID == statsInf

Categories : C#
Upgrade from Entity Framework 6 to EF 7
There isn't really a way to do this yet. In general we strongly recommend against trying to upgrade an EF6 application to EF7 yet. EF7 is still very much pre-release. We will have some guidance on how to do this when we get closer to RTM. We may provide some tools to help or just some guidance on how to do it.

Categories : Entity Framework
Is it must to use entity framework for db handling in MVC?
No it is not a must. You can implement your database layer. But the thing you need is define Models for MVC: public class MyClass { [Display(Name = "SomeName")] [Required(ErrorMessage = "required")] public int? SomeId { get; set; } //... } for scaffolding. Here is example implementation for DataAdapter: public class MyController : Controller { public ActionResult

Categories : Asp Net Mvc
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