entity-framework-5

I have two entities in 1:n relationship: Category and Product. public class Category { public int CategoryID { get; set; } public string CategoryName { get; set; } public virtual ICollection<Product> Products { get; set; } } public class Product { public int ProductID { get; set; } public string ProductName { get; set; } public virtual Product { get; set; } } public class context : DbContext { public DbSet<Category> Categories { get; set; } public DbSet<Product> Products { get; set; } } Its possible to load products in every category by Eager loading. context.Categories.Include(c=>c.Products)

I have a SQL Server 2012 in which I have AWARD table with two columns TITLE and MONTH. TITLE is varchar(256) and cannot be NULL. MONTH is int and can be NULL. With VS2012 Ultimate and EF 5.0.0, the TextBoxFor helper in MVC4 app is not producing validation (data-val="required" and data-val-required="required message") for the TITLE columne above, but in the same View, MONTH is getting the correct validation markup. The .edmx designer does show TITLE is NonNullable, BUTT, the automatically generated AWARD.cs file does not have the [Required] attribute for the TITLE column. What can I try? @model

I have .NET 4.0 WinForms Application, and I use Entity Framework 5 with Model First Approach. In VS EF Designer, I have created a dozen or so entities with a lot of scalar properties of String type, then in Properties Toolbar I have configured parameters (i.e. General parameters, Facets Parameters) for them, to fit DB requirements. In BL layer I am able to validate entity object in purpose to check whether it contains correct values, for example by using DbContext.Entry(Of T)(entity).GetValidationResult() method. But I need to develop also GUI layer input fields validation for WinForms. I

I am attempting to use Entity Framework 5 to query an existing MySQL database. I used code-first to create a code-based model that maps to an existing database following this tutorial on MSDN . I have two tables: users and buddies . A User has an id , a name and an email . A Buddy has a user_id and a buddy_id . A User has many Buddies (which are also Users ). The buddy_id column is a foreign key back into the Users table. So each User has many Users through Buddies . public class User { public int Id { get; set; } public string Name { get; set; } public string Email { get; set; } public IList

I am using Entity Framework 5.0.0.0 in a .net 4.5 console application and I have to access a database with two tables in it with a foreign key relationship between them like so: The odd thing about it is that the foreign key is between B(Almost1, Almost2) and A(Almost1, Almost2) not from B(AId) to A(AId) . This is allowed by SQL server as Almost1 and Almost2 combined are unique and neither are nullable (on table A at least - on B they are as it is an optional relationship but that is by the by). Here's some SQL for creating this situation: CREATE TABLE [dbo].[A]( [AId] [int] IDENTITY(1,1) NOT

I've decided to use fluent mapping in Entity Framework. My intention was to map everyting by code without any atributes and auto mapping functions. Best way I've found is class EntityTypeConfiguration, that I implement for each entity in my project. Later I add property to one of my entity. This property isn't needed to be persisted. I've expected, that until I add mapping for this property, it will be ignored by database and persistence layer. Unfortunatly it doesn't work that way, and property is mapped. Only way is to use Ignore method or NotMapped attribute, but I don't want to do it