How to store images using Entity Framework Code First CTP 5?

How to declare one to one relationship using Entity Framework 4 Code First (POCO)

Three methods:...A) Declare both classes with navigation properties to each other. Mark one of the tables (the dependent table) with the ForeignKey attribute on its Primary Key. EF infers 1-to-1 from this:...public class AppUser { public int Id { get; set; } public string Username { get; set; } public OpenIdInfo OpenIdInfo { get; set;...

Entity Framework CTP 4 - Code First Custom Database Initializer

This is the easiest way to get ...EF Code First... running on ...AppHarbor...! ...Using the ...EdmMetadata.TryGetModelHash(context)... function to check when the model doesn't match the database and showing an error with the new code that needs to be used after you run alteration scripts....PopulateOnly : Only creates objects when the database is e...

Entity Framework Code First Using One column as Primary Key and another as Auto Increment Column

Apparently the ...answer... of @IronMan84 correct. But it didn't work for me. I slightly modified it to apply my another condition. And it worked. I did nothing else....This is my solution....public class Sale { [DatabaseGenerated(DatabaseGeneratedOption.Identity)] public int Id { get; set; } [Key, Column(TypeName = "varchar"), MaxLeng...

Select distinct on one column only using Entity Framework Code First

You can use ...DistinctBy(m=> m.SentBy)

Entity Framework 6 One-Way relationship using Code First

You are getting an error because ...HeaderBackgroundColorId... is a non-nullable ...int..., so it cannot be optional....All you need to do to achieve what you're looking for is to turn the foreign key into a nullable ...int.........public int? HeaderBackgroundColorID { get; set; } ...Because you named the foreign key to match the navigation propert...

How to define a one to one self reference using Entity Framework Code First

public class Stuff { public int Id { get; set; } public int? NextVersionId { get; set; } public int? PrevVersionId { get; set; } public virtual Stuff NextVersion { get; set; } public virtual Stuff PrevVersion { get; set; } } ...Updated: ...modelBuilder.Entity<Stuff>().HasOptional(t => t.NextVersion).WithMany().HasForeignKey...

One to many relationship with junction table using Entity Framework code first

Sorry to resurrect this thread, but I wanted to share a utility I created to handle a WebApi that had many instances of this same kind of relationship. We have multiple business objects which each have relationships to EventHistory, Messages, Files, etc, and it was messy keeping track of all the FluentAPI functions. Here's what I came up with:... ...

Entity Framework code-first error when using stored procedure with fields that have default value

Per @CodeNotFound suggestion.... The return from the TestInsert stored procedure must return the entire result set and not just the SCOPE_IDENTITY()... Not only that but the stored procedure must contain a parameter for each "mapped" field in the entity model. ...My last line it the InsertTest stored procedure looks something like this. ...SELECT...

How to import existing stored procedure in Entity Framework code-first from entity data wizard?

You don't need to import the procedures. ...Use of exisitng store procedures(InsertStudent,UpdateStudent) are shown in code sample. Just need to override ...OnModelCreating... method and map store procedures with entities....Kindly refer to this page ...http://www.entityframeworktutorial.net/EntityFramework6/code-first-insert-update-delete-stored-p...

How to import stored procedure using code first ASP.NET MVC and Entity Framework

I usually use stored procedures in the following way:...add a EF code first migration (...https://www.entityframeworktutorial.net/code-first/code-based-migration-in-code-first.aspx...) ...add the stored procedure to your migration through ...Sql()...configure the stored procedure with the model builder or in your entity...use it in your code :-)...