如何在实体框架中注释外键

Question

historically, I need the following data model:

public class Banner
{
    [Key]
    public int Id { get; set; }

    ???
    public int IdForResult { get; set; }
    ???
    public BannerResult Result { get; set; }
}

public class BannerResult
{
    [Key]
    public int Id { get; set; }

    ???
    public int IdForBanner { get; set; }
    ???
    public Banner Banner { get; set; }
}

how should i annotate it in entity framework?

Answer 1

When configuring foreign keys eg, one-to-one relationships, Entity Framework requires that the primary key of the dependent also be the foreign key.

Sample code

[Table("Accounts")]
public class DbAccount
{
    [Key]
    public int Id { get; set; }
    public string Username { get; set; }

    [InverseProperty("Account")]
    public virtual DbLicense License { get; set; }
}

[Table("Licenses")]
public class DbLicense
{
    [Key, ForeignKey("Account")]
    public int Id { get; set; }
    public int AccountId { get; set; }
    [InverseProperty("License")]
    public virtual DbAccount Account { get; set; }
}

Answer 2

public class Banner
{
    [Key]
    public int Id { get; set; }
    public int IdForResult { get; set; }
    [ForeignKey("IdForResult")]
    public BannerResult Result { get; set; }
}

public class BannerResult
{
    [Key]
    public int Id { get; set; }
    public int IdForBanner { get; set; }
    [ForeignKey("IdForBanner")]
    public Banner Banner { get; set; }
}