您可以使用任何一种流畅的API:
public class Category{ public int CategoryId1 { get; set; } public int CategoryId2 { get; set; } public string Name { get; set; } public virtual ICollection<Product> Products { get; set; }}public class Product{ public int ProductId { get; set; } public string Name { get; set; } public int CategoryId1 { get; set; } public int CategoryId2 { get; set; } public virtual Category Category { get; set; }}public class Context : DbContext{ public DbSet<Category> Categories { get; set; } public DbSet<Product> Products { get; set; } protected override void onModelCreating(DbModelBuilder modelBuilder) { base.onModelCreating(modelBuilder); modelBuilder.Entity<Category>() .HasKey(c => new {c.CategoryId1, c.CategoryId2}); modelBuilder.Entity<Product>() .HasRequired(p => p.Category) .WithMany(c => c.Products) .HasForeignKey(p => new {p.CategoryId1, p.CategoryId2}); }}
public class Category{ [Key, Column(Order = 0)] public int CategoryId2 { get; set; } [Key, Column(Order = 1)] public int CategoryId3 { get; set; } public string Name { get; set; } public virtual ICollection<Product> Products { get; set; }}public class Product{ [Key] public int ProductId { get; set; } public string Name { get; set; } [ForeignKey("Category"), Column(Order = 0)] public int CategoryId2 { get; set; } [ForeignKey("Category"), Column(Order = 1)] public int CategoryId3 { get; set; } public virtual Category Category { get; set; }}
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