entity-framework - 使 byte[] 属性延迟加载

Question

我正在使用 EF4 Code First 并且我有一个属性:

public byte[] Bytes {get;set;}

我可以让这个属性延迟加载(仅在需要时加载)吗？

Answer 1

表拆分在 EF 4.1 RC 中有效:

public class Item
{
    public int Id { get; set; }
    ...
    public virtual ItemDetail ItemDetail { get; set; }
}

public class ItemDetail
{
    public int Id { get; set; }
    public byte[] Bytes { get; set; }
}

public class Context : DbContext
{
    public DbSet<Item> Items { get; set; }
    public DbSet<ItemDetail> ItemDetails { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);

        modelBuilder.Entity<Item>().ToTable("Items");
        modelBuilder.Entity<ItemDetail>().ToTable("Items");
        modelBuilder.Entity<Item>()
            .HasRequired(i => i.ItemDetail)
            .WithRequiredPrincipal();
    }
}