EntityFramework 快速添加嵌套实体

Question

我在数据库中有这些模型。我有一组代表这些模型和关系的 POCO。我需要将它们添加到数据库并创建它们之间的关系。所有对象的数量都像 200k。最有效的方法是什么？

public class A
{
    private ICollection<B> children;

    public A()
    {
        this.children = new HashSet<B>();
    }

    public int Id { get; set; }

    public virtual ICollection<B> Children
    {
        get { return this.children; }
        set { this.children = value; }
    }
}

public class B
{
    private ICollection<C> children;

    public B()
    {
        this.children = new HashSet<C>();
    }

    public int Id { get; set; }

    public int AId { get; set; }

    public virtual A A { get; set; }

    public virtual ICollection<C> Children
    {
        get { return this.children; }
        set { this.children = value; }
    }
}

public class C
{
    private ICollection<D> children;

    public C()
    {
        this.children = new HashSet<D>();
    }

    public int Id { get; set; }

    public int BId { get; set; }

    public virtual B B { get; set; }

    public virtual ICollection<D> Children
    {
        get { return this.children; }
        set { this.children = value; }
    }
}

public class D
{
    private ICollection<E> children;

    public D()
    {
        this.children = new HashSet<E>();
    }

    public int Id { get; set; }

    public int CId { get; set; }

    public virtual C C { get; set; }

    public virtual ICollection<E> Children
    {
        get { return this.children; }
        set { this.children = value; }
    }
}

public class E
{
    public int Id { get; set; }

    public int DId { get; set; }

    public virtual D D { get; set; }
}

Answer 1

如果您的意思是最快的方法，请使用原始 ADO.NET，甚至考虑使用 SqlBulkCopy。

您也可以考虑将 TVP 与原始 ADO.NET 一起使用，而不是 BULK COPY