关于实体框架的问题 [英] Question about entity framework

问题描述

我对实体框架实体模型有一点疑问。实体框架使用ICollection创建模型的导航属性。但由于索引，我需要List。



我的问题是;我可以将这些属性更改为如下所示的列表吗？



谢谢。



我的尝试：

Hi,

I have a little question about entity framework entity models. The entity framework creates model's navigation properties with ICollection. But I need List's because of indexing.

My question is; Can I change these properties to Lists like below?

Thank you.

What I have tried:

public partial class Student
{
    public Student()
    {
        Courses = new HashSet<Course>();
    }

    public int ID;
    public string Name;

    public virtual ICollection<Course> Courses { get; set; }
}

to

to

public partial class Student
{
    public Student()
    {
        Courses = new HashSet<Course>();
    }

    public int ID;
    public string Name;

    public virtual IList<Course> Courses { get; set; }
}

推荐答案

使用 IList< T> 将有效很好，虽然索引到列表中并没有多大意义，因为相关实体不会有预先定义的订单。



但是， HashSet< T> 未实现 IList< T> ，因此您必须选择其他类 - 列出< T> 或许。

Using IList<T> will work fine, although it doesn't really make sense to index into the list, since there won't be a pre-defined order for the related entities.

However, HashSet<T> doesn't implement IList<T>, so you'll have to pick a different class - List<T> perhaps.

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