Entity Framework 通过导航名称（字符串）进行核心预加载

Question

我有 2 个实体类，如下所示：

public class Office
{
    public int Id { get; set; }
    public string Address { get; set; }
    public string Telephone { get; set; }
    public int CityId { get; set; }

    public City City { get; set; }
}

public class City
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int ProvinceId { get; set; }

    public Province Province { get; set; }
}

我知道我可以通过这些方式包含城市：

IQueryable<Office> offices = _context.Offices.Include(o => o.City);

//or

IQueryable<Office> offices = _context.Offices.Include("City");

并包括省市：

IQueryable<Office> offices = _context.Offices.Include(o => o.City).ThenInclude(c=>c.Province);

我的问题是，有什么方法可以使用字符串参数来ThenInclude省份吗？类似于 Include("City.Province") 或 ThenInclude("Province").

Answer 1

只需使用：

Include("City").Include("City.Province")

Entity Framework 通过导航名称（字符串）进行核心预加载

Entity Framework Core eager loading by navigation name(string)

entity-framework-core

asp.net-core

ef-core-5.0