[英]How to use linq's .Include() when using EF 4.1 on an inverse property?
I am having trouble figuring out how to use .Include()
to be able to access this nested relationship. 我在弄清楚如何使用
.Include()
才能访问此嵌套关系时遇到了麻烦。 I tried what seemed like the most direct way but intellisense doesn't populate and when I hand enter the relation there is a compilation error. 我尝试了看似最直接的方法,但是智能感知并没有填充,当我手动输入关系时,出现了编译错误。
I have this db mapped setup 我有这个数据库映射设置
public class W
{
public int WId { get; set; }
public virtual ICollection<T> Ts { get; set; }
}
public class T
{
public int TId { get; set; }
public int WId { get; set; }
public int CId { get; set; }
public virtual W W { get; set; }
public virtual C { get; set; }
}
public class C
{
public int CId { get; set; }
public virtual ICollection<T> Ts { get; set; }
}
I have a get method which queries 我有一个查询的方法
//set in constructor
DbSet<W> dbSet;
DbContext context;
//called in method
IQueryable<W> query = dbSet;
query = query.Include(w => w.Ts);//works
query = query.Include(w => w.Ts.C); //I wanted to do this but it doesn't work
.Include()
like this? .Include()
吗? It seemed like it was going to work with no hitch but apparently I am doing it wrong. 似乎可以顺利进行,但显然我做错了。 I would prefer not to have to iterate through the Ts collection and then populate their C manually each time.
我希望不必遍历Ts集合,然后每次手动填充C。
您可以使用以下语法:
query = query.Include(w => w.Ts.Select(t => t.C));
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