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我有以下存储库方法：-

public AccountDefinition GetCustomer2(int id)
        {      var c = entities.AccountDefinitions.Where(p => p.ORG_ID == id)
               .Include(a => a.SDOrganization)
               .Include(a2 => a2.SiteDefinitions)
                .Include(a3 => a3.SDOrganization.AaaPostalAddresses)
                .Include(a4 => a4.SiteDefinitions.Select(a5 => a5.DepartmentDefinitions.Select(a6 => a6.SDUsers.Select(a7 => a7.AaaUser.AaaContactInfoes)))).SingleOrDefault();
return c; }

但是当我注释一些代码时，我发现调用Action方法时生成的SQL语句会是一样的：-

public AccountDefinition GetCustomer2(int id)
        {      var c = entities.AccountDefinitions.Where(p => p.ORG_ID == id)
           //    .Include(a => a.SDOrganization)
            //   .Include(a2 => a2.SiteDefinitions)
                .Include(a3 => a3.SDOrganization.AaaPostalAddresses)
                .Include(a4 => a4.SiteDefinitions.Select(a5 => a5.DepartmentDefinitions.Select(a6 => a6.SDUsers.Select(a7 => a7.AaaUser.AaaContactInfoes)))).SingleOrDefault();
return c; }

那么这是否意味着当我导航到嵌套导航属性时，EF 也会自动检索父导航属性？. 所以例如当我写的时候.Include(a3 => a3.SDOrganization.AaaPostalAddresses)，就没有必要写了.Include(a => a.SDOrganization)

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1 回答 1

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简而言之，是的，否则您无法遍历该导航属性

例如，访问的唯一方法AccountDefinition.SDOrganization.AaaPostalAddresses是 ifSDOrganization不为空。

话虽如此，我个人的偏好是通过列出这个中间包含来明确它。虽然这没有任何功能上的好处，但它提醒您该属性也将被退回

于 2013-07-11T23:55:16.253 回答