Question

在DAL中：

public IQueryable<T> QueryObjectGraph(Expression<Func<T, bool>> filter, params string[] children)
    {
        foreach (var child in children)
        {
            dbset.Include(child);
        }

        return dbset.Where(filter);
    }

在BLL中：

public IQueryable<Breed_Translated> QueryObjectGraph(System.Linq.Expressions.Expression<Func<Breed_Translated, bool>> filter, params string[] children)
    {
        return _r.QueryObjectGraph(filter, children);
    }

在控制器中：

var breeds = _breedTranslatedRepository.QueryObjectGraph(b => b.Culture == culture, new string[] {"Breed", "AnimalType_Breed" }).ToList();

问题：我可以恢复所有breed_translateds但无法计算如何按AnimalTypeId过滤？

我可以使用理解语法在DAL中执行此操作：

var queryTest=from bt in Breed_Translateds
join atb in AnimalType_Breeds
on bt.BreedId equals atb.BreedId
where bt.Culture=="en" && atb.AnimalTypeId ==2

但是想用扩展方法语法在LINQ上做得更好：像...那样的东西 var breeds = _breedTranslatedRepository.QueryObjectGraph（b =＆gt; b.Culture == culture，new string [] {“Breed”，“AnimalType_Breed”}）。ToList（） .Where（at =＆gt; at.AnimalTypeId = = 3）;

LINQ for ... QueryObjectGraph（Expression <func <t，bool =“”>＆gt; filter，params string [] children）</func <t，>

0 个答案: