实体框架LINQ查询2表

Question

我无法在db.Restaurants对象上使用Include("CITies")扩展方法。

当我使用了包括我得到以下错误： DL.RESTAURANT does nto contain a definition for include or an extension method of include

namespace DL 
{ 
    public class DLgetRestaurants 
    { 
     DL.FVRGDataContext db = new FVRGDataContext(); 

     public IEnumerable <RESTAURANT> getRestaurants(string cuisineName) 
     { 
      var restaurantList = 
       from RESTAURANT in db.RESTAURANTs.Include("CITies") 
       where RESTAURANT.CITies.Any(t => t.CITY_ID == 2) 
       orderby RESTAURANT.REST_NAME ascending 
       select RESTAURANT; 

      return restaurantList; 
     } 
    } 
} 

Answer 1

您只能使用在具有与另一个表的关系实体包括。除此之外，你不应该有问题。