linq - 无法将类型 ‘System.Linq.IQueryable<AnonymousType#1>’ 隐式转换为 ‘System.Collections.Generic.IEnumerable<SubCateViewModel>’

Question

当我尝试连接三个表 ProductPhoto、Product 和 ProductProductPhoto 时，出现此问题。我尝试了很多案例，但都没有成功。任何人都可以帮助我摆脱这个困境吗？感谢您的回复!

private IEnumerable<SubCateViewModel> GetSubProduct()
            {
                var context = new AdvenDBEntities();
                var subcate = (from a in context.ProductPhotoes
                              join b in context.ProductProductPhotoes on a.ProductPhotoID equals b.ProductPhotoID
                              join c in context.Products on b.ProductID equals c.ProductID
                              join d in context.ProductSubcategories on c.ProductSubcategoryID equals d.ProductSubcategoryID
                              select new
                              {
                                  a.ProductPhotoID,
                                  a.ThumbnailPhotoFileName,
                                  c.ProductID,
                                  c.Name,
                                  d.NameofBike,
                                  d.isSelected,
                              }).AsQueryable();
                         return subcate;
            }

Answer 1

试试下面的代码伙计..

private IEnumerable<SubCateViewModel> GetSubProduct()
                {
                    var context = new AdvenDBEntities();
                    var subcate = (from a in context.ProductPhotoes
                                  join b in context.ProductProductPhotoes on a.ProductPhotoID equals b.ProductPhotoID
                                  join c in context.Products on b.ProductID equals c.ProductID
                                  join d in context.ProductSubcategories on c.ProductSubcategoryID equals d.ProductSubcategoryID
                                  select new SubCateViewModel
                                  {
                                     ProductPhotoID =  a.ProductPhotoID,
                                      ThumbnailPhotoFileName = a.ThumbnailPhotoFileName,
                                     ProductID = c.ProductID,
                                      Name = c.Name,
                                      NameofBike = d.NameofBike,
                                      isSelected = d.isSelected,
                                  });
                             return subcate.AsEnumerable();
                }