返回加入Linq C＃

Question

我正在嘗試將連接返回到我的班級，它給了我以下錯誤。

錯誤1無法將類型'System.Collections.Generic.List'隱式轉換為'System.Collections.Generic.List'C：\\ Projetos_ASP.NET \\ AdvanceTechniques \\ Models \\ Repository \\ ProductRepository.cs 40 30 AdvanceTechniques

請遵循以下代碼。

public List<Line> Get()
{
    return context.
        Lines.
        Join(
            context.Products,
            lines => lines.ID,
            products => products.LineID,
            ((products, lines)
                => new { lines, products}
        )).
        OrderByDescending(products => products.products.ID).ToList();
}

關注我的實體

public partial class Line
    {
        public Line()
        {
            this.Products = new List<Product>();
        }
        [Required]
        public long ID { get; set; }
        [Required]
        public string Name { get; set; }
        [Required]
        public string Slug { get; set; }
        [Required]
        public string DesktopImage { get; set; }
        [Required]
        public string MobileImage { get; set; }
        [Required]
        public string AltImage { get; set; }
        [Required]
        public int Position { get; set; }
        [Required]
        public bool IsActive { get; set; }

        public virtual List<Product> Products { get; set; }
    }

Answer 1

您不需要Join來為每一行返回產品，您只需要包含產品然后返回它們，如：

return context.Lines.Include("Products").ToList();