// GET: Shop
 public ActionResult Index(int categoryid = 0, int colorid = 0, string name = "")
 {
     ViewBag.category = category.GetAll();
     ViewBag.colors   = color.GetAll();
     if (categoryid != 0)
     {
         return(View(product.GetProductsByCategory(categoryid)));
     }
     if (colorid != 0)
     {
         return(View(product.GetProductsByColor(colorid)));
     }
     return(View(product.GetAll()));
 }