public ActionResult nAdetUrunGet(string categoryName,int count)
 {
     NAdetUrunGetModel model = new NAdetUrunGetModel();
     PrepareCategoryHash categoryHash = new PrepareCategoryHash();
     model.CategoryName = categoryName;
     model.Coun = count;
     categoryHash.CreateHashTableAndProductTree();
     var ProductTree=(ProductGroupTree)categoryHash.GetCategoryTable[categoryName];
     if (ProductTree != null)
     {
        //var productList = ProductTree.ProductHeap.GetProductByCount(count,ProductTree.TreeSize);
         ProductHeap heap = new ProductHeap();
         ProductTree.inOrderForProductsAllProduct(ProductTree.GetRoot());
         var productList = ProductTree.AllProductByCategoryName;
         foreach (var item in productList)
         {
             heap.insert(item);
         }
         var productsLowPrice = heap.GetProductByCount(count,ProductTree.ProductTotalSize);//get lower product by count
         ProductTree.DeleteProducts(ProductTree.GetRoot(), productsLowPrice.Select(x => x.ProductId).ToList());//update products in tree
         model.Products = productsLowPrice;
         foreach (var item in productsLowPrice)
         {
             Invoice invoice = new Invoice();
             invoice.ProductId = item.ProductId;
             invoice.CustomerID = CurrentUser.CustmerID;
             invoice.DateTime = DateTime.Now;
             invoice.Approval = false;
             invoice.ProductNumber = 1;
             _checkoutService.AddInvoice(invoice);//sepete eklendi
             var product = _productService.GetProductByProductId(item.ProductId);//entitiy update
             product.ProductNumber = product.ProductNumber - 1;
             _productService.UpdateProduct(product);
         }
     }
     return View(model);
 }