public static int CountProductsInCart(this Customer customer, ShoppingCartType cartType, int? storeId = null)
        {
            int count = customer.ShoppingCartItems
                .Filter(cartType, storeId)
                .Where(x => x.ParentItemId == null)
                .Sum(x => x.Quantity);

            return count;
        }

        public static IEnumerable<ShoppingCartItem> Filter(this IEnumerable<ShoppingCartItem> shoppingCart, ShoppingCartType type, int? storeId = null)
        {
            var enumerable = shoppingCart.Where(x => x.ShoppingCartType == type);

            if (storeId.HasValue)
                enumerable = enumerable.Where(x => x.StoreId == storeId.Value);

            return enumerable;
        }

        public virtual void AddToCart(Customer customer, Product product, ShoppingCartType shoppingCartType, int quantity)
        {
            if (customer == null)
                throw new ArgumentNullException("customer");

            if (product == null)
                throw new ArgumentNullException("product");

            var cart = customer.ShoppingCartItems
                .Where(sci => sci.ShoppingCartType == shoppingCartType)
                .ToList();

            var shoppingCartItem = FindShoppingCartItemInTheCart(cart, shoppingCartType, product);

            if (shoppingCartItem != null)
            {
                //update existing shopping cart item
                shoppingCartItem.Quantity = shoppingCartItem.Quantity + quantity;
                shoppingCartItem.UpdatedOnUtc = DateTime.UtcNow;
                _customerService.UpdateCustomer(customer);
            }
            else
            {
                //new shopping cart item
                DateTime now = DateTime.UtcNow;
                shoppingCartItem = new ShoppingCartItem()
                {
                    ShoppingCartType = shoppingCartType,
                    Product = product,
                    ItemPrice = product.Price,
                    Quantity = quantity,
                    CreatedOnUtc = now,
                    UpdatedOnUtc = now
                };
                customer.ShoppingCartItems.Add(shoppingCartItem);
                _customerService.UpdateCustomer(customer);

                //updated "HasShoppingCartItems" property used for performance optimization
                customer.HasShoppingCartItems = customer.ShoppingCartItems.Count > 0;
                _customerService.UpdateCustomer(customer);
            }
        }

        /// <summary>
        /// Validates shopping cart item
        /// </summary>
        /// <param name="customer">Customer</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
        /// <param name="productVariant">Product variant</param>
        /// <param name="selectedAttributes">Selected attributes</param>
        /// <param name="customerEnteredPrice">Customer entered price</param>
        /// <param name="quantity">Quantity</param>
        /// <param name="automaticallyAddRequiredProductVariantsIfEnabled">Automatically add required product variants if enabled</param>
        /// <param name="getStandardWarnings">A value indicating whether we should validate a product variant for standard properties</param>
        /// <param name="getAttributesWarnings">A value indicating whether we should validate product attributes</param>
        /// <param name="getGiftCardWarnings">A value indicating whether we should validate gift card properties</param>
        /// <param name="getRequiredProductVariantWarnings">A value indicating whether we should validate required product variants (product variants which require other variant to be added to the cart)</param>
        /// <returns>Warnings</returns>
        public virtual IList<string> GetShoppingCartItemWarnings(Customer customer, ShoppingCartType shoppingCartType,
            ProductVariant productVariant, string selectedAttributes, decimal customerEnteredPrice,
            int quantity, bool automaticallyAddRequiredProductVariantsIfEnabled,
            bool getStandardWarnings = true, bool getAttributesWarnings = true, 
            bool getGiftCardWarnings = true, bool getRequiredProductVariantWarnings = true)
        {
            if (productVariant == null)
                throw new ArgumentNullException("productVariant");

            var warnings = new List<string>();

            //standard properties
            if (getStandardWarnings)
                warnings.AddRange(GetStandardWarnings(customer, shoppingCartType, productVariant, selectedAttributes, customerEnteredPrice, quantity));

            //selected attributes
            if (getAttributesWarnings)
                warnings.AddRange(GetShoppingCartItemAttributeWarnings(shoppingCartType, productVariant, selectedAttributes));

            //gift cards
            if (getGiftCardWarnings)
                warnings.AddRange(GetShoppingCartItemGiftCardWarnings(shoppingCartType, productVariant, selectedAttributes));

            //required product variants
            if (getRequiredProductVariantWarnings)
                warnings.AddRange(GetRequiredProductVariantWarnings(customer, shoppingCartType, productVariant, automaticallyAddRequiredProductVariantsIfEnabled));

            return warnings;
        }

        /// <summary>
        /// Validates shopping cart item attributes
        /// </summary>
        /// <param name="shoppingCartType">Shopping cart type</param>
        /// <param name="productVariant">Product variant</param>
        /// <param name="selectedAttributes">Selected attributes</param>
        /// <returns>Warnings</returns>
        public virtual IList<string> GetShoppingCartItemAttributeWarnings(ShoppingCartType shoppingCartType,
            ProductVariant productVariant, string selectedAttributes)
        {
            if (productVariant == null)
                throw new ArgumentNullException("productVariant");

            var warnings = new List<string>();

            //selected attributes
            var pva1Collection = _productAttributeParser.ParseProductVariantAttributes(selectedAttributes);
            foreach (var pva1 in pva1Collection)
            {
                var pv1 = pva1.ProductVariant;
                if (pv1 != null)
                {
                    if (pv1.Id != productVariant.Id)
                    {
                        warnings.Add("Attribute error");
                    }
                }
                else
                {
                    warnings.Add("Attribute error");
                    return warnings;
                }
            }

            //existing product attributes
            var pva2Collection = productVariant.ProductVariantAttributes;
            foreach (var pva2 in pva2Collection)
            {
                if (pva2.IsRequired)
                {
                    bool found = false;
                    //selected product attributes
                    foreach (var pva1 in pva1Collection)
                    {
                        if (pva1.Id == pva2.Id)
                        {
                            var pvaValuesStr = _productAttributeParser.ParseValues(selectedAttributes, pva1.Id);
                            foreach (string str1 in pvaValuesStr)
                            {
                                if (!String.IsNullOrEmpty(str1.Trim()))
                                {
                                    found = true;
                                    break;
                                }
                            }
                        }
                    }

                    //if not found
                    if (!found)
                    {
                        if (!string.IsNullOrEmpty(pva2.TextPrompt))
                        {
                            warnings.Add(pva2.TextPrompt);
                        }
                        else
                        {
                            warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.SelectAttribute"), pva2.ProductAttribute.GetLocalized(a => a.Name)));
                        }
                    }
                }
            }

            return warnings;
        }

        /// <summary>
        /// Finds a shopping cart item in the cart
        /// </summary>
        /// <param name="shoppingCart">Shopping cart</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
        /// <param name="productVariant">Product variant</param>
        /// <param name="selectedAttributes">Selected attributes</param>
        /// <param name="customerEnteredPrice">Price entered by a customer</param>
        /// <returns>Found shopping cart item</returns>
        public virtual ShoppingCartItem FindShoppingCartItemInTheCart(IList<ShoppingCartItem> shoppingCart,
            ShoppingCartType shoppingCartType,
            ProductVariant productVariant,
            string selectedAttributes = "",
            decimal customerEnteredPrice = decimal.Zero)
        {
            if (shoppingCart == null)
                throw new ArgumentNullException("shoppingCart");

            if (productVariant == null)
                throw new ArgumentNullException("productVariant");

            foreach (var sci in shoppingCart.Where(a => a.ShoppingCartType == shoppingCartType))
            {
                if (sci.ProductVariantId == productVariant.Id)
                {
                    //attributes
                    bool attributesEqual = _productAttributeParser.AreProductAttributesEqual(sci.AttributesXml, selectedAttributes);

                    //gift cards
                    bool giftCardInfoSame = true;
                    if (sci.ProductVariant.IsGiftCard)
                    {
                        string giftCardRecipientName1 = string.Empty;
                        string giftCardRecipientEmail1 = string.Empty;
                        string giftCardSenderName1 = string.Empty;
                        string giftCardSenderEmail1 = string.Empty;
                        string giftCardMessage1 = string.Empty;
                        _productAttributeParser.GetGiftCardAttribute(selectedAttributes,
                            out giftCardRecipientName1, out giftCardRecipientEmail1,
                            out giftCardSenderName1, out giftCardSenderEmail1, out giftCardMessage1);

                        string giftCardRecipientName2 = string.Empty;
                        string giftCardRecipientEmail2 = string.Empty;
                        string giftCardSenderName2 = string.Empty;
                        string giftCardSenderEmail2 = string.Empty;
                        string giftCardMessage2 = string.Empty;
                        _productAttributeParser.GetGiftCardAttribute(sci.AttributesXml,
                            out giftCardRecipientName2, out giftCardRecipientEmail2,
                            out giftCardSenderName2, out giftCardSenderEmail2, out giftCardMessage2);

                        if (giftCardRecipientName1.ToLowerInvariant() != giftCardRecipientName2.ToLowerInvariant() ||
                            giftCardSenderName1.ToLowerInvariant() != giftCardSenderName2.ToLowerInvariant())
                            giftCardInfoSame = false;
                    }

                    //price is the same (for products which require customers to enter a price)
                    bool customerEnteredPricesEqual = true;
                    if (sci.ProductVariant.CustomerEntersPrice)
                        customerEnteredPricesEqual = Math.Round(sci.CustomerEnteredPrice, 2) == Math.Round(customerEnteredPrice, 2);

                    //found?
                    if (attributesEqual && giftCardInfoSame && customerEnteredPricesEqual)
                        return sci;
                }
            }

            return null;
        }

 public static void ClearShoppingCart(ShoppingCartType shoppingCartType, Guid customerId)
 {
     SQLDataAccess.ExecuteNonQuery
        ("DELETE FROM Catalog.ShoppingCart WHERE ShoppingCartType = @ShoppingCartType and CustomerId = @CustomerId",
            CommandType.Text,
            new SqlParameter { ParameterName = "@ShoppingCartType", Value = (int)shoppingCartType },
            new SqlParameter { ParameterName = "@CustomerId", Value = customerId }
        );
 }

        public static ShoppingCart GetShoppingCart(ShoppingCartType shoppingCartType, Guid customerId)
        {
            var templist = SQLDataAccess.ExecuteReadList
                ("SELECT * FROM Catalog.ShoppingCart WHERE ShoppingCartType = @ShoppingCartType and CustomerId = @CustomerId",
                    CommandType.Text, GetFromReader,
                    new SqlParameter { ParameterName = "@ShoppingCartType", Value = (int)shoppingCartType },
                    new SqlParameter { ParameterName = "@CustomerId", Value = customerId }
                );

            var shoppingCart = new ShoppingCart();
            shoppingCart.AddRange(templist);
            return shoppingCart;
        }

 public static ShoppingCartItem GetExistsShoppingCartItem(Guid customerId, int offerId, string attributesXml, ShoppingCartType shoppingCartType)
 {
     return SQLDataAccess.ExecuteReadOne<ShoppingCartItem>(" SELECT * FROM [Catalog].[ShoppingCart] " +
          " WHERE [CustomerId] = @CustomerId  AND " +
                " [OfferId] = @OfferId AND " +
                " [ShoppingCartType] = @ShoppingCartType AND " +
                " [AttributesXml] = @AttributesXml",
             CommandType.Text,
             (reader) => new ShoppingCartItem
                 {
                     ShoppingCartItemId = SQLDataHelper.GetInt(reader, "ShoppingCartItemId"),
                     ShoppingCartType = (ShoppingCartType)SQLDataHelper.GetInt(reader, "ShoppingCartType"),
                     OfferId = SQLDataHelper.GetInt(reader, "OfferID"),
                     CustomerId = SQLDataHelper.GetGuid(reader, "CustomerId"),
                     AttributesXml = SQLDataHelper.GetString(reader, "AttributesXml"),
                     Amount = SQLDataHelper.GetInt(reader, "Amount"),
                     CreatedOn = SQLDataHelper.GetDateTime(reader, "CreatedOn"),
                     UpdatedOn = SQLDataHelper.GetDateTime(reader, "UpdatedOn"),
                     DesirePrice = SQLDataHelper.GetNullableFloat(reader, "DesirePrice"),
                 },
             new SqlParameter { ParameterName = "@CustomerId", Value = customerId },
             new SqlParameter { ParameterName = "@OfferId", Value = offerId },
             new SqlParameter { ParameterName = "@AttributesXml", Value = attributesXml ?? String.Empty },
             new SqlParameter { ParameterName = "@ShoppingCartType", Value = (int)shoppingCartType }
         );
 }

        /// <summary>
        /// Gets all customers
        /// </summary>
        /// <param name="createdFromUtc">Created date from (UTC); null to load all records</param>
        /// <param name="createdToUtc">Created date to (UTC); null to load all records</param>
        /// <param name="affiliateId">Affiliate identifier</param>
        /// <param name="vendorId">Vendor identifier</param>
        /// <param name="customerRoleIds">A list of customer role identifiers to filter by (at least one match); pass null or empty list in order to load all customers; </param>
        /// <param name="email">Email; null to load all customers</param>
        /// <param name="username">Username; null to load all customers</param>
        /// <param name="firstName">First name; null to load all customers</param>
        /// <param name="lastName">Last name; null to load all customers</param>
        /// <param name="dayOfBirth">Day of birth; 0 to load all customers</param>
        /// <param name="monthOfBirth">Month of birth; 0 to load all customers</param>
        /// <param name="company">Company; null to load all customers</param>
        /// <param name="phone">Phone; null to load all customers</param>
        /// <param name="zipPostalCode">Phone; null to load all customers</param>
        /// <param name="loadOnlyWithShoppingCart">Value indicating whether to load customers only with shopping cart</param>
        /// <param name="sct">Value indicating what shopping cart type to filter; userd when 'loadOnlyWithShoppingCart' param is 'true'</param>
        /// <param name="pageIndex">Page index</param>
        /// <param name="pageSize">Page size</param>
        /// <returns>Customers</returns>
        public virtual IPagedList<Customer> GetAllCustomers(DateTime? createdFromUtc = null,
            DateTime? createdToUtc = null, int affiliateId = 0, int vendorId = 0,
            int[] customerRoleIds = null, string email = null, string username = null,
            string firstName = null, string lastName = null,
            int dayOfBirth = 0, int monthOfBirth = 0,
            string company = null, string phone = null, string zipPostalCode = null,
            bool loadOnlyWithShoppingCart = false, ShoppingCartType? sct = null,
            int pageIndex = 0, int pageSize = 2147483647)
        {
            var query = _customerRepository.Table;

            if (createdFromUtc.HasValue)
                query = query.Where(c => createdFromUtc.Value <= c.CreatedOnUtc);
            if (createdToUtc.HasValue)
                query = query.Where(c => createdToUtc.Value >= c.CreatedOnUtc);
            if (affiliateId > 0)
                query = query.Where(c => affiliateId == c.AffiliateId);
            if (vendorId > 0)
                query = query.Where(c => vendorId == c.VendorId);
            query = query.Where(c => !c.Deleted);
            if (customerRoleIds != null && customerRoleIds.Length > 0)
                query = query.Where(c => c.CustomerRoles.Any(x => customerRoleIds.Contains(x.Id)));
            if (!String.IsNullOrWhiteSpace(email))
                query = query.Where(c => c.Email!=null && c.Email.ToLower().Contains(email.ToLower()));
            if (!String.IsNullOrWhiteSpace(username))
                query = query.Where(c => c.Username!=null && c.Username.ToLower().Contains(username.ToLower()));

            if (!String.IsNullOrWhiteSpace(firstName))
            {
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.FirstName && y.Value!=null && y.Value.ToLower().Contains(firstName.ToLower())));
            }

            if (!String.IsNullOrWhiteSpace(lastName))
            {
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.LastName && y.Value != null && y.Value.ToLower().Contains(lastName.ToLower())));
            }

            //date of birth is stored as a string into database.
            //we also know that date of birth is stored in the following format YYYY-MM-DD (for example, 1983-02-18).
            //so let's search it as a string
            if (dayOfBirth > 0 && monthOfBirth > 0)
            {
                //both are specified
                string dateOfBirthStr = monthOfBirth.ToString("00", CultureInfo.InvariantCulture) + "-" + dayOfBirth.ToString("00", CultureInfo.InvariantCulture);
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.DateOfBirth && y.Value != null && y.Value.ToLower().Contains(dateOfBirthStr.ToLower())));

            }
            else if (dayOfBirth > 0)
            {
                //only day is specified
                string dateOfBirthStr = dayOfBirth.ToString("00", CultureInfo.InvariantCulture);
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.DateOfBirth && y.Value != null && y.Value.ToLower().Contains(dateOfBirthStr.ToLower())));

            }
            else if (monthOfBirth > 0)
            {
                //only month is specified
                string dateOfBirthStr = "-" + monthOfBirth.ToString("00", CultureInfo.InvariantCulture) + "-";
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.DateOfBirth && y.Value != null && y.Value.ToLower().Contains(dateOfBirthStr.ToLower())));
            }
            //search by company
            if (!String.IsNullOrWhiteSpace(company))
            {
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.Company && y.Value != null && y.Value.ToLower().Contains(company.ToLower())));
            }
            //search by phone
            if (!String.IsNullOrWhiteSpace(phone))
            {
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.Phone && y.Value != null && y.Value.ToLower().Contains(phone.ToLower())));
            }
            //search by zip
            if (!String.IsNullOrWhiteSpace(zipPostalCode))
            {
                query = query.Where(x => x.GenericAttributes.Any(y => y.Key == SystemCustomerAttributeNames.ZipPostalCode && y.Value != null && y.Value.ToLower().Contains(zipPostalCode.ToLower())));
            }

            if (loadOnlyWithShoppingCart)
            {
//.........这里部分代码省略.........

        /// <summary>
		/// Add a product to shopping cart
        /// </summary>
        /// <param name="customer">Customer</param>
		/// <param name="product">Product</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
		/// <param name="storeId">Store identifier</param>
        /// <param name="selectedAttributes">Selected attributes</param>
        /// <param name="customerEnteredPrice">The price enter by a customer</param>
        /// <param name="quantity">Quantity</param>
		/// <param name="automaticallyAddRequiredProductsIfEnabled">Automatically add required products if enabled</param>
		/// <param name="shoppingCartItemId">Identifier fo the new shopping cart item</param>
		/// <param name="parentItemId">Identifier of the parent shopping cart item</param>
		/// <param name="bundleItem">Product bundle item</param>
        /// <returns>Warnings</returns>
        public virtual IList<string> AddToCart(Customer customer, Product product,
			ShoppingCartType shoppingCartType, int storeId, string selectedAttributes,
			decimal customerEnteredPrice, int quantity, bool automaticallyAddRequiredProductsIfEnabled,
			out int shoppingCartItemId, int? parentItemId = null, ProductBundleItem bundleItem = null)
        {
			shoppingCartItemId = 0;

            if (customer == null)
                throw new ArgumentNullException("customer");

            if (product == null)
                throw new ArgumentNullException("product");

            var warnings = new List<string>();
            if (shoppingCartType == ShoppingCartType.ShoppingCart && !_permissionService.Authorize(StandardPermissionProvider.EnableShoppingCart, customer))
            {
                warnings.Add("Shopping cart is disabled");
                return warnings;
            }
            if (shoppingCartType == ShoppingCartType.Wishlist && !_permissionService.Authorize(StandardPermissionProvider.EnableWishlist, customer))
            {
                warnings.Add("Wishlist is disabled");
                return warnings;
            }

            if (quantity <= 0)
            {
                warnings.Add(_localizationService.GetResource("ShoppingCart.QuantityShouldPositive"));
                return warnings;
            }

			if (parentItemId.HasValue && (parentItemId.Value == 0 || bundleItem == null || bundleItem.Id == 0))
			{
				warnings.Add(_localizationService.GetResource("ShoppingCart.Bundle.BundleItemNotFound").FormatWith(bundleItem.GetLocalizedName()));
				return warnings;
			}

            //reset checkout info
			_customerService.ResetCheckoutData(customer, storeId);

			var cart = customer.GetCartItems(shoppingCartType, storeId);
			OrganizedShoppingCartItem shoppingCartItem = null;

			if (bundleItem == null)
			{
				shoppingCartItem = FindShoppingCartItemInTheCart(cart, shoppingCartType, product, selectedAttributes, customerEnteredPrice);
			}

            if (shoppingCartItem != null)
            {
                //update existing shopping cart item
                int newQuantity = shoppingCartItem.Item.Quantity + quantity;

                warnings.AddRange(
					GetShoppingCartItemWarnings(customer, shoppingCartType, product, storeId, selectedAttributes, customerEnteredPrice, newQuantity, 
						automaticallyAddRequiredProductsIfEnabled, bundleItem: bundleItem)
				);

                if (warnings.Count == 0)
                {
                    shoppingCartItem.Item.AttributesXml = selectedAttributes;
                    shoppingCartItem.Item.Quantity = newQuantity;
                    shoppingCartItem.Item.UpdatedOnUtc = DateTime.UtcNow;
                    _customerService.UpdateCustomer(customer);

                    //event notification
                    _eventPublisher.EntityUpdated(shoppingCartItem.Item);
                }
            }
            else
            {
                //new shopping cart item
                warnings.AddRange(
					GetShoppingCartItemWarnings(customer, shoppingCartType, product, storeId, selectedAttributes, customerEnteredPrice, quantity,
						automaticallyAddRequiredProductsIfEnabled, bundleItem: bundleItem)
				);

                if (warnings.Count == 0)
                {
                    //maximum items validation
                    switch (shoppingCartType)
                    {
                        case ShoppingCartType.ShoppingCart:
                            if (cart.Count >= _shoppingCartSettings.MaximumShoppingCartItems)
                            {
//.........这里部分代码省略.........

        /// <summary>
        /// Validates shopping cart item
        /// </summary>
        /// <param name="customer">Customer</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
		/// <param name="product">Product</param>
		/// <param name="storeId">Store identifier</param>
        /// <param name="selectedAttributes">Selected attributes</param>
        /// <param name="customerEnteredPrice">Customer entered price</param>
        /// <param name="quantity">Quantity</param>
		/// <param name="automaticallyAddRequiredProductsIfEnabled">Automatically add required products if enabled</param>
        /// <param name="getStandardWarnings">A value indicating whether we should validate a product for standard properties</param>
        /// <param name="getAttributesWarnings">A value indicating whether we should validate product attributes</param>
        /// <param name="getGiftCardWarnings">A value indicating whether we should validate gift card properties</param>
        /// <param name="getRequiredProductWarnings">A value indicating whether we should validate required products (products which require other products to be added to the cart)</param>
		/// <param name="getBundleWarnings">A value indicating whether we should validate bundle and bundle items</param>
		/// <param name="bundleItem">Product bundle item if bundles should be validated</param>
		/// <param name="childItems">Child cart items to validate bundle items</param>
        /// <returns>Warnings</returns>
        public virtual IList<string> GetShoppingCartItemWarnings(Customer customer, ShoppingCartType shoppingCartType,
			Product product, int storeId, 
			string selectedAttributes, decimal customerEnteredPrice,
			int quantity, bool automaticallyAddRequiredProductsIfEnabled,
            bool getStandardWarnings = true, bool getAttributesWarnings = true, 
            bool getGiftCardWarnings = true, bool getRequiredProductWarnings = true,
			bool getBundleWarnings = true, ProductBundleItem bundleItem = null, IList<OrganizedShoppingCartItem> childItems = null)
        {
            if (product == null)
                throw new ArgumentNullException("product");

            var warnings = new List<string>();
            
            //standard properties
            if (getStandardWarnings)
                warnings.AddRange(GetStandardWarnings(customer, shoppingCartType, product, selectedAttributes, customerEnteredPrice, quantity));

            //selected attributes
            if (getAttributesWarnings)
                warnings.AddRange(GetShoppingCartItemAttributeWarnings(customer, shoppingCartType, product, selectedAttributes, quantity, bundleItem));

            //gift cards
            if (getGiftCardWarnings)
                warnings.AddRange(GetShoppingCartItemGiftCardWarnings(shoppingCartType, product, selectedAttributes));

            //required products
            if (getRequiredProductWarnings)
				warnings.AddRange(GetRequiredProductWarnings(customer, shoppingCartType, product, storeId, automaticallyAddRequiredProductsIfEnabled));

			// bundle and bundle item warnings
			if (getBundleWarnings)
			{
				if (bundleItem != null)
					warnings.AddRange(GetBundleItemWarnings(bundleItem));

				if (childItems != null)
					warnings.AddRange(GetBundleItemWarnings(childItems));
			}
            
            return warnings;
        }

        /// <summary>
        /// Validates shopping cart item attributes
        /// </summary>
		/// <param name="customer">The customer</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
		/// <param name="product">Product</param>
        /// <param name="selectedAttributes">Selected attributes</param>
		/// <param name="quantity">Quantity</param>
		/// <param name="bundleItem">Product bundle item</param>
        /// <returns>Warnings</returns>
		public virtual IList<string> GetShoppingCartItemAttributeWarnings(Customer customer, ShoppingCartType shoppingCartType,
			Product product, string selectedAttributes, int quantity = 1, ProductBundleItem bundleItem = null)
        {
            if (product == null)
                throw new ArgumentNullException("product");

            var warnings = new List<string>();

			if (bundleItem != null && !bundleItem.BundleProduct.BundlePerItemPricing)
				return warnings;	// customer cannot select anything... selectedAttribute is always empty

            //selected attributes
            var pva1Collection = _productAttributeParser.ParseProductVariantAttributes(selectedAttributes);
            foreach (var pva1 in pva1Collection)
            {
                var pv1 = pva1.Product;
                if (pv1 != null)
                {
                    if (pv1.Id != product.Id)
                    {
                        warnings.Add("Attribute error");
                    }
                }
                else
                {
                    warnings.Add("Attribute error");
                    return warnings;
                }
            }

            //existing product attributes
            var pva2Collection = product.ProductVariantAttributes;
            foreach (var pva2 in pva2Collection)
            {
                if (pva2.IsRequired)
                {
                    bool found = false;
                    //selected product attributes
                    foreach (var pva1 in pva1Collection)
                    {
                        if (pva1.Id == pva2.Id)
                        {
                            var pvaValuesStr = _productAttributeParser.ParseValues(selectedAttributes, pva1.Id);
                            foreach (string str1 in pvaValuesStr)
                            {
                                if (!String.IsNullOrEmpty(str1.Trim()))
                                {
                                    found = true;
                                    break;
                                }
                            }
                        }
                    }

					if (!found && bundleItem != null && bundleItem.FilterAttributes && !bundleItem.AttributeFilters.Exists(x => x.AttributeId == pva2.ProductAttributeId))
					{
						found = true;	// attribute is filtered out on bundle item level... it cannot be selected by customer
					}

                    if (!found)
                    {
                        if (pva2.TextPrompt.HasValue())
                            warnings.Add(pva2.TextPrompt);
                        else
                            warnings.Add(string.Format(_localizationService.GetResource("ShoppingCart.SelectAttribute"), pva2.ProductAttribute.GetLocalized(a => a.Name)));
                    }
                }
            }

			if (warnings.Count == 0)
			{
				var pvaValues = _productAttributeParser.ParseProductVariantAttributeValues(selectedAttributes);
				foreach (var pvaValue in pvaValues)
				{
					if (pvaValue.ValueType ==  ProductVariantAttributeValueType.ProductLinkage)
					{
						var linkedProduct = _productService.GetProductById(pvaValue.LinkedProductId);
						if (linkedProduct != null)
						{
							var linkageWarnings = GetShoppingCartItemWarnings(customer, shoppingCartType, linkedProduct, _storeContext.CurrentStore.Id,
								"", decimal.Zero, quantity * pvaValue.Quantity, false, true, true, true, true);

							foreach (var linkageWarning in linkageWarnings)
							{
								string msg = _localizationService.GetResource("ShoppingCart.ProductLinkageAttributeWarning").FormatWith(
									pvaValue.ProductVariantAttribute.ProductAttribute.GetLocalized(a => a.Name),
									pvaValue.GetLocalized(a => a.Name),
									linkageWarning);

								warnings.Add(msg);
//.........这里部分代码省略.........

		public virtual IList<string> Copy(OrganizedShoppingCartItem sci, Customer customer, ShoppingCartType cartType, int storeId, bool addRequiredProductsIfEnabled)
		{
			if (customer == null)
				throw new ArgumentNullException("customer");

			if (sci == null)
				throw new ArgumentNullException("item");

			int parentItemId, childItemId;

			var warnings = AddToCart(customer, sci.Item.Product, cartType, storeId, sci.Item.AttributesXml, sci.Item.CustomerEnteredPrice,
				sci.Item.Quantity, addRequiredProductsIfEnabled, out parentItemId);

			if (warnings.Count == 0 && parentItemId != 0 && sci.ChildItems != null)
			{
				foreach (var childItem in sci.ChildItems)
				{
					AddToCart(customer, childItem.Item.Product, cartType, storeId, childItem.Item.AttributesXml, childItem.Item.CustomerEnteredPrice,
						childItem.Item.Quantity, false, out childItemId, parentItemId, childItem.Item.BundleItem);
				}
			}
			return warnings;
		}

        /// <summary>
        /// Validates shopping cart item
        /// </summary>
        /// <param name="customer">Customer</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
        /// <param name="product">Product</param>
        /// <param name="storeId">Store identifier</param>
        /// <param name="attributesXml">Attributes in XML format</param>
        /// <param name="customerEnteredPrice">Customer entered price</param>
        /// <param name="rentalStartDate">Rental start date</param>
        /// <param name="rentalEndDate">Rental end date</param>
        /// <param name="quantity">Quantity</param>
        /// <param name="automaticallyAddRequiredProductsIfEnabled">Automatically add required products if enabled</param>
        /// <param name="getStandardWarnings">A value indicating whether we should validate a product for standard properties</param>
        /// <param name="getAttributesWarnings">A value indicating whether we should validate product attributes</param>
        /// <param name="getGiftCardWarnings">A value indicating whether we should validate gift card properties</param>
        /// <param name="getRequiredProductWarnings">A value indicating whether we should validate required products (products which require other products to be added to the cart)</param>
        /// <param name="getRentalWarnings">A value indicating whether we should validate rental properties</param>
        /// <returns>Warnings</returns>
        public virtual IList<string> GetShoppingCartItemWarnings(Customer customer, ShoppingCartType shoppingCartType,
            Product product, int storeId,
            string attributesXml, decimal customerEnteredPrice,
            DateTime? rentalStartDate = null, DateTime? rentalEndDate = null,
            int quantity = 1, bool automaticallyAddRequiredProductsIfEnabled = true,
            bool getStandardWarnings = true, bool getAttributesWarnings = true,
            bool getGiftCardWarnings = true, bool getRequiredProductWarnings = true,
            bool getRentalWarnings = true)
        {
            if (product == null)
                throw new ArgumentNullException("product");

            var warnings = new List<string>();
            
            //standard properties
            if (getStandardWarnings)
                warnings.AddRange(GetStandardWarnings(customer, shoppingCartType, product, attributesXml, customerEnteredPrice, quantity));

            //selected attributes
            if (getAttributesWarnings)
                warnings.AddRange(GetShoppingCartItemAttributeWarnings(customer, shoppingCartType, product, quantity, attributesXml));

            //gift cards
            if (getGiftCardWarnings)
                warnings.AddRange(GetShoppingCartItemGiftCardWarnings(shoppingCartType, product, attributesXml));

            //required products
            if (getRequiredProductWarnings)
                warnings.AddRange(GetRequiredProductWarnings(customer, shoppingCartType, product, storeId, automaticallyAddRequiredProductsIfEnabled));

            //rental products
            if (getRentalWarnings)
                warnings.AddRange(GetRentalProductWarnings(product, rentalStartDate, rentalEndDate));
            
            return warnings;
        }

        /// <summary>
        /// Finds a shopping cart item in the cart
        /// </summary>
        /// <param name="shoppingCart">Shopping cart</param>
        /// <param name="shoppingCartType">Shopping cart type</param>
        /// <param name="product">Product</param>
        /// <param name="attributesXml">Attributes in XML format</param>
        /// <param name="customerEnteredPrice">Price entered by a customer</param>
        /// <param name="rentalStartDate">Rental start date</param>
        /// <param name="rentalEndDate">Rental end date</param>
        /// <returns>Found shopping cart item</returns>
        public virtual ShoppingCartItem FindShoppingCartIte