/// <summary>
/// 商品添加购物车
/// </summary>
/// <param name="productId">商品id</param>
/// <param name="SkuId">SkuIdid</param>
/// <param name="MemberId">会员id</param>
/// <returns></returns>
public async Task <CartItemDto> AddToCartItem(Guid productId, Guid skuId, Guid memberId)
{
CartItem cartItem = await _cartItemRepository.AddToCartItem(productId, skuId, memberId);
return(ObjectMapper.Map <CartItem, CartItemDto>(cartItem));
}