public ActionResult SetCartQuantity(Cart cart)
{
ResultInfo resultInfo = new ResultInfo(1, "传递的参数有误");
if (ModelState.IsValid)
{
//User user = new User();
//user.UserId = 1;
//user.GuestId = "";
cart.UserId = 1;
cart.GuestId = "";
resultInfo = _cartService.SetCartQuantity(cart);
}
return Json(resultInfo);
}
public void DeleteCart(User user, Cart cart)
{
_cartRepository.Delete(cart);
}
/// <summary>
/// 添加或修改购物车项
/// </summary>
/// <param name="user"></param>
/// <param name="cart"></param>
/// <returns></returns>
public ResultInfo SetCartQuantity(Cart cart)
{
//保证UserId或GuestId至少有个值
if (cart.UserId == 0 && cart.GuestId == "")
{
return new ResultInfo("无效用户");
}
var skuQuery = from s in _skuRepository.Table
where s.Attr == cart.Attr && s.ProductId == cart.ProductId
select s;
var sku = skuQuery.FirstOrDefault();
if (sku == null)
{
return new ResultInfo("该商品已下架或者库存不足");
}
cart.SkuId = sku.SkuId;
cart.PhotoId = sku.PhotoId;
var cartQuery = from c in _cartRepository.Table
where c.SkuId==cart.SkuId && c.ProductId==cart.ProductId && c.UserId==cart.UserId && c.GuestId==cart.GuestId
select c;
var oldCart = cartQuery.FirstOrDefault();
if (oldCart == null)
{
if (cart.Quantity > sku.Quantity)
{
cart.Quantity = sku.Quantity;
}
_cartRepository.Add(cart);
}
else
{
oldCart.Quantity += cart.Quantity;
if (cart.Quantity > sku.Quantity)
{
cart.Quantity = sku.Quantity;
}
_cartRepository.Update(oldCart);
}
return new ResultInfo("添加成功");
}
