protected void AddToCartButton_Click(object sender, EventArgs e)
{
using (ToyStoreEntities context = new ToyStoreEntities())
{
String CurrentUserName = ((Site1)Page.Master).CurrentUserName;
Cart myCart;
//找到该用户的购物车
var query = from p in context.Carts
where p.UserName == CurrentUserName
select p;
if (query.Count() == 0)
{
myCart = new Cart();
myCart.UserName = CurrentUserName;
context.AddToCarts(myCart);
}
else
{
myCart = query.First();
}
//查找是否已有该购物车明细
var query1 = from p in myCart.CartDetails
where p.Product.Id == CurrentProduct.Id
select p;
CartDetail myCartDetail;
if (query1.Count() == 0)
{
//如果没有，新增
myCartDetail = new CartDetail();
myCartDetail.Cart = myCart;
myCartDetail.ProductId = CurrentProduct.Id;
myCartDetail.OTY = 1;
}
else
{
//如果有，修改数量
myCartDetail = query1.First();
myCartDetail.OTY += 1;
}
context.SaveChanges();
}
}
/// <summary>
/// Create a new Cart object.
/// </summary>
/// <param name="id">Initial value of the Id property.</param>
/// <param name="userName">Initial value of the UserName property.</param>
public static Cart CreateCart(global::System.Int32 id, global::System.String userName)
{
Cart cart = new Cart();
cart.Id = id;
cart.UserName = userName;
return cart;
}
/// <summary>
/// Deprecated Method for adding a new object to the Carts EntitySet. Consider using the .Add method of the associated ObjectSet<T> property instead.
/// </summary>
public void AddToCarts(Cart cart)
{
base.AddObject("Carts", cart);
}