我有两种模式:
public class Customer : People
{
public int CustomerID { get; set; }
public decimal? Weight { get; set; }
public decimal? Height { get; set; }
public ICollection<Purchase> Cart { get; set; }
}
和
public class Purchase
{
public int PurchaseID { get; set; }
public DateTime Time { get; set; }
public decimal TotalPrice { get; set; }
public int Amount { get; set; }
public Good Good { get; set; }
}
我已经有了一个客户,需要更新他的购物车(例如为其添加smth)。
我试图像这样做,但这什么都不做。我做错了什么?
Customer customer = new Customer()
{
CustomerID = currentID.Value
};
var cart = new List<Purchase>();
cart.Add(new Purchase()
{
Amount = 1,
Good = good,
Time = DateTime.Now,
TotalPrice = good.Price
});
customer.Cart = cart;
var entry = _context.Entry(customer);
_context.Update(customer);
_context.SaveChanges();
更新:
我试图做一些建议的事情,但是......我生活中无法理解的是什么? Context when i try to update与Context when i try to view updated Customer
答案 0 :(得分:0)
当您尝试更新实体时。所以这就是我的追随和运作方式。
context.Entry(customer).State = System.Data.EntityState.Modified;
context.ChangeTracker.DetectChanges();
context.SaveChanges();