C# 删除项目GridView Windows 8 Metro

我试图从GridView控件中删除项。单击“删除”时，GridView无法更新

我已将GridView与可观察集合中的订单列表绑定。这是我的订单类：

public class Order : INotifyPropertyChanged
{
    public Order() { }
    private int _id;
    [PrimaryKey, AutoIncrement]
    public int Id
    {
        get { return _id; }
        set
        {

            this._id = value;
            Notify("ID");
        }
    }
    public int RestaurantID { get; set;}
    public DateTime Date { get; set; }
    public string Note { get; set; }
    public decimal TotalPrice { get; set; }
    [Ignore]
    public List<OrderDetail> OrderDetails { get; set; }

    #region INotifyPropertyChanged Members

    [Ignore]
    public event PropertyChangedEventHandler PropertyChanged;

    [Ignore]
    protected void Notify(string propName)
    {
        if (this.PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propName));
        }
    }
    #endregion
}

---

代码似乎只是从存储库中删除了该项。您还需要将其从

ObservableCollection

中删除。尝试在

存储库下添加此项。删除订单（order.Id）

：

 ObservableCollection<Order> orderCollection = new ObservableCollection<Order>();
            foreach (Order ord in orders)
            {
                orderCollection.Add(ord);
            }

            this.DefaultViewModel["Items"] = orderCollection;

    private void btnDelete_Click_1(object sender, RoutedEventArgs e)
    {
        Button btnDelete = (Button)sender;
        Order order = btnDelete.DataContext as Order;
        repository.DeleteOrder(order.Id);
    }

orderCollection.Remove(order);