如何将可观察集合中的数据从一页移动到另一页？

Question

I want to pass the value in observable collection from page 1 to page 2. How can I pass it using a global variable?

public pg1()
{    
    InitializeComponent();
    proxy.FindOrderCompleted += new EventHandler<FindOrderCompletedEventArgs>(proxy_FindOrderCompleted);
    proxy.FindOrderAsync(custemail);
}

void proxy_FindOrderCompleted(object sender, FindOrderCompletedEventArgs e)
{
    listBox1.ItemsSource = e.Result;
    ObservableCollection<Order> Orders = this.listBox1.ItemsSource as ObservableCollection<Order>;
}

After assign it at xmal as

public ObservableCollection <Order> Orders  
{ 
    get; set; 
}

public List<Order> FindOrder(string custemail, string orderstatus)
        {
            var findorder = from r in order.Orders where (r.CustEmail  == custemail && r.OrderStatus == orderstatus ) select r;
            return findorder.ToList();
        }

How to get the assign it to global?

Answer 1

Not sure what FindOrderCompletedEventArgs are, but you should do

void proxy_FindOrderCompleted(object sender, FindOrderCompletedEventArgs e)
{
    Orders = new ObservableCollection<Order>(e.Result);
    listBox1.ItemsSource = Orders;
}