private async void AddItem_Clicked(object sender, EventArgs e)
{
var edPage = new EditOrCreateProductPage(0);
edPage.Changed += EdPage_Changed;
await Navigation.PushAsync(edPage);
}
private async void ProductList_ItemTapped(object sender, ItemTappedEventArgs e)
{
(sender as ListView).SelectedItem = null;
var id = (e.Item as ProductView).Id;
var edPage = new EditOrCreateProductPage(id);
edPage.Changed += EdPage_Changed;
await Navigation.PushAsync(edPage);
}
