async void AddItem_Clicked(object sender, System.EventArgs e)
{
var itemDetaiLView = new ItemDetailView(new GroceryItem());
itemDetaiLView.ListExistingItems = Items.ToList();
itemDetaiLView.ItemAdded += AddItem;
await Navigation.PushModalAsync(itemDetaiLView);
}
async void OnEditItem(object sender, System.EventArgs e)
{
var menuItem = sender as MenuItem;
var itemToUpdate = menuItem.CommandParameter as ItemDetail;
if (itemToUpdate != null)
{
var itemDetaiLView = new ItemDetailView(itemToUpdate.GroceryItem);
itemDetaiLView.IsEditing = true;
itemDetaiLView.ItemUpdated += UpdateItem;
await Navigation.PushModalAsync(itemDetaiLView);
//Deselect Item
itemListView.SelectedItem = null;
}
}