/// <summary>
/// Called when the navigation has completed.
/// </summary>
/// <remarks>
/// This should of course be a cleaner solution, but there is no other way to let a view-model
/// know that navigation has completed. Another option is injection, but this would require every
/// view-model for Windows Phone 7 to accept only the navigation context, which has actually nothing
/// to do with the logic.
/// <para/>
/// It is also possible to use the <see cref="NavigationCompleted"/> event.
/// </remarks>
protected override void OnNavigationCompleted()
{
if (NavigationContext.Values.ContainsKey("ShoppingListIndex"))
{
int.TryParse((string)NavigationContext.Values["ShoppingListIndex"], out _shoppingListIndex);
}
if (_shoppingListIndex == -1)
{
ShoppingList = new Data.ShoppingList();
UserData.Instance.ShoppingLists.Add(ShoppingList);
_shoppingListIndex = UserData.Instance.ShoppingLists.IndexOf(ShoppingList);
}
else
{
ShoppingList = UserData.Instance.ShoppingLists[_shoppingListIndex];
}
}
/// <summary>
/// Called when the navigation has completed.
/// </summary>
/// <remarks>
/// This should of course be a cleaner solution, but there is no other way to let a view-model
/// know that navigation has completed. Another option is injection, but this would require every
/// view-model for Windows Phone 7 to accept only the navigation context, which has actually nothing
/// to do with the logic.
/// <para/>
/// It is also possible to use the <see cref="NavigationCompleted"/> event.
/// </remarks>
protected override void OnNavigationCompleted()
{
if (NavigationContext.Values.ContainsKey("ShoppingListIndex"))
{
int.TryParse((string)NavigationContext.Values["ShoppingListIndex"], out _shoppingListIndex);
}
if (_shoppingListIndex == -1)
{
ShoppingList = new Data.ShoppingList();
UserData.Instance.ShoppingLists.Add(ShoppingList);
_shoppingListIndex = UserData.Instance.ShoppingLists.IndexOf(ShoppingList);
}
else
{
ShoppingList = UserData.Instance.ShoppingLists[_shoppingListIndex];
}
}