XAML: Toggleswitch reset state

Question

I want to perform the following. I have a ToggleSwitch whichs Toggled event handler performs some action. If this action fails I want to reset the ToggleSwitch's state to what it was.

I achieve this by doing: toggleSwitch.IsOn = !toggleSwitch.IsOn;

My problem is that this again raises the Toggled event resulting in an infinit loop if the action always fails.

Here is my complete code sample

    private async void ToggleSwitch_Toggled(object sender, Windows.UI.Xaml.RoutedEventArgs e)
    {
        ToggleSwitch toggleSwitch = sender as ToggleSwitch;
        success = dummyService.performAction(toggleSwitch.IsOn); 
        if (!success )
        {
            //raise dialog to inform user here
            toggleSwitch.IsOn = !toggleSwitch.IsOn;
        }
    }

I know that this behavior is already implemented in different apps so it can't be too hard to achieve this.

Answer 1

You can do something like this detaching and reattaching your event:

if (!success )
{
    toggleSwitch.Toggled -= ToggleSwitch_Toggled;
    try
    {
      toggleSwitch.IsOn = !toggleSwitch.IsOn;
    }
    finally
    {
      toggleSwitch.Toggled += ToggleSwitch_Toggled;
    }
}