How would I resolve thread owning issue in OnBarUpdate?

[tonystarks]

I'm newer to the UI things and would like the buttons to change color based on a trade direction, but I'm stuck on a thread issue where it cannot access the buttonsArray because a different thread owns it. I tried CurrentDispatcher.Invoke without any success. Any other ideas to get this to work?

        protected override void OnBarUpdate()
        {
            if (buttonsArray == null)
                return;

            if (Global.SelectedTradeDirection == Global.Direction.LONG)
            {
                System.Windows.Threading.Dispatcher.CurrentDispatcher.Invoke(() =>
                {
                    buttonsArray[SHORT_BUTTON].Background = new SolidColorBrush(Colors.Transparent);
                });

                ForceRefresh();
            }
            else if (Global.SelectedTradeDirection == Global.Direction.SHORT)
            {
                System.Windows.Threading.Dispatcher.CurrentDispatcher.Invoke(() =>
                {
                    buttonsArray[LONG_BUTTON].Background = new SolidColorBrush(Colors.Transparent);
                });

                ForceRefresh();
            }
            else
            {
                System.Windows.Threading.Dispatcher.CurrentDispatcher.Invoke(() =>
                {
                    buttonsArray[LONG_BUTTON].Background = new SolidColorBrush(Colors.Transparent);
                    buttonsArray[SHORT_BUTTON].Background = new SolidColorBrush(Colors.Transparent);
                });

                ForceRefresh();
            }
        }​

[tonystarks]

I resolved it.

protected override void OnBarUpdate()
        {
            if (buttonsArray == null)
                return;

            if (buttonsArray[LONG_BUTTON] == null || buttonsArray[SHORT_BUTTON] == null)
                return;

            if (Global.SelectedTradeDirection == Global.Direction.LONG)
            {
                if (buttonsArray[SHORT_BUTTON].Dispatcher.CheckAccess())
                {
                    ResetShortButton();
                }
                else
                {
                    this.Dispatcher.InvokeAsync(new Action(() =>
                    {
                        ResetShortButton();
                    }));
                }

                ForceRefresh();
            }
            else if (Global.SelectedTradeDirection == Global.Direction.SHORT)
            {
                if (buttonsArray[LONG_BUTTON].Dispatcher.CheckAccess())
                {
                    ResetLongButton();
                }
                else
                {
                    this.Dispatcher.InvokeAsync(new Action(() =>
                    {
                        ResetLongButton();
                    }));
                }

                ForceRefresh();
            }
            else
            {
                if (buttonsArray[SHORT_BUTTON].Dispatcher.CheckAccess())
                {
                    ResetLongButton();
                    ResetShortButton();
                }
                else
                {
                    this.Dispatcher.InvokeAsync(new Action(() =>
                    {
                        ResetLongButton();
                    }));

                    this.Dispatcher.InvokeAsync(new Action(() =>
                    {
                        ResetShortButton();
                    }));
                }

                ForceRefresh();
            }
        }​