Which State Change should a bitmapImage be instantiated?

[Mindset]

HI
I have a toolbar button that works fine.
However when I add an Image it inconsistently doubles up ie 2 buttons

here is my code

the image is currently set in ONHistorical, but I have also tried on data loaded and get the same issue.
ps this code is from the help guide as well so I really am mystified.
Can anyone assist?

            else if (State == State.Historical)
            {
                         if(ChartControl != null)
                         {
                    ChartControl.Dispatcher.InvokeAsync((Action)(() =>
                    {


          myBitmapImage.BeginInit();
          myBitmapImage.UriSource = new Uri(NinjaTrader.Core.Globals.InstallDir + "switch21.png");
myBitmapImage.Rotation = Rotation.Rotate270;                        
                        myBitmapImage.EndInit();

          // Assign the BitmapImage as the ImageSource of the ImageBrush
          backgroundImage.ImageSource = myBitmapImage;    
                        //myBitmapImage.
            }));        


                         }

                          if (!IsToolBarButtonAdded)
                  AddButtonToToolbar();    
            }​

[NinjaTrader_Jesse]

Hello Mindset,

There are a few samples in the help guide that show how to define a BitmapImage, you can search in the helpguide for BitmapImage to see them all. Here is the first sample:

https://ninjatrader.com/support/helpGuides/nt8/using_images_and_geometry_with_custom_icons.htm

[QuantKey_Bruce]

You shouldn't just add it and set a flag - you should check the toolbar and see if it's already there before you add it. Problem solved.

[Mindset]

Ah of course. Thanks QuantKey_Bruce.