Cannot change Fluent.Button Icon Dynamically

[andirinli]

var btn = BoxPccStatus.Children.OfType<Fluent.Button>().FirstOrDefault(f => (int)f.Tag == pcc.PccNum);

                switch (pcc.PccState)
                {
                    case PccStates.DISCONNECTED:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOffUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOffUri);
                        break;
                    case PccStates.CONNECTED:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;
                    case PccStates.IDLE:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;
                    case PccStates.READY:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;
                    case PccStates.PRINTING:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;
                    case PccStates.INITIALIZING:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;
                    case PccStates.STARTUP:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;
                    case PccStates.FAULT:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOffUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOffUri);
                        break;
                    case PccStates.LOADING:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;
                    default:
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOffUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOffUri);
                        break;
                }

Button Icon is not change why???

[batzen]

As I don't have all your code I would guess that your button is not found by the tag you search for.
Or do you really hit one of those icon assignment lines?

[andirinli]

as you can see btn founded
if i use same commands in usercontrol loaded event its working. but if i try in another event its not working (for example another button click event)
and also i try change font size and forecolor from another event its work, but btn.background is not work.

[batzen]

That's strange.
Could you try to set btn.Icon = null and btn.LargeIcon = null before you assign your values?
That's not meant to be a permanent fix, but I just want to exclude some potential factors.

[andirinli]

Yes i try.
i creating buttons on usercontrol loaded.
when pcc state chance event triggered; i can change font size, forecolor, header ,etc..
except Background,Icon,LargeIcon

[batzen]

I think you misunderstood what I want you to try.
Could you modify one of your case blocks to

case PccStates.IDLE:
                        btn.Icon = null;
                        btn.LargeIcon = null;
                        btn.Icon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        btn.LargeIcon = new BitmapImage(Engine.EngineResources.PccOnUri);
                        break;

And tell me if the icon changes.
If that does not work it would be nice if you could provide a repro for your issue. By repro I mean a small sample application which reproduces your issue.

Background is not bound in the style so changing it has no effect. The original developers of this library never took that into account and I never needed it to be changeable.

[andirinli]

i uploaded sample app.
https://drive.google.com/file/d/0B2pUdqDGN9EWUWRuME9ZSmt5UUE/view?usp=sharing

[batzen]

Ok, i can reproduce it.
But i don't know why it fails to show the images...
Essentially the ObjectToImageConverter, working in the background, just does

var image = new Image
{
    Source = yourBitmapImage
};

If you remove the assignment of btn.Icon and just leave btn.LargeIcon it works, but only for one button...

Everything works fine when you change your code to:

btn.Icon = Engine.EngineResources.PccOnUri;
btn.LargeIcon = Engine.EngineResources.PccOnUri;

Please don't ask me why using "new BitmapImage" for the same Uri causes such an issue.
For me it smells like a WPF issue...

[batzen]

Ok, it seems like there is some caching going on in WPF internally.
If I change the converter to get a frozen instance of the BitmapImage it works.