ApplicationBarIconButton not displaying

问题

This question was migrated from Windows Phone Stack Exchange because it can be answered on Stack Overflow. Migrated 5 years ago.

I create images from online at picresize.com to use as application bar icons. I made them 48 x 48. The only thing I didn't do was make the background transparent. Now the icons just show as white blocks and nothing else. This page, http://msdn.microsoft.com/en-us/library/windowsphone/develop/ff431806(v=vs.105).aspx, specifies what should be done but doesn't say a must. Any thoughts or experiences in this happening to others?

appBarButton =
                new ApplicationBarIconButton(new Uri("/Assets/AppBar/<my_button>.png", UriKind.Relative));
            appBarButton.Text = "<text>";
            appBarButton.Click += appBarButton_Click;

            ApplicationBar.Buttons.Add(appBarButton);

回答1:

The transparent background is a must.

Instead of using that picresize.com web service, you should probably learn to use Photoshop, Paint.Net, or any other descent image editor that works on your computer not on someone else's computer.

来源：https://stackoverflow.com/questions/22945468/applicationbariconbutton-not-displaying