wpf - MenuItem style with icon creates only one icon

Question

Im having a problem rendering icons for a dynamic menu which uses viewmodels as an ItemsSource.
The solution I've used is outlined here MVVM Dynamic Menu UI from binding with ViewModel

The basic layout is as follows

<Grid>
  <Grid.Resources>
    <HierarchicalDataTemplate DataType="{x:Type ViewModels:HeaderedItemViewModel}"
        ItemsSource="{Binding Path=Children}">
      <ContentPresenter RecognizesAccessKey="True"></ContentPresenter>
    </HierarchicalDataTemplate>
    <Style TargetType="{x:Type MenuItem}">
      <Setter Property="Header" Value="{Binding Path=Header}" />
      <Setter Property="InputGestureText" Value="{Binding Path=InputGestureText}" />
      <Setter Property="Command" Value="{Binding Path=Command}" />
      <Setter Property="Icon">
        <Setter.Value>
          <Image Source="{Binding Path=Icon}" Height="16px" Width="16px" />
        </Setter.Value>
      </Setter>
    </Style>
  </Grid.Resources>
  <Menu Grid.Row="0" ItemsSource="{Binding Path=Shell.Navigation.Menus}" />
</Grid>

In the above style the binding 'Icon' is 'ImageSource'. This is set up as follows.

        BitmapImage image = null;

        if (!string.IsNullOrEmpty(imagePath))
        {
            image = new BitmapImage(new Uri(imagePath, UriKind.Relative));
            image.CacheOption = BitmapCacheOption.OnLoad;
            image.CreateOptions = BitmapCreateOptions.IgnoreImageCache;
        }
        var menu = new HeaderedItemViewModel
                       {
                           Header = header,
                           InputGestureText = inputGesture,
                           ImagePath = imagePath,
                           Icon = image,
                           Command = command,
                           IsEnabled = isEnabled
                       };

The problem I'm having is with the icons.
It seems only one icon will render at a time? Heres what I mean.

And opening the dropdown menu ...

As soon as another image is rendered the first one disappears? In other words only the last image is visible. This happens with all the images in the menu. Any ideas?

Answer 1

Add x:Shared=false for your Icon value. To do that you should declare Image in resources:

<Grid>
  <Grid.Resources>

   <Image x:Key="imgCTX" x:Shared="false"
         Source="{Binding Path=Icon}" Height="16px" Width="16px"/>
    <HierarchicalDataTemplate DataType="{x:Type ViewModels:HeaderedItemViewModel}"
        ItemsSource="{Binding Path=Children}">
      <ContentPresenter RecognizesAccessKey="True"></ContentPresenter>
    </HierarchicalDataTemplate>
    <Style TargetType="{x:Type MenuItem}">
      <Setter Property="Header" Value="{Binding Path=Header}" />
      <Setter Property="InputGestureText" Value="{Binding Path=InputGestureText}" />
      <Setter Property="Command" Value="{Binding Path=Command}" />
      <Setter Property="Icon" Value="{StaticResource imgCTX}" />
    </Style>
  </Grid.Resources>
  <Menu Grid.Row="0" ItemsSource="{Binding Path=Shell.Navigation.Menus}" />
</Grid>