BillKrat

 In the following message Application.Resources availability during Bootstrapping srccoder has an issue programmatically accessing the resource dictionary from the application and/or shell constructor.  I provided the following response and example of how it can (and does) work.

Can you provide an example of what is not working?  I'll provide an example of what does :)   Using the CompositeWPF Commanding solution...

I added the following to the Styles/Styles.xaml

  <Style x:Key="MyLabel" TargetType="{x:Type Label}">
        <Setter Property="HorizontalContentAlignment" Value="Center"/>
        <Setter Property="VerticalContentAlignment" Value="Center"/>
    </Style>

The App.xaml file looks as follows (in its entirety)

<Application x:Class="Commanding.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Styles\styles.xaml"></ResourceDictionary>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </Application.Resources>
</Application>

App.xaml.cs - code behind

    public partial class App : Application
    {
        public App()
        {
            InitializeComponent();  // <== Must execute before FindResource in main app

            Style myLabelStyle = FindResource("MyLabel") as Style;
            if (myLabelStyle == null)
                throw new Exception("MyLabel style not found");

        }
         ....
    }

Shell.xaml.cs - code behind

        public Shell()
        {
            Style myLabelStyle = FindResource("MyLabel") as Style;
            if (myLabelStyle == null)
                throw new Exception("MyLabel style not found");

            InitializeComponent();  
        }

Everything runs without error.   I added the following label to the bottom of the Shell.xaml file:

        <Label HorizontalAlignment="Right" Content="Hello" Style="{DynamicResource MyLabel}" Width="87" />
        <Separator Margin="0,0,0,0" VerticalAlignment="Bottom" Height="10" BorderBrush="#193441"/>
    </Grid>
</Window>

It works just fine whether I use StaticResource or DynamicResource.

Tags: compositewpf, resourcedictionary, styles
Categories: CompositeWPF