I have the following XAML which I got from samples:
<StackPanel>
<StackPanel.Resources>
<DataTemplate DataType="Hero">
<TextBlock Text="{Binding XPath=@Name}" Foreground="Cyan"/>
</DataTemplate>
<XmlDataProvider x:Key="GreekHeroesData" XPath="GreekHeroes/Hero">
<x:XData>
<GreekHeroes xmlns="">
<Hero Name="Jason" />
<Hero Name="Hercules" />
<Hero Name="Perseus" />
</GreekHeroes>
</x:XData>
</XmlDataProvider>
</StackPanel.Resources>
<TextBlock FontSize="18" FontWeight="Bold" Margin="10"
HorizontalAlignment="Center">Composite Collections Sample</TextBlock>
<ListBox Name="lbGodsAndHeroes" Height="300" Width="200" Background="White"
ListBox.ItemsSource="{Binding Source={StaticResource GreekHeroesData}}"/>
</StackPanel>
It works fine, If I run it as XAML Windows Application, i.e. I'm able to see list box items (in this case I put it into <Window>).
If I read it using XamlReader and render to image by RenderTargetBitmap then ListBox items will not appear on the image (data binding doesn't work).
By analogy with ASP.NET I thought that it should be something like DataBind() function. I tryed to use BindingExpression.UpdateSource() - but this doesn't help.
What could be a problem How to force data binding in WPF
Regards, Andrey
XamlReader + StaticResource data binding + RenderTargetBitmap problem
frank stone
DataBinding does not happy synchronously.
Thread.Sleep(3000) won’t help (on the UI thread).
You should cue up a dummy method using Dispatcher.Invoke with a low priority (use Background). In this dummy method, try to access the image.
Mika Joronen
Found walkaround:
Adding IsAsynchronous
="False" to <XmlDataProvider> solves the issue.Still having issues when IsAsynchronous="True". Thread.Sleep(30000) after XamlReader didn't help.
Any Ideas