Lukas,
I think the problem is the RunWorkerCompleted handler trying to update the
UI. Wrap calls from a background thread to update UI controls in something
like this so the Dispatcher updates any controls on the UI thread:
this.Dispatcher.BeginInvoke(() =>
{
this.textBlock1.Text = "IronPython loaded";
});
Hope that helps.
-Dave
2010/8/17 Lukas Cenovsky <cenov...@bakalari.cz>
> Hi all,
> is it possible to load IronPython engine in the background thread in
> Silverlight?
>
> I tried to load it via BackgroundWorker:
>
> private void UserControl_Loaded(object sender, RoutedEventArgs ev)
> {
> IPloader = new BackgroundWorker();
> IPloader.DoWork += new DoWorkEventHandler((s, e) =>
> {
> runtime = DynamicEngine.CreateRuntime(true); // debug mode true
> engine = runtime.GetEngine("python");
> }
> );
> IPloader.RunWorkerCompleted += new RunWorkerCompletedEventHandler((s, e)
> =>
> {
> this.textBlock1.Text = "IronPython loaded";
> }
> );
> IPloader.RunWorkerAsync();
> }
>
> It fails with the following exception:
>
> System.UnauthorizedAccessException was unhandled by user code
> Message=Invalid cross-thread access.
> StackTrace:
> at MS.Internal.XcpImports.CheckThread()
> at
> System.Windows.DependencyObject.GetValueInternal(DependencyProperty dp)
> at System.Windows.Deployment.get_Parts()
> at Microsoft.Scripting.Silverlight.DynamicAppManifest.AssemblyParts()
> at Microsoft.Scripting.Silverlight.DynamicAppManifest..ctor()
> at Microsoft.Scripting.Silverlight.DynamicEngine.CreateLangConfig()
> at
> Microsoft.Scripting.Silverlight.DynamicEngine.CreateRuntimeSetup(Boolean
> debugMode)
> at
> Microsoft.Scripting.Silverlight.DynamicEngine.CreateRuntime(Boolean
> debugMode)
> at SLHosting.MainPage.<UserControl_Loaded>b__0(Object s,
> DoWorkEventArgs e)
> at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
> at System.ComponentModel.BackgroundWorker.OnRun(Object argument)
> InnerException:
>
> Thanks for any advice.
>
> --
> -- Lukáš
>
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