I am trying to open a new window once a workflow is completed. I am using the following code:

public void InizializeFlickrPhotosGetSizesWorkflow(string photoId, string title, ImageSource image, string description, string tags)
{
parameters = new Dictionary<string, object>();
parameters.Add("PhotoId", photoId);
try
{
if ((this.workflowRuntime = new WorkflowRuntime()) == null)
{
throw new System.Exception("There was a problem creating the workflow runtime.\nThe Application will now exit.");
}
else
{
// Add the External Data Exchange Service
ExternalDataExchangeService dataService =
new ExternalDataExchangeService();
// Add dataService to the workflow runtime
this.workflowRuntime.AddService(dataService);
//Add GetLiveSearchKey to the dataService
dataService.AddService(new FlickrAPI.FlickrKeys());
}
}
catch (System.Exception ex)
{
System.Windows.MessageBox.Show(ex.Message.ToString());
}
this.instance = workflowRuntime.CreateWorkflow(typeof(FlickrActivityLibrary.FlickrPhotosGetSizes), parameters);

this.workflowRuntime.WorkflowCompleted += delegate(object s, WorkflowCompletedEventArgs ex)
{
Thread newWindowThread = new Thread(delegate()
{
previewPhotoWindow=new PhotoView(int.Parse((ex.OutputParameters["LargeHeight"] as String)), int.Parse((ex.OutputParameters["LargeWidth"] as String)), title, image, description, tags);
previewPhotoWindow.Show();
}
);
newWindowThread.SetApartmentState(ApartmentState.STA);
newWindowThread.Start();
parameters.Clear();
waitHandle.Set();
};

workflowRuntime.WorkflowTerminated += delegate(object s, WorkflowTerminatedEventArgs ex)
{
System.Windows.MessageBox.Show("WorkflowTerminated");
Console.WriteLine(ex.Exception.Message);
parameters.Clear();
waitHandle.Set();
};
}

Once the new window should be shown (the line in bold), I get the following error:

LoaderLock was detected
Message: Attempting managed execution inside OS Loader lock. Do not attempt to run managed code inside a DllMain or image initialization function since doing so can cause the application to hang.

Any ideas why I get this error message? Any help is welcome...

Hi;

I thought it was a threading problem so I went through writting similar code as the one you have. As you may know each workflow instance is running on a separate thread. However, I got nothing and no exceptions.

I think the problem you have is having exception in the first line where you create the new window and passing some data to the newly created window.

I solved the problem with opening a new window using dipatcher:

OpenWindowDelegate openWindowDelegate = new OpenWindowDelegate(this.OpenWindow);

this.Dispatcher.BeginInvoke(System.Windows.Threading.DispatcherPriority.Normal, openWindowDelegate, previewPhotoWindow, int.Parse((ex.OutputParameters["LargeHeight"] as String)), int.Parse((ex.OutputParameters["LargeWidth"] as String)), title, image, description, tags);

And there was one more problem as well,.... loading image into WPF image object which I also had to update using dispatcher.... The problem is that I don't understan why the above code worked and trying to open a new window without a dispatcher resulted in a loaderLock?