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copied!<p>Create a common interface/class known to both module, called IChildWindowService, register the IChildWindowServe/ChildWindowService in the bootstrapper.</p> <pre><code>//Highly simplified version //Can be improved by window reuse, parameter options, stronger eventing public class ChildWindowService : IChildWindowService { public ChildWindowService(IServiceLocator container) { _container = container; } public void Show<TViewModel>(TViewModel viewModel = null, Action<TViewModel, bool?> callBack = null) where TViewModel is IViewModel { var viewName = typeof(TViewModel).Name.Replace("Model", string.Empty); // In bootstrapper register all instances of IView or register each view one by one var view = _container.GetInstance<IView>(viewName); viewModel = viewModel ?? _container.GetInstance<TViewModel>(); view.DataContext = viewModel; var window = new ChildWindow(); window.Content = view; var handler = (s,e) => { window.Close(); } viewModel.RequestClose += handler; view.Closed += (s,e) => { viewModel.RequestClose -= handler; } // In silverlight all windows show as Modal, if you are using a third party you can make a decision here window.Show(); } } </code></pre> <p>Create a common CompositePresentationEvent, this event will pass the parameters from point a to point b </p> <p><code>public class OpenChildWindowWithParameters : CompositePresentationEvent<ParamEventArgs>{}</code></p> <p>The ViewModel in Module A raises the Event. The Controller in Module B registers and reacts to the Event. The Controller in Module B takes the child window service as a dependency. When the event is raised the Controller will create the VM in Module B and pass the parameters to it, from the event, it will also use the Service to display a ChildWindow.</p>

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