Hi Andrzej,

As you pointed out, yes, it's possible to pass a parameter from dock button to the Window via the StartupParameters. The StartupParameters is defined in the WindowOptions instance that you pass along with the ApplicationURI.

Here's the code excerpt of the example that I took from our UXDesktopDock sample.

                <Intersoft:UXStackItem Text="Interestingness" Command="Intersoft:WindowCommands.LaunchApplication" CommandTarget="{Binding ElementName=SampleDesktop}">
                    <Intersoft:UXStackItem.CommandParameter>
                        <Intersoft:WindowOptions StartupParameters="Interestingness" ForceSingleInstance="True" ReactivateExistingInstance="True" Uri="/Intersoft.ClientUI.Samples.WindowControls;Intersoft.ClientUI.Samples.WindowControls.Views.UXDesktopDock.Photos"/>
                    </Intersoft:UXStackItem.CommandParameter>
                </Intersoft:UXStackItem>

Of course, in your case, you can define the CommandParameter for your specific object such as UXDesktopDockButton, instead of UXStackItem.

If you need to pass a dynamic parameter, feel free to bind the StartupParameters to the object that contains the value you want to transfer. I.e., StartupParameters="{Binding ViewModel.DynamicValue}"

When you pass the WindowOptions that contains StartupParameters to the target application, and assuming the target is an IWindow, you can obtain the value of the parameters in the window.StartupParameters in the Load event of the window. With this technique, you can elegantly pass the parameters without intermediate/proxy code.

For an example, the following code obtains the parameter sent from the UXStackItem in the previous code example.

private void Photos_Loaded(object sender, RoutedEventArgs e)
        {
            FlickrPhotosViewModel model = new FlickrPhotosViewModel();
            this.DataContext = model;

            if (this.StartupParameters == null)
                model.GetPhotosCommand.Execute("Interestingness");
            else
                model.GetPhotosCommand.Execute(this.StartupParameters.ToString());
        }

Let me know if it works in your end, or if you have other questions.

Hope this helps,
Jimmy

Hi Jimmy,

Thank you for your accurate observations.

I'll study your examples more carefully.

Kind regards

Andrzej