WPF Parameters through Unity Dependency Injection

Question

I'm instantiating a View throught the Unity, and this View has a ViewModel as parameter. However, this ViewModel has three other parameters, which two of them are already configureted on Unity, and the last parameter I need to get from the MainView that open the SecondView. (Crazy, hm?)

This method is called from my MainView (first view) when a button is clicked:

private void ShowAddVersionViewExecute()
{
    Window view = UnityServiceConfigurator.Instance.GetUnityContainer().Resolve<AddVersionView>() as Window;
    view.ShowDialog();
}

This is my AddVersionView (second view), which has its ViewModel as parameter.

public partial class AddVersionView
{
    public AddVersionView(AddVersionViewModel viewModel)
    {
        //InicializeComponents and set the viewModel to DataContext.
    }
}

This is the AddVersionViewModel's constructor

public AddVersionViewModel(IDialogService dialog, AbstractRepository repository, string versionNumber)
{
    //Some code here.
}

The IDialogService and AbstractRepository are resolved by Unity. BUT I want receive the "versionNumber" from the MainView.

How/What am I supposed to do it?
Is there any other way to perform that?

Thanks a lot.

fsimonazzi · Accepted Answer · 2012-12-05 19:06:06Z

2

You can use parameter overrides to supply parameters at resolve time. There are several examples available at http://msdn.microsoft.com/en-us/library/ff660920(v=pandp.20).aspx.

answered Dec 5, 2012 at 19:06

fsimonazzi

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1 Comment

Guilherme Oliveira Over a year ago

Thank you. I tried with ParameterOverride and it worked as I wanted.

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