Question

I’m just starting out with the Caliburn Micro WindowManager.

I have managed to display a modal dialog containing my WPF view.

I need to return an object from the dialog. What is the best way to do this?

Background – this is a login dialog. I need to validate the username and password and return user configuration information.

Answer 1

There are two ways I can think of to do this. I’m assuming your Login viewmodel class derives from Caliburn.Micro.Screen.

1) Have the view model (representing your login screen) expose a property that returns the user configuration. You can then access it upon a successful login like below:

var windowManager = new WindowManager();
var login = new MyLoginViewModel();
if (windowManager.ShowDialog(login) == true)
{
    var configurationInfo = login.MyUserConfigurationInfo;
}

2) Add the user configuration information to the application’s resource dictionary upon a successful login. The example below shows you setting this inside a “Login” method inside the login viewmodel.

void Login()
{
    /* Authentication Logic success */
    App.Current.Resources["UserConfigurationInfo"] = new UserConfigurationInfo();
    TryClose(true);
}