Implementing “close window” command with MVVM

Question

So my first attempt did everything out of the code behind, and now I\'m trying to refactor my code to use the MVVM pattern, following the guidance of the MVVM in the box inf

Answer 1

This is taken from ken2k answer (thanks!), just adding the CloseCommand also to the base CloseableViewModel.

public class CloseableViewModel
{
    public CloseableViewModel()
    {
        CloseCommand = new RelayCommand(this.OnClosingRequest);
    }

    public event EventHandler ClosingRequest;

    protected void OnClosingRequest()
    {
        if (this.ClosingRequest != null)
        {
            this.ClosingRequest(this, EventArgs.Empty);
        }
    }

    public RelayCommand CloseCommand
    {
        get;
        private set;
    }
}

Your view model, inherits it

public class MyViewModel : CloseableViewModel

Then on you view

public MyView()
{
    var viewModel = new StudyDataStructureViewModel(studyId);
    this.DataContext = viewModel;

    //InitializeComponent(); ...

    viewModel.ClosingRequest += (sender, e) => this.Close();
}