I know this is an old post, probably no one would scroll this far, I know I didn't. So, after hours of trying different stuff, I found this blog and dude killed it. Simplest way to do this, tried it and it works like a charm.
In the ViewModel:
...
public bool CanClose { get; set; }
private RelayCommand closeCommand;
public ICommand CloseCommand
{
get
{
if(closeCommand == null)
(
closeCommand = new RelayCommand(param => Close(), param => CanClose);
)
}
}
public void Close()
{
this.Close();
}
...
add an Action property to the ViewModel, but define it from the View’s code-behind file. This will let us dynamically define a reference on the ViewModel that points to the View.
On the ViewModel, we’ll simply add:
public Action CloseAction { get; set; }
And on the View, we’ll define it as such:
public View()
{
InitializeComponent() // this draws the View
ViewModel vm = new ViewModel(); // this creates an instance of the ViewModel
this.DataContext = vm; // this sets the newly created ViewModel as the DataContext for the View
if ( vm.CloseAction == null )
vm.CloseAction = new Action(() => this.Close());
}