WPF MVVM Light enabling button if data grid row is selected

Question

I can't seem to find a straight answer on this anywhere. I have a button that I want to Disable UNTIL a DataGrid row is selected. Doesn't matter which row. Once it's deselected I would like it to be disabled again.

Answer 1

It's much easier to just use the automatic evaluation of int to bool provided by WPF:

IsEnabled="{Binding ElementName=YourDataGrid, Path=SelectedItems.Count}"