WPF IsEnabled Grid

Question

I want to get my grid disabled when my property is Null and enabled when is Not null.

In my .XAML :

  <Grid Grid.Row="2" IsEnabled="{Binding ElementName=dgCustomers, Path=SelectedItem}">
      <my:ProductsHistoryDetailView />
  </Grid>

In my ViewModel.cs :

    public ProductHistory SelectedItem
    {
        get { return _SelectedItem; }
        set
        {
            if (_SelectedItem != value)
            {
                _SelectedItem = value;
                RaisePropertyChanged(() => SelectedItem);
            }
        }
    }

Answer 1

You should add an extra property to your viewmodel.

    public bool IsGridEnabled
    {
        get 
          { 
             return this.SelectedItem != null;
          }
    }

<Grid Grid.Row="2" IsEnabled="{Binding IsGridEnabled}">
     <my:ProductsHistoryDetailView />
</Grid>

And when your SelectedItem changes, call the OnPropertyChanged event for IsGridEnabled:

public ProductHistory SelectedItem
{
    get { return _SelectedItem; }
    set
    {
        if (_SelectedItem != value)
        {
            _SelectedItem = value;
            RaisePropertyChanged(() => SelectedItem);
            RaisePropertyChanged(() => IsGridEnabled);
        }
    }
}