How to bind inverse boolean properties in WPF?

Question

What I have is an object that has an `IsReadOnly` property. If this property is true, I would like to set the `IsEnabled` property on a Button, ( for example ), to false. I would like to believe that I can do it as easily as `IsEnabled="{Binding Path=!IsReadOnly}"` but that doesn't fly with WPF. Am I relegated to having to go through all of the style settings? Just seems too wordy for something as simple as setting one bool to the inverse of another bool. ``` ```

Accepted Answer

You can use a ValueConverter that inverts a bool property for you.

XAML:

```
IsEnabled="{Binding Path=IsReadOnly, Converter={StaticResource InverseBooleanConverter}}"
```

Converter:

```
[ValueConversion(typeof(bool), typeof(bool))]
    public class InverseBooleanConverter: IValueConverter
    {
        #region IValueConverter Members

public object Convert(object value, Type targetType, object parameter,
            System.Globalization.CultureInfo culture)
        {
            if (targetType != typeof(bool))
                throw new InvalidOperationException("The target must be a boolean");

return !(bool)value;
        }

public object ConvertBack(object value, Type targetType, object parameter,
            System.Globalization.CultureInfo culture)
        {
            throw new NotSupportedException();
        }

#endregion
    }
```

How to bind inverse boolean properties in WPF?

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