Question

I’ve got an enum like this:

public enum MyLovelyEnum {     FirstSelection,     TheOtherSelection,     YetAnotherOne }; 

I got a property in my DataContext:

public MyLovelyEnum VeryLovelyEnum { get; set; } 

And I got three RadioButtons in my WPF client.

<RadioButton Margin='3'>First Selection</RadioButton> <RadioButton Margin='3'>The Other Selection</RadioButton> <RadioButton Margin='3'>Yet Another one</RadioButton> 

Now how do I bind the RadioButtons to the property for a proper two-way binding?

Answer 1

You could use a more generic converter

public class EnumBooleanConverter : IValueConverter {   #region IValueConverter Members   public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)   {     string parameterString = parameter as string;     if (parameterString == null)       return DependencyProperty.UnsetValue;      if (Enum.IsDefined(value.GetType(), value) == false)       return DependencyProperty.UnsetValue;      object parameterValue = Enum.Parse(value.GetType(), parameterString);      return parameterValue.Equals(value);   }    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)   {     string parameterString = parameter as string;     if (parameterString == null)         return DependencyProperty.UnsetValue;      return Enum.Parse(targetType, parameterString);   }   #endregion } 

And in the XAML-Part you use:

<Grid>     <Grid.Resources>       <l:EnumBooleanConverter x:Key='enumBooleanConverter' />     </Grid.Resources>     <StackPanel >       <RadioButton IsChecked='{Binding Path=VeryLovelyEnum, Converter={StaticResource enumBooleanConverter}, ConverterParameter=FirstSelection}'>first selection</RadioButton>       <RadioButton IsChecked='{Binding Path=VeryLovelyEnum, Converter={StaticResource enumBooleanConverter}, ConverterParameter=TheOtherSelection}'>the other selection</RadioButton>       <RadioButton IsChecked='{Binding Path=VeryLovelyEnum, Converter={StaticResource enumBooleanConverter}, ConverterParameter=YetAnotherOne}'>yet another one</RadioButton>     </StackPanel> </Grid>