如图样：
在View中：
<RadioButton IsChecked="{Binding Option, Converter={cvt:EnumToBooleanConverter},ConverterParameter={x:Static enum:RadionButtonOptions.One}}" Content="One" DockPanel.Dock="Top"/>
<RadioButton IsChecked="{Binding Option, Converter={cvt:EnumToBooleanConverter},ConverterParameter={x:Static enum:RadionButtonOptions.Two}}" Content="Two" DockPanel.Dock="Top"/>
<RadioButton IsChecked="{Binding Option, Converter={cvt:EnumToBooleanConverter},ConverterParameter={x:Static enum:RadionButtonOptions.Three}}" Content="Two" DockPanel.Dock="Top"/>
在ViewModel中：
public const string OptionPropertyName = "Option";
private RadionButtonOptions _option;
public RadionButtonOptions Option
{
get
{
return _option;
}
set
{
if (_option == value)
return;
_option = value;
RaisePropertyChanged(OptionPropertyName);
}
}
Converter：
[MarkupExtensionReturnType(typeof(EnumToBooleanConverter))]
[ValueConversion(typeof(Enum), typeof(bool))]
public class EnumToBooleanConverter
: MarkupExtension, IValueConverter
{
private static EnumToBooleanConverter converter = null;
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (null == converter)
{
converter = new EnumToBooleanConverter();
}
return converter;
}
public object Convert(object value, Type targetType, object parameter,
System.Globalization.CultureInfo culture)
{
return value.Equals(parameter);
}
public object ConvertBack(object value, Type targetType,
object parameter, System.Globalization.CultureInfo culture)
{
return value.Equals(true) ? parameter : Binding.DoNothing;
}
}
枚举类型：
public enum RadionButtonOptions
{
One,
Two,
Three,
}
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整理代码之后把转换器的ConvertBack方法体错写成
return Binding.DoNothing;
也是醉了。
。