WPF / Silverlight Binding Convertor 用法

需要在三个地方做处理：

1 . 定义Convertor　　

    public class RememberStatusConvertor : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var rememberStatus = (RememberStatus)value;
            switch (rememberStatus)
            {
                case RememberStatus.NotRemember:
                    return "（无）";
                case RememberStatus.Remembering:
                    return "记忆中...";
                default:
                    return "已记住";
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }

2 . 在XAML文件中加入资源

 <BLL:RememberStatusConvertor x:Key="rememberStatusConvertor"/>

3 . 在XAML中使用资源

<TextBlock Grid.Column="2" Text="{Binding Path=Word.RememberStatus,Converter={StaticResource rememberStatusConvertor}}" 
                                           FontSize="28" Style="{StaticResource listboxTextBlock}"/>