wpf datagrid field to image converter 字段 图片转化器

<DataGridTemplateColumn Header="Binding">
                            <DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <Image x:Name="BindImg" Height="30" Width="30" Source="{Binding IsBindable,Converter={StaticResource bindableConverter}}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
                                </DataTemplate>
                            </DataGridTemplateColumn.CellTemplate>                             
                        </DataGridTemplateColumn>

public class BindableConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            bool isBind;
            if(value==null||string.IsNullOrWhiteSpace(value.ToString()))
            {
                return "../../Resource/Images/unbinded.jpg";
            }
            if (Boolean.TryParse(value.ToString(), out isBind))
            {
                if (isBind)
                {
                    return "../../Resource/Images/binded.jpg";
                }
                else
                {
                    return "../../Resource/Images/unbinded.jpg";
                }
            }
            return null;
        }

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