2、IValueConverter应用

1、C#代码如下：

   public class logotoimgConverter:IValueConverter
   {
       //将logo转换为URI
       public object Convert(object value, Type targetType, object parameter, string language)
       {
           logo c = (logo)value;
           switch (c)
           {
               case logo.Baidu:
                   return @"/Assets/Baidu.png";

               case logo.Google:
                   return @"/Assets/Google.png";//   /这个才是/正斜杠
               default:
                   return null;
           }

       }

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

2、在XAML中，

resource中有

 <local:logotoimgConverter x:Key="logC"/>

而在相对应要转换值的绑定的控件加入

 <Image Width="100" Height="100" Source="{Binding Path=logo, Converter={StaticResource logC}}"/>