页面导航时，实现淡入淡出效果

1、首先引入 toolkit 命名空间：xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
 2、在 app.xaml 文件中加入：

<Style x:Key="SlideTransitionPageStyle" TargetType="phone:PhoneApplicationPage">
                <Setter Property="toolkit:TransitionService.NavigationInTransition">
                    <Setter.Value>
                        <toolkit:NavigationInTransition>
                            <toolkit:NavigationInTransition.Backward>
                                <toolkit:SlideTransition Mode="SlideRightFadeIn"/>
                            </toolkit:NavigationInTransition.Backward>
                            <toolkit:NavigationInTransition.Forward>
                                <toolkit:SlideTransition Mode="SlideLeftFadeIn"/>
                            </toolkit:NavigationInTransition.Forward>
                        </toolkit:NavigationInTransition>
                    </Setter.Value>
                </Setter>
                <Setter Property="toolkit:TransitionService.NavigationOutTransition">
                    <Setter.Value>
                        <toolkit:NavigationOutTransition>
                            <toolkit:NavigationOutTransition.Backward>
                                <toolkit:SlideTransition Mode="SlideRightFadeOut"/>
                            </toolkit:NavigationOutTransition.Backward>
                            <toolkit:NavigationOutTransition.Forward>
                                <toolkit:SlideTransition Mode="SlideLeftFadeOut"/>
                            </toolkit:NavigationOutTransition.Forward>
                        </toolkit:NavigationOutTransition>
                    </Setter.Value>
                </Setter>
            </Style>

3、

在 PhoneApplicationPage 页面加入：

<phone:PhoneApplicationPage    Style="{StaticResource SlideTransitionPageStyle}"     >