Silverlight for windows phone 禁掉了大部分 EventTrigger

今天上午在搞 EventTrigger的時候，發現，除了Loaded可以用，其餘的UIElement.TapEvent等等都不能用了。

折騰了許久，查閱MSDN，發現：

In XAML you specify this as a string. In code, pass the identifier (a RoutedEvent value.) The only supported value in Silverlight is Loaded/FrameworkElement.LoadedEvent.

http://technet.microsoft.com/en-us/library/system.windows.eventtrigger.routedevent(v=vs.95).aspx

 

 

EventTrigger and the object.Triggers property element usage on elements are supported by Silverlight, but using this technique is discouraged for current applications.EventTrigger can only support a triggering action for the Loaded event (you name the event in the EventTrigger.RoutedEvent property.) This makes an EventTrigger unsuitable for most run-time interactions. Instead of using EventTrigger and the Triggers property, consider one of the following two alternatives:

 

• For animating properties on objects that are not controls, place the storyboard in the general Resources for a page or application. Then assign an event handler on the element where you would have placed "Triggers". The event handler, when responding to the relevant event, should retrieve the storyboard from the resource dictionary. You then call Begin on the retrieved Storyboard.

• For animating properties on objects that are controls (derive from Control), use the VisualStateManager technique, and run the appropriate animations based on state of or inputs to the control by calling GoToState.

http://technet.microsoft.com/en-us/library/system.windows.eventtrigger(v=vs.95).aspx

 

悲劇！

推薦使用VisualState，好吧。

告別了，

 <StackPanel Margin="0,1,-5,0" Orientation="Horizontal">
                <CheckBox Content="張三"  FontSize="26" Foreground="White"  x:Name="chk"/>
                <TextBlock Text="13512312312" VerticalAlignment="Center" FontSize="18" Foreground="Gray" Margin="5,8,0,0" />
                <StackPanel.Triggers>
                    <EventTrigger RoutedEvent="StackPanel.Loaded">
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation From="26" To="30" Duration="00:00:03" Storyboard.TargetName="chk" Storyboard.TargetProperty="FontSize"/>
                            </Storyboard>
                        </BeginStoryboard>
                    </EventTrigger>
                </StackPanel.Triggers>
            </StackPanel>