如何启动附加到数据模板内部控件的情节提要？

Question

I have a storyboard inside a data template. I want to start this only for a certain condition. In my case whenever the no. of seconds in the clock is 59 the storyboard should start.

Below you can see the storyboard as well as the control to which the animation is applied :

<!-- Minute Hand -->
                <Image
                    Source="{Binding Time, Converter={StaticResource MinHandBackground}}"
                    HorizontalAlignment="Left"                        
                    VerticalAlignment="Top"                        
                    Canvas.Left="118"
                    Canvas.Top="118">
                    <Image.RenderTransform>
                        <TransformGroup>
                            <TranslateTransform
                                X="-11"
                                Y="-90" />

                            <RotateTransform
                                x:Name="minHandTransform" />


                        </TransformGroup>
                    </Image.RenderTransform>

                    <Image.Triggers>


                        <EventTrigger
                            RoutedEvent="Image.Loaded">
                            <BeginStoryboard>
                                <Storyboard
                                    x:Name="myStoryboard2">
                                    <DoubleAnimation
                                        x:Name="minuteAnimation"
                                        Storyboard.TargetName="minHandTransform"
                                        Storyboard.TargetProperty="Angle"
                                        Duration="0:0:1"
                                        From="{Binding Time, Converter={StaticResource minuteHandTransform}}"
                                        To="{Binding Time, Converter={StaticResource minuteHandToTransform}}"
                                        RepeatBehavior="1x">
                                        <DoubleAnimation.EasingFunction>
                                            <SineEase
                                                EasingMode="EaseOut" />
                                        </DoubleAnimation.EasingFunction>
                                    </DoubleAnimation>
                                </Storyboard>
                            </BeginStoryboard>
                        </EventTrigger>

                    </Image.Triggers>
                </Image>

Currently the BeginStoryboard starts it immediately on load. I want to start it when the number of seconds is 59 but i cant access the storyboard in the back end as the control is within a data template.

Can anyone please help me out here.....i have been banging my head about this problem for a lot of days now!!

Answer 1

最简单的方法是将DataTemplate的全部内容移动到单独的UserControl，这样您就可以更轻松地访问所有命名的元素。