ChildWindow在Open时旋转出现

在App.xaml中：

<VisualState x:Name="Open">
　　<Storyboard>
　　　　<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="ContentRoot">
　　　　　　<EasingDoubleKeyFrame KeyTime="0" Value="90"/>
　　　　　　<EasingDoubleKeyFrame KeyTime="0:0:1" Value="0"/>
　　　　</DoubleAnimationUsingKeyFrames>
　　</Storyboard>
</VisualState>

其次，在<Grid x:Name="ContentRoot"...> 中加入：

<Grid.Projection>
    <PlaneProjection/>
</Grid.Projection>

 下面是两个窗口翻转出现的例子：A窗口在前为调用窗口，B窗口在后为被调用窗口。

A窗口在app.xaml中的样式：

                                <VisualStateGroup x:Name="AnimationStates">
                                    <VisualState x:Name="WindowShow">
                                        <Storyboard>
                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="ContentRoot">
                                                <EasingDoubleKeyFrame KeyTime="0" Value="-90"/>
                                                <EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="-90"/>
                                                <EasingDoubleKeyFrame KeyTime="0:0:1" Value="0"/>
                                            </DoubleAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="WindowHide">
                                        <Storyboard>
                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="ContentRoot">
                                                <EasingDoubleKeyFrame KeyTime="0" Value="0"/>
                                                <EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="90"/>
                                            </DoubleAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>

B窗口在app.xaml中的样式：

                                <VisualStateGroup x:Name="WindowStates">
                                    <VisualState x:Name="Open">
                                        <Storyboard>
                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="ContentRoot">
                                                <EasingDoubleKeyFrame KeyTime="0:0:0" Value="-90"/>
                                                <EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="-90"/>
                                                <EasingDoubleKeyFrame KeyTime="0:0:1" Value="0"/>
                                            </DoubleAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                    <VisualState x:Name="Closed">
                                        <Storyboard>
                                            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="ContentRoot">
                                                <EasingDoubleKeyFrame KeyTime="0:0:0" Value="0"/>
                                                <EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="90"/>
                                            </DoubleAnimationUsingKeyFrames>
                                        </Storyboard>
                                    </VisualState>
                                </VisualStateGroup>

A窗口中某一个按钮的代码：

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            VisualStateManager.GoToState(this, "WindowHide", true);
            WinB w = new WinB();
            w.Show();
            w.Closed += new EventHandler(w_Closed);
        }

        void w_Closed(object sender, EventArgs e)
        {
            VisualStateManager.GoToState(this, "WindowShow", true);
        }

 另外，RotationY的值为：

0：向前；

180：向后；

90：向左；

-90：向右。