c# - StoryboardDoubleAnimation不适用于StackPanel Height属性

我正在尝试使用DoubleAnimation更改StackPanel的Height属性。该代码不会引发任何异常。但是动画不起作用。

            <StackPanel x:Name="FlyoutContent">

                <StackPanel.Resources>
                    <Storyboard x:Name="HideStackPanel">
                        <DoubleAnimation Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="190" To="0" Duration="0:0:1">
                            <DoubleAnimation.EasingFunction>
                                <PowerEase EasingMode="EaseIn"></PowerEase>
                            </DoubleAnimation.EasingFunction>
                        </DoubleAnimation>
                    </Storyboard>
                    <Storyboard x:Name="ShowStackPanel">
                        <DoubleAnimation Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="0" To="190" Duration="0:0:1">
                            <DoubleAnimation.EasingFunction>
                                <PowerEase EasingMode="EaseIn"></PowerEase>
                            </DoubleAnimation.EasingFunction>
                        </DoubleAnimation>
                    </Storyboard>
                </StackPanel.Resources>

                <TextBlock Margin="0, 20, 0, 0" FontWeight="Bold" Text="Change Current Password" TextWrapping="Wrap" Style="{StaticResource BasicTextStyle}" HorizontalAlignment="Left" IsTapEnabled="True" Tapped="ChangePasswordHeader_Tapped"/>
                <StackPanel x:Name="ChangePasswordPanel" Margin="0, 5, 0, 0" Height="0">

C#事件处理程序

private void ChangePasswordHeader_Tapped(object sender, TappedRoutedEventArgs e)
{
    if (ChangePasswordPanel.Height == 0)
    {
        ShowStackPanel.Begin();
    }
    else
    {
        HideStackPanel.Begin();
    }
}

它确实命中ChangePasswordHeader_Tapped事件处理程序，并按预期执行ShowStackPanel.Begin或HideStackPanel.Begin语句。但这对输出没有任何影响。 StackPanel的高度保持为0。

有什么想法吗？

最佳答案

我自己弄清楚了。我要做的就是在DoubleAnimation上启用从属动画(EnableDependentAnimation)，因为该动画会影响布局。然后它运行完美。

                        <Storyboard x:Name="HideChangePasswordPanel">
                            <DoubleAnimation EnableDependentAnimation="True" Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="190" To="0" Duration="0:0:0.2">
                                <DoubleAnimation.EasingFunction>
                                    <PowerEase EasingMode="EaseIn"></PowerEase>
                                </DoubleAnimation.EasingFunction>
                            </DoubleAnimation>
                        </Storyboard>
                        <Storyboard x:Name="ShowChangePasswordPanel">
                            <DoubleAnimation EnableDependentAnimation="True" Storyboard.TargetName="ChangePasswordPanel" Storyboard.TargetProperty="Height" From="0" To="190" Duration="0:0:0.2">
                                <DoubleAnimation.EasingFunction>
                                    <PowerEase EasingMode="EaseIn"></PowerEase>
                                </DoubleAnimation.EasingFunction>
                            </DoubleAnimation>
                        </Storyboard>

希望它可以节省一些时间!

关于c# - StoryboardDoubleAnimation不适用于StackPanel Height属性，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/13334470/