在 WPF 中,我为边框设置了以下样式:
<Style TargetType="Border" x:Key="BorderBlinking">
<Style.Triggers>
<DataTrigger Binding="{Binding PopupBlinking}" Value="True">
<DataTrigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Opacity"
To="0" AutoReverse="True" Duration="0:0:0.5" SpeedRatio="3" RepeatBehavior="3x" />
</Storyboard>
</BeginStoryboard>
</DataTrigger.EnterActions>
<DataTrigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetProperty="Opacity"
To="1" AutoReverse="True" Duration="0:0:0.5" />
</Storyboard>
</BeginStoryboard>
</DataTrigger.ExitActions>
</DataTrigger>
</Style.Triggers>
</Style>
我像这样附加到边界:
<Border Grid.Row="2" x:Name="popup"
Style="{StaticResource BorderBlinking}"
CornerRadius="10,10,0,0" Height="25" Margin="0"
HorizontalAlignment="Center" Width="Auto"
VerticalAlignment="Center"
BorderBrush="DarkBlue" BorderThickness="1"
Background="AntiqueWhite">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
<Image Source="Common.Images;component/Images/Info.png" Height="20" Width="20" Stretch="Fill"/>
<TextBlock Margin="5" VerticalAlignment="Center" HorizontalAlignment="Left"
Background="Transparent" FontSize="12"><Run Text="this is a custom popup"/></TextBlock>
</StackPanel>
</Border>
然后从我后面的代码(不是 View 模型)开始,我想开始 Storyboard。我知道如何通过绑定(bind)到数据触发器的属性“PopupBlinking”(如上例中的)从 View 模型启动它,但现在我需要知道如何从代码隐藏(而不是 View 模型)启动它。
我修改了上面的代码并在下面完成:
<Storyboard x:Key="Blink" >
<DoubleAnimation Storyboard.TargetProperty="Opacity"
To="0" AutoReverse="True" Duration="0:0:0.5" SpeedRatio="3" RepeatBehavior="3x" />
<DoubleAnimation Storyboard.TargetProperty="Opacity"
To="1" AutoReverse="True" Duration="0:0:0.5" />
</Storyboard>
并从代码隐藏:
Storyboard sb = Resources["Blink"] as Storyboard;
sb.Begin(this.popup);
这是正确的方法吗?
最佳答案
您可以像这样直接启动动画:
popup.BeginAnimation(UIElement.OpacityProperty,
new DoubleAnimation
{
To = 0,
Duration = TimeSpan.FromSeconds(0.5),
AutoReverse = true,
RepeatBehavior = RepeatBehavior.Forever
});
关于wpf - 从代码隐藏(xaml.cs)开始 Storyboard,而不是从 View 模型 MVVM,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/45321169/