你不能動畫並行代碼如下兩個屬性可以幫助您動畫名稱的窗口的高度和寬度爲mywindow
<Button Content="Click">
<Button.Triggers>
<EventTrigger RoutedEvent="Button.Click">
<EventTrigger.Actions>
<BeginStoryboard >
<Storyboard RepeatBehavior="Forever" AutoReverse="False">
<DoubleAnimation Storyboard.TargetName="myWindow"
Storyboard.TargetProperty = "(Window.Height)"
To="300" Duration="0:0:5"/>
<Storyboard RepeatBehavior="Forever" AutoReverse="False">
<DoubleAnimation Storyboard.TargetName="myWindow"
Storyboard.TargetProperty = "(Window.Width)"
To="300" Duration="0:0:5"/>
</Storyboard>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Button.Triggers>
</Button>