Question

我想显示一些按钮动画, 在单击按钮事件被启动之前。我正使用 XAML 来达到这个效果, 但看起来就像 < code> 按钮。 Ispressed 触发器在单击事件后会被启动。

如何设定触发器, 让它在点击事件前先显示动画?

<Button x:Name="button" 
        Width="131" 
        Height="37" 
        Content="Button" 
        Margin="0,0,0,22" 
        Click="button_Click">
    <Button.Style>
        <Style TargetType="{x:Type Button}">
            <Style.Triggers>
                <Trigger Property="Button.IsPressed"  Value="True">
                    <Trigger.ExitActions>
                        <BeginStoryboard>
                            <Storyboard>
                                <DoubleAnimation Storyboard.TargetProperty="Width"
                                                 From="130" 
                                                 To="0" 
                                                 Duration="0:0:2"/>
                            </Storyboard>
                        </BeginStoryboard>
                    </Trigger.ExitActions>
                </Trigger>
            </Style.Triggers>
        </Style>
    </Button.Style>
</Button>

" 强势 " EDIT: " /强势 " 我试过了,但同样的东西。

<EventTrigger RoutedEvent="PreviewMouseLeftButtonDown">
    <BeginStoryboard>
        <Storyboard>
            <DoubleAnimation Storyboard.TargetProperty="Width" 
                             From="130" 
                             To="0" 
                             Duration="0:0:2"/>
        </Storyboard>
    </BeginStoryboard>
</EventTrigger>

Answer 1

您没有提及您想要动画何时启动, 但是您可以尝试使用 < a href=", http://msdn. microsoft. com/ en- us/library/ system. windows. uielement. previewmouseleftbuttondown. aspx" rel = “ no foollow” >Preview MouseLeft buttonDown

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