WPF 窗口淡入不起作用

发布于 2024-11-09 03:15:51 字数 775 浏览 1 评论 0原文

我有以下代码：

<Window.Background>
    <SolidColorBrush Opacity="0.7" Color="White" x:Name="BackgroundBrush"></SolidColorBrush>
</Window.Background>
<Window.Triggers>
    <EventTrigger RoutedEvent="Loaded">
        <EventTrigger.EnterActions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:5" Storyboard.TargetName="BackgroundBrush" From="0.7">
                    </DoubleAnimation>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.EnterActions>
    </EventTrigger>
</Window.Triggers>

但是显示窗口时没有任何反应。为什么？

原文

I have the following code:

<Window.Background>
    <SolidColorBrush Opacity="0.7" Color="White" x:Name="BackgroundBrush"></SolidColorBrush>
</Window.Background>
<Window.Triggers>
    <EventTrigger RoutedEvent="Loaded">
        <EventTrigger.EnterActions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:5" Storyboard.TargetName="BackgroundBrush" From="0.7">
                    </DoubleAnimation>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.EnterActions>
    </EventTrigger>
</Window.Triggers>

But nothing happened when window is shown. Why?

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只是我以为 2024-11-16 03:15:51

您必须为窗口本身而不是背景的不透明度设置动画。
您需要设置 AllowsTransparency< /a> 为 true，这还需要 WindowStyle 设置为 None。（您需要创建自己的标准窗口按钮）

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快乐很简单 2024-11-16 03:15:51

除了 HB 所说的之外，您还需要将 BeginStoryboard 添加到 EventTrigger.Actions 集合，而不是 EnterActions 集合。所以这有效：

<Window.Background>
    <SolidColorBrush Opacity="0.7" Color="White" x:Name="BackgroundBrush"></SolidColorBrush>
</Window.Background>
<Window.Triggers>
    <EventTrigger RoutedEvent="Loaded">
        <EventTrigger.Actions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:5" Storyboard.TargetName="BackgroundBrush" From="0.7">
                    </DoubleAnimation>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
</Window.Triggers>

In addition to what H.B. said, you need to add your BeginStoryboard to the EventTrigger.Actions collection, not the EnterActions collection. So this works:

<Window.Background>
    <SolidColorBrush Opacity="0.7" Color="White" x:Name="BackgroundBrush"></SolidColorBrush>
</Window.Background>
<Window.Triggers>
    <EventTrigger RoutedEvent="Loaded">
        <EventTrigger.Actions>
            <BeginStoryboard>
                <Storyboard>
                    <DoubleAnimation Storyboard.TargetProperty="Opacity" To="1" Duration="0:0:5" Storyboard.TargetName="BackgroundBrush" From="0.7">
                    </DoubleAnimation>
                </Storyboard>
            </BeginStoryboard>
        </EventTrigger.Actions>
    </EventTrigger>
</Window.Triggers>

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