在C＃中如何在图像上动态创建触发器

Question

我正在尝试动态创建当您将鼠标悬停在图像上时会放大的图像。 我发现此博客文章http://tozon.info/blog/post/2007/10/14/Three-ways-to-make-your-WPF-images-pop-out-on-MouseOver.aspx显示了如何使用情节提要进行此操作。

它看起来非常简单，我已经将StoryBoard xaml添加到App.xaml中

现在，我需要弄清楚如何将它们添加到我在C＃中生成的图像中

必须创建的xaml如下所示

<Image Source="[Bitmap]" >
    <Image.Triggers>
        <EventTrigger RoutedEvent="Image.MouseEnter" >
            <BeginStoryboard Storyboard="{StaticResource ExpandStoryboard}" />
        </EventTrigger>
        <EventTrigger RoutedEvent="Image.MouseLeave" >
            <BeginStoryboard Storyboard="{StaticResource ShrinkStoryboard}" />
        </EventTrigger>
    </Image.Triggers>
    <Image.RenderTransform>
        <ScaleTransform ScaleX="1" ScaleY="1" />
    </Image.RenderTransform>
</Image>

我已经在C＃中创建了图像，情节提要和RenderTransform（我认为），但是我不确定如何将情节提要添加为EventTriggers。

System.Windows.Controls.Image _Image = new System.Windows.Controls.Image();
_Image.Source = this.BitmapToBitmapImage(_Bitmap); // This bit is not really relevant for this question. It works fine though.

ScaleTransform _OriginalScale = new ScaleTransform();
_OriginalScale.ScaleX = 1;
_OriginalScale.ScaleY = 1;

_Image.RenderTransform = _OriginalScale;

Storyboard _ExpandStory = (Storyboard)Application.Current.FindResource("ExpandStoryboard");
Storyboard _ShrinkStory = (Storyboard)Application.Current.FindResource("ShrinkStoryboard");

_Image.Triggers.Add(WHAT GOES HERE);

Answer 1

您可以再创建2个EventTrigger然后正常添加到Triggers 。

var e1 = new EventTrigger(UIElement.MouseEnterEvent);
//add actions for e1
e1.Actions.Add(new BeginStoryboard{ Storyboard = _ExpandStory});
var e2 = new EventTrigger(UIElement.MouseLeaveEvent);
//add actions for e2
e2.Actions.Add(new BeginStoryboard { Storyboard = _ShrinkStory});
//add the 2 event triggers
_Image.Triggers.Add(e1);
_Image.Triggers.Add(e2);