我是 wpf 的新手,正在寻找好的教程来帮助更好地理解触发器,但我运气不佳。所以我想我会在这里寻求帮助。这是我想要做的,我有一个具有堆栈面板的 ScrollViewer,在我浏览媒体文件夹并使用 foreach 循环将 MediaElements 添加到堆栈面板的代码中,我想要做的是当用户悬停在一个其中,我希望它在它下面发光,我被告知触发器是要走的路,所以这是我到目前为止所拥有的
前锋
MediaElement newVideoPreview = new MediaElement();
newVideoPreview.Width = 125;
newVideoPreview.Stretch = Stretch.Uniform;
newVideoPreview.Margin = new Thickness(5, 5, 5, 5);
newVideoPreview.Volume = 0;
Trigger trig = new Trigger();
trig.Property = IsMouseOverProperty;
trig.Value = true;
Style style = new Style();
style.TargetType = newVideoPreview.GetType();
style.Triggers.Add(trig);
Setter set = new Setter();
OuterGlowBitmapEffect glow = new OuterGlowBitmapEffect();
glow.GlowColor = Color.FromRgb(0, 0, 205);
glow.GlowSize = 10;
set.Value = glow; // <- Crash house
set.Property = EffectProperty;
style.Setters.Add(set);
newVideoPreview.Style = style;
如您所见,当我尝试设置 setter.value 时出现无效参数异常,我正在寻找有关如何解决此问题或做得更好或更好的教程的建议...感谢您的帮助
ps 我正在使用 VS2010 beta 2
更新我也尝试过这个dosent工作....
<UserControl x:Class="WiiDSUKiosk.WiiFriendlyScrollViewer"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid>
<Grid.Resources>
<Style TargetType="{x:Type UIElement}">
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="BitmapEffect">
<Setter.Value>
<OuterGlowBitmapEffect GlowColor="Navy" GlowSize="10"/>
</Setter.Value>
</Setter>
</Trigger>
</Style.Triggers>
</Style>
</Grid.Resources>
<ScrollViewer Name="wiiFriendlyScrollViewer" ScrollViewer.HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Hidden"
MouseMove="wiiFriendlyScrollViewer_MouseMove" >
<StackPanel Name="stackPanelContent" ScrollViewer.HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Hidden">
</StackPanel>
</ScrollViewer>
</Grid>