所以我正在尝试动态创建控件(准确地说是RegularPolygon),并且我希望将2个PlaySoundActions添加到控件中,作为基于Tap事件的EventTrigger。目前我有以下代码:
EventTrigger trigger = new EventTrigger();
PlaySoundAction correct = new PlaySoundAction();
PlaySoundAction incorrect = new PlaySoundAction();
correct.Source = new Uri("/Sounds/Correct.mp3");
correct.Volume = 0.5;
incorrect.Source = new Uri("/Sounds/Incorrect.mp3");
incorrect.Volume = 0.5;
trigger.Actions.Add(correct); // this line doesn't work
trigger.Actions.Add(incorrect); // this also doesn't work
shape.Triggers.Add(trigger);
每一行都有错误,如
错误2参数1:无法转换 'Microsoft.Expression.Interactivity.Media.PlaySoundAction'来 'System.Windows.TriggerAction'
我不完全确定将PlaySoundAction对象强制转换为什么。我不想在XAML中这样做,因为我正在动态创建这些控件。
我还尝试为RegularPolygon创建一个Style,使EventTrigger具有PlaySoundAction,但是以编程方式设置控件的样式不会将此逻辑添加到控件中。
<Application.Resources>
<ResourceDictionary>
<Style TargetType="es:RegularPolygon" x:Key="Default">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Tap">
<eim:PlaySoundAction Source="/Sounds/Incorrect.mp3" Volume="0.5" />
<eim:PlaySoundAction Source="/Sounds/Correct.mp3" Volume="0.5" />
</i:EventTrigger>
</i:Interaction.Triggers>
</Style>
</ResourceDictionary>
</Application.Resources>
有没有办法在代码中添加EventTrigger / PlaySoundAction或创建一个控件可以继承的样式,具有EventTrigger / PlaySoundAction?
答案 0 :(得分:5)
也许知道您尝试在代码中使用System.Windows.EventTrigger而不是System.Windows.Interactivity.EventTrigger会有所帮助。当我明确指出 - 我让它工作:
System.Windows.Interactivity.EventTrigger trigger =
new System.Windows.Interactivity.EventTrigger();
trigger.EventName = "MouseLeftButtonDown";
PlaySoundAction correct = new PlaySoundAction();
correct.Source = new Uri("/Sample.wma", UriKind.Relative);
correct.Volume = 1.0;
trigger.Actions.Add(correct);
trigger.Attach(myTextBlock);
您需要确保也可以点击您的控件 - IsHitTestVisible不能设置为false并且需要设置填充画笔。不确定您的自定义控件是做什么的。
这是我的XAML:
<Grid
x:Name="ContentPanel"
Background="LightCoral"
Tap="ContentPanel_Tap"
Grid.Row="1"
Margin="12,0,12,0" >
<StackPanel>
<TextBlock
Text="XAML Test">
<i:Interaction.Triggers>
<i:EventTrigger
EventName="MouseLeftButtonDown">
<eim:PlaySoundAction
Source="/Balloon.wav"
Volume="1" />
</i:EventTrigger>
</i:Interaction.Triggers>
</TextBlock>
<TextBlock
Margin="0,100,0,0"
x:Name="myTextBlock"
Text="Coded Test" />
</StackPanel>
</Grid>